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• How to specify what network interface to use with TTCP or IPERF?

  - by Sammy

  The PC has two Gigabit Ethernet ports. They function as two separate network adapters. I'm trying to do a simple loopback test between the two. I've tried TTCP and IPERF. They're giving me hard time because I'm using the same physical PC. Using pcattcp... On the receiver end: C:\PCATTCP-0114>pcattcp -r PCAUSA Test TCP Utility V2.01.01.14 (IPv4/IPv6) IP Version : IPv4 Started TCP Receive Test 0... TCP Receive Test Local Host : GIGA ************** Listening...: On TCPv4 0.0.0.0:5001 Accept : TCPv4 0.0.0.0:5001 <- 10.1.1.1:33904 Buffer Size : 8192; Alignment: 16384/0 Receive Mode: Sinking (discarding) Data Statistics : TCPv4 0.0.0.0:5001 <- 10.1.1.1:33904 16777216 bytes in 0.076 real seconds = 215578.95 KB/sec +++ numCalls: 2052; msec/call: 0.038; calls/sec: 27000.000 C:\PCATTCP-0114> On the transmitter end: C:\PCATTCP-0114>PCATTCP.exe -t 10.1.1.1 PCAUSA Test TCP Utility V2.01.01.14 (IPv4/IPv6) IP Version : IPv4 Started TCP Transmit Test 0... TCP Transmit Test Transmit : TCPv4 0.0.0.0 -> 10.1.1.1:5001 Buffer Size : 8192; Alignment: 16384/0 TCP_NODELAY : DISABLED (0) Connect : Connected to 10.1.1.1:5001 Send Mode : Send Pattern; Number of Buffers: 2048 Statistics : TCPv4 0.0.0.0 -> 10.1.1.1:5001 16777216 bytes in 0.075 real seconds = 218453.33 KB/sec +++ numCalls: 2048; msec/call: 0.037; calls/sec: 27306.667 C:\PCATTCP-0114> It's responding alright. But why does it say 0.0.0.0? Is it passing through only one of the network adapters? I want 10.1.1.1 to be the server (receiver) and 10.1.1.2 to be the client (transmitter). These are the IP addresses assigned manually to each network adapter. How do I specify these addresses in TTCP? There is also the IPERF tool which has the -B option. Unfortunately I've been only able to use this option to bind the server to the 10.1.1.1 address. I was unable to bind the client to the 10.1.1.2 address. I might be doing it wrong. Can the -B option be used for both the server as well as the client side? What does the syntax look like for the client?

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• How to add an iptables rule with source IP address

  - by ???

  I have a bash script that starts with this: if [[ $EUID -ne 0 ]]; then echo "Permission denied (are you root?)." exit 1 elif [ $# -ne 1 ] then echo "Usage: install-nfs-server <client network/CIDR>" echo "$ bash install-nfs-server 192.168.1.1/24" exit 2 fi; I then try to add the iptables rules for NFS as follows: iptables -A INPUT -i eth0 -p tcp -s $1 --dport 111 -m state --state NEW,ESTABLISHED -j ACCEPT iptables -A OUTPUT -o eth0 -p tcp --sport 111 -m state --state ESTABLISHED -j ACCEPT iptables -A INPUT -i eth0 -p udp -s $1 --dport 111 -m state --state NEW,ESTABLISHED -j ACCEPT iptables -A OUTPUT -o eth0 -p udp --sport 111 -m state --state ESTABLISHED -j ACCEPT service iptables save service iptables restart I get the error: Try iptables -h' or 'iptables --help' for more information. Bad argument111' Try iptables -h' or 'iptables --help' for more information. Bad argument111' Saving firewall rules to /etc/sysconfig/iptables: ^[[60G[^[[0;32m OK ^[[0;39m]^M Flushing firewall rules: ^[[60G[^[[0;32m OK ^[[0;39m]^M Setting chains to policy ACCEPT: filter ^[[60G[^[[0;32m OK ^[[0;39m]^M Unloading iptables modules: ^[[60G[^[[0;32m OK ^[[0;39m]^M Applying iptables firewall rules: ^[[60G[^[[0;32m OK ^[[0;39m]^M Loading additional iptables modules: ip_conntrack_netbios_ns ^[[60G[^[[0;32m OK ^[[0;39m]^M When I open /etc/sysconfig/iptables these are the rules: # Generated by iptables-save v1.3.5 on Mon Mar 26 08:00:42 2012 *filter :INPUT ACCEPT [0:0] :FORWARD ACCEPT [0:0] :OUTPUT ACCEPT [466:54208] :RH-Firewall-1-INPUT - [0:0] -A INPUT -j RH-Firewall-1-INPUT -A FORWARD -j RH-Firewall-1-INPUT -A OUTPUT -o eth0 -p tcp -m tcp --sport 111 -m state --state ESTABLISHED -j ACCEPT -A OUTPUT -o eth0 -p udp -m udp --sport 111 -m state --state ESTABLISHED -j ACCEPT -A OUTPUT -o eth0 -p tcp -m tcp --sport 111 -m state --state ESTABLISHED -j ACCEPT -A OUTPUT -o eth0 -p udp -m udp --sport 111 -m state --state ESTABLISHED -j ACCEPT -A RH-Firewall-1-INPUT -p tcp -m state --state NEW -m tcp --dport 111 -j ACCEPT -A RH-Firewall-1-INPUT -p udp -m state --state NEW -m udp --dport 111 -j ACCEPT -A RH-Firewall-1-INPUT -p tcp -m state --state NEW -m tcp --dport 111 -j ACCEPT -A RH-Firewall-1-INPUT -p tcp -m state --state NEW -m tcp --dport 111 -j ACCEPT -A RH-Firewall-1-INPUT -p tcp -m state --state NEW -m tcp --dport 111 -j ACCEPT -A RH-Firewall-1-INPUT -p tcp -m state --state NEW -m tcp --dport 111 -j ACCEPT -A RH-Firewall-1-INPUT -p tcp -m state --state NEW -m tcp --dport 111 -j ACCEPT -A RH-Firewall-1-INPUT -p tcp -m state --state NEW -m tcp --dport 111 -j ACCEPT -A RH-Firewall-1-INPUT -i lo -j ACCEPT -A RH-Firewall-1-INPUT -p icmp -m icmp --icmp-type any -j ACCEPT -A RH-Firewall-1-INPUT -p esp -j ACCEPT -A RH-Firewall-1-INPUT -p ah -j ACCEPT -A RH-Firewall-1-INPUT -d 224.0.0.251 -p udp -m udp --dport 5353 -j ACCEPT -A RH-Firewall-1-INPUT -p udp -m udp --dport 631 -j ACCEPT -A RH-Firewall-1-INPUT -p tcp -m tcp --dport 631 -j ACCEPT -A RH-Firewall-1-INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT -A RH-Firewall-1-INPUT -p tcp -m state --state NEW -m tcp --dport 22 -j ACCEPT -A RH-Firewall-1-INPUT -j REJECT --reject-with icmp-host-prohibited COMMIT # Completed on Mon Mar 26 08:00:42 2012 ~ "/etc/sysconfig/iptables" 32L, 1872C I've also tried: iptables -I RH-Firewall-1-INPUT 1 -m state --state NEW -m tcp -p tcp --source $1 --dport 111 -j ACCEPT iptables -I RH-Firewall-1-INPUT 2 -m udp -p udp --source $1 --dport 111 -j ACCEPT

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• DNS and DHCP dies after ~2 days of use on ClearOS

  - by TheLQ

  I'm using ClearOS (based on CentOS, so any info specific to it should apply here) as a gateway, DHCP, and DNS server. I had this server running perfectly for a month or two before replacing it with another server. However due DNS and DHCP failing 2 days in and a host of other performance issues (the box was a little underpowered), I changed back to the origional server. However 2 days in DHCP and DNS are failing again, and I'm out of idea's on why. In both cases to my knowledge no network or server changes occurred after installation. Right after installing (and at least a day in) DNS and DHCP was working just fine. However later (Day 2) I get a call saying their internet is down (translation: Nobody can get to websites because DNS is down) I've tried to fix the problem by checking if the dnsmasq is even running (it is), restarting the service, and restarting the server to no effect. I do have two internal servers that have static DHCP leases but one's lease must of expired as I can't connect to it anymore. I'm hesitant to do any dhcp testing on the last server as I'll not be able to connect to it anymore. Is there anything anyone can think of on why DNS and DHCP would fail 2 days in to running perfectly? More info: Running dnsmasq in debug mode. This is all that's displayed even when running nslookup quackwall. I'm not sure though if nslookup commands should show up in the log [root@quackwall ~]# /usr/sbin/dnsmasq -dq dnsmasq: started, version 2.49 cachesize 150 dnsmasq: compile time options: IPv6 GNU-getopt no-DBus no-I18N DHCP TFTP dnsmasq-dhcp: DHCP, IP range 10.0.0.100 -- 10.0.0.254, lease time 12h dnsmasq: reading /etc/resolv.conf dnsmasq: using nameserver 74.128.17.114#53 dnsmasq: using nameserver 74.128.19.102#53 dnsmasq: read /etc/hosts - 5 addresses dnsmasq-dhcp: read /etc/ethers - 2 addresses On the other server DNS and the Gateway are all configured correctly (10.0.0.2 is quackwall) lordquackstar@quackgame:~$ netstat -rn Kernel IP routing table Destination Gateway Genmask Flags MSS Window irtt Iface 10.0.0.0 0.0.0.0 255.255.240.0 U 0 0 0 eth0 0.0.0.0 10.0.0.2 0.0.0.0 UG 0 0 0 eth0 lordquackstar@quackgame:~$ cat /etc/resolv.conf nameserver 10.0.0.2 domain highwow.lan search highwow.lan

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• My server freezes within a few hours of logging out. Staying logged in keeps the server running

  - by HappyEngineer

  I have an Ubuntu Godaddy server I use to host mail and webapps. It started having problems a couple months ago. It would lock up and stop responding to anything. I couldn't ssh into it, so I'd have godaddy power cycle the server. I have never seen anything that looked suspicious in the var logs (although I'm no expert at reading them). An fsck turned up no problems. Godaddy replaced the ram, but found no hardware problems. I started logging the output from "top" to a log file and found that even that stops running when the server freezes. Now, here is the crazy part: It got so bad that it would actually go down every few hours, but then it stopped going down. I eventually realized I had left an ssh terminal logged into the machine running top. This seemed unlikely to be a reason, but after the server was up with no problems for a full week (remember, it had been going down after just a few hours), I disconnected from the ssh session. Lo and behold, within a few hours the server froze again! I had them power cycle again and then left another ssh session open with top. It has been going without problems for 8 days now. I told others about this and they hardly believe me. I simply can't imagine what is going on. I don't know what else to try other than to just get a new server and reinstall everything. Does anyone have any ideas about what I can look for to determine what the cause is? Is it possible there's some sort of exploit on the server which only runs if everyone is logged out of the system? EDIT: The power management gone haywire sounds plausible, so I've modified the /boot/grub/menu.lst to boot with acpi=off and apm=off. It appears to have prevented kacpid and kacpid_notify from being in the process list, so I assume I did that right. I've disconnected all my sessions from the server. I'll check later tonight to see if it's still up. If it goes down then I'll try the pinging process idea. EDIT: It went down again. It lasted about a day. I've had them reboot, so now I'll try running "nohup ping -i 5 google.com &" and then disconnect. If it goes down again I'll come back. Hopefully someone will have some more ideas.

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• Apache2 return 404 for proxy requests before reaching WSGI

  - by Alejandro Mezcua

  I have a Django app running under Apache2 and mod_wsgi and, unfortunately, lots of requests trying to use the server as a proxy. The server is responding OK with 404 errors but the errors are generated by the Django (WSGI) app, which causes a high CPU usage. If I turn off the app and let Apache handle the response directly (send a 404), the CPU usage drops to almost 0 (mod_proxy is not enabled). Is there a way to configure Apache to respond directly to this kind of requests with an error before the request hits the WSGI app? I have seen that maybe mod_security would be an option, but I'd like to know if I can do it without it. EDIT. I'll explain it a bit more. In the logs I have lots of connections trying to use the server as a web proxy (e.g. connections like GET http://zzz.zzz/ HTTP/1.1 where zzz.zzz is an external domain, not mine). This requests are passed on to mod_wsgi which then return a 404 (as per my Django app). If I disable the app, as mod_proxy is disabled, Apache returns the error directly. What I'd finally like to do is prevent Apache from passing the request to the WSGI for invalid domains, that is, if the request is a proxy request, directly return the error and not execute the WSGI app. EDIT2. Here is the apache2 config, using VirtualHosts files in sites-enabled (i have removed email addresses and changed IPs to xxx, change the server alias to sample.sample.xxx). What I'd like is for Apache to reject any request that doesn't go to sample.sample.xxx with and error, that is, accept only relative requests to the server or fully qualified only to the actual ServerAlias. default: <VirtualHost *:80> ServerAdmin [email protected] ServerName X.X.X.X ServerAlias X.X.X.X DocumentRoot /var/www/default <Directory /> Options FollowSymLinks AllowOverride None </Directory> <Directory /var/www/> Options FollowSymLinks AllowOverride None Order allow,deny allow from all </Directory> ErrorDocument 404 "404" ErrorDocument 403 "403" ErrorDocument 500 "500" ErrorLog ${APACHE_LOG_DIR}/error.log LogLevel warn CustomLog ${APACHE_LOG_DIR}/access.log combined </VirtualHost> actual host: <VirtualHost *:80> ErrorDocument 404 "404" ErrorDocument 403 "403" ErrorDocument 500 "500" WSGIScriptAlias / /var/www/sample.sample.xxx/django.wsgi ServerAdmin [email protected] ServerAlias sample.sample.xxx ServerName sample.sample.xxx CustomLog /var/www/sample.sample.xxx/log/sample.sample.xxx-access.log combined Alias /robots.txt /var/www/sample.sample.xxx/static/robots.txt Alias /favicon.ico /var/www/sample.sample.xxx/static/favicon.ico AliasMatch ^/([^/]*\.css) /var/www/sample.sample.xxx/static/$1 Alias /static/ /var/www/sample.sample.xxx/static/ Alias /media/ /var/www/sample.sample.xxx/media/ <Directory /var/www/sample.sample.xxx/static/> Order deny,allow Allow from all </Directory> <Directory /var/www/sample.sample.xxx/media/> Order deny,allow Allow from all </Directory> </VirtualHost>

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• Installing OpenLDAP on Fedora 12: ldap_bind: Invalid credentials (49)

  - by Alpha Hydrae

  I've been trying to set up the OpenLDAP installed by default on Fedora 12, very unsuccessfully. My ultimate goal is to use LDAP authentication for user login and Apache, using the OpenLDAP server running on the same machine. The server is running, but the error I always get when I try to use ldapsearch or ldapadd is: ldap_bind: Invalid credentials (49) I've been following these tutorials, but none of them helped me: http://www.howtoforge.com/openldap_fedora7 http://www.redhat.com/docs/manuals/linux/RHL-9-Manual/ref-guide/s1-ldap-quickstart.html http://www.howtoforge.com/linux_ldap_authentication http://docs.fedoraproject.org/deployment-guide/f12/en-US/html/s1-ldap-pam.html http://www.openldap.org/doc/admin24/quickstart.html First, some components were already installed, and I installed these with yum: yum install openldap-servers openldap-devel Then, I created a basic slapd.conf file in /etc/openldap: database bdb suffix "dc=sniejana-sandbox,dc=com" rootdn "cn=root,dc=sniejana-sandbox,dc=com" rootpw {SSHA}cxdz55ygPu4T3ykg7dgu+L0VRvsFSeom directory /var/lib/ldap/sniejana-sandbox.com I obtained the rootpw with this command: slappasswd -s changeme I also created the /var/lib/ldap/sniejana-sandbox.com directory and made sure the entire contents of /var/lib/ldap were owned by the ldap user. I found two ldap.conf files, one in /etc and one in /etc/openldap. I don't know which is the right one. If I understood correctly, this file is to configure the client. I put this in both: HOST localhost BASE dc=sniejana-sandbox,dc=com I then ran the server with: service slapd start It said OK. Most of the tutorials above say to use the command ldapsearch -D "cn=Manager,dc=my-domain,dc=com" -W to ensure that everything's working. When I execute this command, a password prompt appears, and after entering the password, I get the error. ldapsearch -D "cn=root,dc=sniejana-sandbox,dc=com" -W Enter LDAP password: ldap_bind: Invalid credentials (49) The same thing happens when trying to use ldapadd. I tried with an encrypted and unencrypted password in slapd.conf, it doesn't change anything. Adding a -x for simple authentication doesn't change anything either. netstat -ap confirms the server is listening: tcp 0 0 *:ldap *:* LISTEN 4148/slapd tcp 0 0 *:ldap *:* LISTEN 4148/slapd ps -ef|grep slapd confirms the process is running: ldap 4148 1 0 15:22 ? 00:00:00 /usr/sbin/slapd -h ldap:/// -u ldap Running slaptest procudes config file testing succeeded. I read somewhere that the command ldapsearch -x -b '' -s base '(objectclass=*)' namingContext can confirm the server is running. It appears to work: # extended LDIF # # LDAPv3 # base <> with scope baseObject # filter: (objectclass=*) # requesting: namingContext # # dn: # search result search: 2 result: 0 Success # numResponses: 2 # numEntries: 1 I'm running out of ideas. Am I missing something obvious?

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• Troubleshooting an unstable internet connection

  - by Konrad Rudolph

  My MacBook Pro running OS X (10.9, but I had the same problem before) is connected to a Belkin router via WiFi and, using Virgin Media as the ISP, to the internet. The connection is extremely unstable – on some days, I get a ping timeout every few seconds. In addition, some domains seem to suffer general connectivity issues. For instance, I often find that while the youtube.com website loads, none of the videos (which are hosted on a separate domain) do. At other times, videos load but always fail to buffer, even though the actual connection speed is ok, even though I’ve disabled dash playback. Since I’m living in a rented room and the ISP contract isn’t actually mine I’ve got only limited possibilities of addressing the problem. In particular, I have no access to the router configuration and my non tech savvy landlady, while sympathetic, is not in a great hurry to hand the problem over to the ISP’s customer support. What’s more, I seem to be the only person in the house experiencing these problems – but I can imagine that this is simply because I’m the only one who’s using the internet continuously. I’m searching for specific tests that might be able to pinpoint – and ideally solve – the problem. So far all I’ve managed to do is establish that Virgin is routing my traffic in mysterious ways. Here’s an excerpt from traceroute google.co.uk. It’s worth mentioning that the host name doesn’t seem to matter a lot, the trace route is always the same. traceroute: Warning: google.co.uk has multiple addresses; using 62.254.36.148 traceroute to google.co.uk (62.254.36.148), 64 hops max, 52 byte packets 1 (192.168.2.1) 1.112 ms 1.300 ms 2.359 ms 2 10.100.32.1 (10.100.32.1) 11.926 ms 10.217 ms 24.987 ms 3 cmbg-core-1a-ae3-610.network.virginmedia.net (80.1.202.93) 28.809 ms * 66.653 ms 4 popl-bb-1b-ae16-0.network.virginmedia.net (212.43.163.141) 13.759 ms 126.504 ms 20.472 ms 5 nrth-bb-1b-et-010-0.network.virginmedia.net (62.253.175.57) 28.357 ms 16.398 ms 42.387 ms 6 nrth-bb-1c-ae1-0.network.virginmedia.net (62.253.174.110) 27.441 ms 15.622 ms 12.044 ms 7 lutn-icdn-1-ae0-0.network.virginmedia.net (62.253.175.82) 16.678 ms 28.463 ms 28.253 ms 8 * * * 9 * * * 10 * * * ^C If I let it, this goes on until the end of time. It never seems to reach a destination. Is this normal? A friend living in the same town who is also with Virgin Media has a more conventional traceroute output: 7 hops to google.co.uk, all of which send the ICMP TIME_EXCEEDED response. The obvious fix – rebooting the router – doesn’t seem to help. As far as I can tell, the WiFi connection is stable (I can always ping the router) so the problem is further downstream. I’ve tried using an alternative DNS before (OpenDNS) but if anything, this made things worse. In fact, it made all Google services nigh unreachable.

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• Python Django sites on Apache+mod_wsgi with nginx proxy: highly fluctuating performance

  - by Halfgaar

  I have an Ubuntu 10.04 box running several dozen Python Django sites using mod_wsgi (embedded mode; the faster mode, if properly configured). Performance highly fluctuates. Sometimes fast, sometimes several seconds delay. The smokeping graphs are al over the place. Recently, I also added an nginx proxy for the static content, in the hopes it would cure the highly fluctuating performance. But, even though it reduced the number of requests Apache has to process significantly, it didn't help with the main problem. When clicking around on websites while running htop, it can be seen that sometimes requests are almost instant, whereas sometimes it causes Apache to consume 100% CPU for a few seconds. I really don't understand where this fluctuation comes from. I have configured the mpm_worker for Apache like this: StartServers 1 MinSpareThreads 50 MaxSpareThreads 50 ThreadLimit 64 ThreadsPerChild 50 MaxClients 50 ServerLimit 1 MaxRequestsPerChild 0 MaxMemFree 2048 1 server with 50 threads, max 50 clients. Munin and apache2ctl -t both show a consistent presence of workers; they are not destroyed and created all the time. Yet, it behaves as such. This tells me that once a sub interpreter is created, it should remain in memory, yet it seems sites have to reload all the time. I also have a nginx+gunicorn box, which performs quite well. I would really like to know why Apache is so random. This is a virtual host config: <VirtualHost *:81> ServerAdmin [email protected] ServerName example.com DocumentRoot /srv/http/site/bla Alias /static/ /srv/http/site/static Alias /media/ /srv/http/site/media WSGIScriptAlias / /srv/http/site/passenger_wsgi.py <Directory /> AllowOverride None </Directory> <Directory /srv/http/site> Options -Indexes FollowSymLinks MultiViews AllowOverride None Order allow,deny allow from all </Directory> Ubuntu 10.04 Apache 2.2.14 mod_wsgi 2.8 nginx 0.7.65 Edit: I've put some code in the settings.py file of a site that writes the date to a tmp file whenever it's loaded. I can now see that the site is not randomly reloaded all the time, so Apache must be keeping it in memory. So, that's good, except it doesn't bring me closer to an answer... Edit: I just found an error that might also be related to this: File "/usr/lib/python2.6/subprocess.py", line 633, in __init__ errread, errwrite) File "/usr/lib/python2.6/subprocess.py", line 1049, in _execute_child self.pid = os.fork() OSError: [Errno 12] Cannot allocate memory The server has 600 of 2000 MB free, which should be plenty. Is there a limit that is set on Apache or WSGI somewhere?

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• The Koyal Group Info Mag News¦Charged building material could make the renewable grid a reality

  - by Chyler Tilton

  What if your cell phone didn’t come with a battery? Imagine, instead, if the material from which your phone was built was a battery. The promise of strong load-bearing materials that can also work as batteries represents something of a holy grail for engineers. And in a letter published online in Nano Letters last week, a team of researchers from Vanderbilt University describes what it says is a breakthrough in turning that dream into an electrocharged reality. The researchers etched nanopores into silicon layers, which were infused with a polyethylene oxide-ionic liquid composite and coated with an atomically thin layer of carbon. In doing so, they created small but strong supercapacitor battery systems, which stored electricity in a solid electrolyte, instead of using corrosive chemical liquids found in traditional batteries. These supercapacitors could store and release about 98 percent of the energy that was used to charge them, and they held onto their charges even as they were squashed and stretched at pressures up to 44 pounds per square inch. Small pieces of them were even strong enough to hang a laptop from—a big, fat Dell, no less. Although the supercapacitors resemble small charcoal wafers, they could theoretically be molded into just about any shape, including a cell phone’s casing or the chassis of a sedan. They could also be charged—and evacuated of their charge—in less time than is the case for traditional batteries. “We’ve demonstrated, for the first time, the simple proof-of-concept that this can be done,” says Cary Pint, an assistant professor in the university’s mechanical engineering department and one of the authors of the new paper. “Now we can extend this to all kinds of different materials systems to make practical composites with materials specifically tailored to a host of different types of applications. We see this as being just the tip of a very massive iceberg.” Pint says potential applications for such materials would go well beyond “neat tech gadgets,” eventually becoming a “transformational technology” in everything from rocket ships to sedans to home building materials. “These types of systems could range in size from electric powered aircraft all the way down to little tiny flying robots, where adding an extra on-board battery inhibits the potential capability of the system,” Pint says. And they could help the world shift to the intermittencies of renewable energy power grids, where powerful batteries are needed to help keep the lights on when the sun is down or when the wind is not blowing. “Using the materials that make up a home as the native platform for energy storage to complement intermittent resources could also open the door to improve the prospects for solar energy on the U.S. grid,” Pint says. “I personally believe that these types of multifunctional materials are critical to a sustainable electric grid system that integrates solar energy as a key power source.”

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• Unable to connect to SVN server on VPS : Subversion Configuration Problem

  - by Pritam Barhate

  Hello everybody, I purchased a VPS account (centos-5-x86_64) from Hostgator mainly for the purpose of setting up an online Subversion Server. This is the first time I am managing a VPS and my linux skills are not so great, but I have basic knowledge of the OS and have been using it on and off as desktop from last few years. So after foxing through a few tutorials online, as the first step I logged in using SSH root account provided by Hostgator and tried to run, yum install mod_dav_svn subversion As it turns out my account has Cpanel/WHM and since it some concept of easy apache straight forward procedure of yum install mod_dav_svn subversion won't work. After that I found out how it can be worked out by compiling the source and stuff. But the whole procedure looked long and scary. [I am just a linux nub]. so I decided I would just skip whole apache integration stuff and just access the server using svn:// protocol, anyways that's how I configure svn on our LAN. So I installed subversion using yum install subversion It installed fine. Then I created a folder /svn_repos/testproject and ran svnadmin create /svn_repos/testproject/ No Problems Using vi I changed svnserve.conf and passwd files for the repository and added a user with my name. Anonymous users don't have any access, authenticated users have write access. Then I started svnserve using svnserve -d then in same terminal window svn list svn://localhost/svn_repos/testproject Asks for authentication for realm, provided root password then for svn username and password. Provided both. The command returns nothing but exists properly. Returns nothing is understood I didn't import anything. But if try to access svn remotely using in another terminal: svn list svn://ip.add.of.server/svn_repos/testproject svn: Can't connect to host 'ip.add.of.server': Operation timed out Is what I get. Parallels Power Panel that I got from Hostgator reports that: The firewall is not active now. To activate the firewall, choose one of the firewall operation modes. So if firewall is not running and I can access svn using localhost, why the operation is timing out when I try to access svn from a remote machine? Experienced network admins please help. Thanks in advance. Also please suggest a good book which gives detailed information on configuring Dedicated servers + WHM and CPanel.

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• How to stop a random ramp in FCGI Processes Killing the server

  - by Andy Main

  So got the below earlier to day... Around that time the logs show a ramp in processes(600) and associated memory (1.2g), cpu usage load average (80) untill the server gave out. Server had to be hard reset by host as there was no ssh or plesk panel access. Fast CGI is configured as below and is setup for one high use site. As I understand it FcgidMaxProcesses 20 should protect against what happen but has not. I've read many forums with differing answers and references to many different fcgi directives, but have found nothing conclusive. Any one got some definitive answers on how to stop this sort of server process ramping and subsequent server failure? If you need more info let me know. Cheers Andy  /var/log/apache2/error_log [Thu May 17 07:40:47 2012] [warn] mod_fcgid: process 17651 graceful kill fail, sending SIGKILL [Thu May 17 07:40:47 2012] [warn] mod_fcgid: process 17650 graceful kill fail, sending SIGKILL [Thu May 17 07:40:47 2012] [warn] mod_fcgid: process 17649 graceful kill fail, sending SIGKILL [Thu May 17 07:40:47 2012] [warn] mod_fcgid: process 17644 graceful kill fail, sending SIGKILL [Thu May 17 07:40:47 2012] [warn] mod_fcgid: process 17643 graceful kill fail, sending SIGKILL [Thu May 17 07:40:47 2012] [warn] mod_fcgid: process 17638 graceful kill fail, sending SIGKILL [Thu May 17 07:40:47 2012] [warn] mod_fcgid: process 17633 graceful kill fail, sending SIGKILL [Thu May 17 07:40:47 2012] [warn] mod_fcgid: process 17627 graceful kill fail, sending SIGKILL [Thu May 17 07:40:47 2012] [warn] mod_fcgid: process 17622 graceful kill fail, sending SIGKILL [Thu May 17 07:40:51 2012] [warn] mod_fcgid: process 17674 graceful kill fail, sending SIGKILL [Thu May 17 07:40:51 2012] [warn] mod_fcgid: process 17673 graceful kill fail, sending SIGKILL [Thu May 17 07:40:51 2012] [warn] mod_fcgid: process 17672 graceful kill fail, sending SIGKILL [Thu May 17 07:40:51 2012] [warn] mod_fcgid: process 17667 graceful kill fail, sending SIGKILL [Thu May 17 07:40:51 2012] [warn] mod_fcgid: process 17666 graceful kill fail, sending SIGKILL [Thu May 17 07:40:51 2012] [warn] mod_fcgid: process 17665 graceful kill fail, sending SIGKILL [Thu May 17 07:40:51 2012] [warn] mod_fcgid: process 17664 graceful kill fail, sending SIGKILL [Thu May 17 07:40:51 2012] [warn] mod_fcgid: process 17659 graceful kill fail, sending SIGKILL [Thu May 17 07:40:51 2012] [warn] mod_fcgid: process 17658 graceful kill fail, sending SIGKILL [Thu May 17 07:40:51 2012] [warn] mod_fcgid: process 17657 graceful kill fail, sending SIGKILL [Thu May 17 07:40:51 2012] [warn] mod_fcgid: process 17656 graceful kill fail, sending SIGKILL [Thu May 17 07:40:51 2012] [warn] mod_fcgid: process 17651 graceful kill fail, sending SIGKILL https://docs.google.com/a/thesugarrefinery.com/open?id=0B_XbpWChge0VRmFLWEZfR2VBb2M https://docs.google.com/a/thesugarrefinery.com/open?id=0B_XbpWChge0VWTcwZEhoV2Fqejg https://docs.google.com/a/thesugarrefinery.com/open?id=0B_XbpWChge0VUUtVWWFINHZjZ0U https://docs.google.com/a/thesugarrefinery.com/open?id=0B_XbpWChge0VZEVMclh6ZUdaOUE <IfModule mod_fcgid.c> <IfModule !mod_fastcgi.c> AddHandler fcgid-script fcg fcgi fpl </IfModule> FcgidIPCDir /var/lib/apache2/fcgid/sock FcgidProcessTableFile /var/lib/apache2/fcgid/shm FcgidIdleTimeout 40 FcgidProcessLifeTime 30 FcgidMaxProcesses 20 FcgidMaxProcessesPerClass 20 FcgidMinProcessesPerClass 0 FcgidConnectTimeout 30 FcgidIOTimeout 120 FcgidInitialEnv RAILS_ENV production FcgidIdleScanInterval 10 FcgidMaxRequestLen 1073741824 </IfModule>

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• HOSTS ignored when disconnected [closed]

  - by Synetech

  Problem I’m seeing a strange and extremely frustrating problem. Any system that is not connect to the Internet (Windows 7 shows the no Internet access icon because it cannot constantly ping Microsoft’s servers) cannot even access locally hosted servers. Hypothesis The problem appears to be that the HOSTS file is not being used to resolve DNS entries when there are no active NICs. Tests / Reproduction You can reproduce it as so: Disconnect a system from the Internet (make sure all wired and wireless connections are disconnected). If necessary, add an entry to the HOSTS file (e.g., 127.0.0.1 foobar or 127.0.0.1 foobar.com) Open a command-prompt Type ping foobar or ping foobar.com Observations The screenshots below show a clear and demonstrative example. In the first snap, a laptop is connected to a router wirelessly. The HOSTS file has only three entries and they resolve just fine. In the second snap, the wireless radio is turned off, so the entries in the HOSTS file are ignored. Moreover, notice that pinging localhost still works even without any active NICs (as does 127.0.0.1), but it is using the IPv6 address (must be hard-coded). You can see the same results in Windows XP with no IPv6 installed, so it has nothing to do with IPv6. I tried pining what should have resolved to 127.0.0.1 while the desktop system (with no wireless NICs) was connected via its Ethernet adapter, then again after pulling the cable from the router and waiting a couple of seconds, then again after plugging the cable back in. The same thing happens if instead of pulling out the cable, the NIC is disabled through software (the [Disable] button in the NIC’s Status dialog or via Device Manager). Conclusions It looks as though the HOSTS file is only being read and used if there is an active NIC, otherwise it is being ignored. This makes some sense in that if there are no active network adapters, then presumably there will not be any network activity, and thus no need to resolve host names via the HOSTS file. This assumption is specious however because it precludes locally hosted virtual servers. The HOSTS file should be used regardless of external DNS server connectivity, otherwise you cannot use simple/consistent/testing-production names for locally hosted servers when not connected to the Internet (for example web servers; help servers for Visual Studio, 3dsmax, etc.; and so on). Question Does anyone know how to force Windows to use the HOSTS file even if there are no active NICs? Appendix Figure 1: While the wireless NIC is connected to the router (the cable-modem is in standby, so no external Internet connectivity). Figure 2: With the wireless radio turned off (the Ethernet port is not unconnected in both cases). Figure 3: Same results in XP with no IPv6

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• Network Bridging for WiFi-to-Ethernet in linux

  - by shakaran

  It is possible Network Bridging for WiFi-to-Ethernet in linux instead of Ethernet-to-Ethernet? I have a CentOS 6.3 machine. I am using KVM and I want perform a brigde for virtualize more machines. This machine is connected only via wireless connection and it doesn't have a ethernet connection. So, I did a bridge over the WiFi interface like: # cat /etc/sysconfig/network-scripts/ifcfg-br0 DEVICE="br0" NM_CONTROLLED="yes" ONBOOT=yes TYPE=Bridge BOOTPROTO=none IPADDR=192.168.1.50 PREFIX=24 GATEWAY=192.168.1.1 DNS1=8.8.8.8 DNS2=8.8.4.4 DEFROUTE=yes IPV4_FAILURE_FATAL=yes IPV6INIT=no NAME="System br0" Then I edit my wireless conection like: # cat /etc/sysconfig/network-scripts/ifcfg-mywireless ESSID="mywireless" MODE=Managed KEY_MGMT=WPA-PSK WPA_ALLOW_WPA2=yes CIPHER_PAIRWISE=CCMP CIPHER_GROUP=CCMP TYPE=Wireless #BOOTPROTO=none #IPADDR=192.168.1.50 #PREFIX=24 #GATEWAY=192.168.1.1 #DNS1=8.8.8.8 #DNS2=8.8.4.4 DEFROUTE=yes IPV4_FAILURE_FATAL=yes IPV6INIT=no NAME="Auto mywireless" UUID=874***** ONBOOT=yes LAST_CONNECT=1355923469 BRIDGE=br0 After, I restart the network: # /etc/init.d/network restart Shutting down loopback interface: [ OK ] Bringing up loopback interface: [ OK ] Bringing up interface Auto_mywireless: Error: Unknown connection: 874***** [FAILED] Bringing up interface br0: [ OK ] But as you can see, it show a error. My ifconfig output shows now: # ifconfig br0 Link encap:Ethernet HWaddr 6E:20:AD:CE:D8:AB inet addr:192.168.1.50 Bcast:192.168.1.255 Mask:255.255.255.0 inet6 addr: fe80::6c20:adff:fece:d8ab/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:67 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:0 (0.0 b) TX bytes:6393 (6.2 KiB) lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:16436 Metric:1 RX packets:432 errors:0 dropped:0 overruns:0 frame:0 TX packets:432 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:62433 (60.9 KiB) TX bytes:62433 (60.9 KiB) ra0 Link encap:Ethernet HWaddr 00:22:F7:2B:87:E5 inet addr:192.168.1.42 Bcast:192.168.1.255 Mask:255.255.255.0 inet6 addr: fe80::222:f7ff:fe2b:87e5/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:0 errors:46 dropped:0 overruns:0 frame:0 TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:487894880 (465.2 MiB) TX bytes:148136473 (141.2 MiB) virbr0 Link encap:Ethernet HWaddr 52:54:00:5B:30:9A inet addr:192.168.122.1 Bcast:192.168.122.255 Mask:255.255.255.0 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:70 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:0 (0.0 b) TX bytes:5838 (5.7 KiB) But this doesn't give internet connection and I loss access to 192.168.1.50. So, it is possible setup this networking bridge WiFi-to-Ethernet?

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• Setting up Virtual Hosts with Apache on Windows 2008 server for multiple sites. Complicated setup,

  - by Roeland

  Hey guys! I am setting up apache on my windows 2008 server at my home. It will serve 2 functions. Subversion hosting to allow me and some others to manage company documents with version control Local website hosting for web development. Will need to run several websites since I generally work on more then one site at a time. Heres what I have done so far. I set up subversion and apache 2.2 using some walk troughs. I changed the default port to 1337. (im a nerd) Using dyndns.com I created a domain to forward to my home ip which is dynamic. ( company.gotdns.org) I then went into my DNS for my company.com and added a record to point repo.company.com to company.gotdns.org At this point people who need access to my file repository can access by going to repo.company.com/repo which is good so far. My question comes on the next step, setting up virtual hosts with apache. Ideally I would like to have my local website be viewable by some others in the company from their homes. So, say I am working on site1, I would like to have them be able to view this by going site1.roeland.bythepixel.com. At the same time, I would like to have site10.wouter.bythepixel.com go to his local setup for site10. What I have done for this: I went into my DNS for company.com and added a record to point roeland.company.com to company.gotdns.org (which translates to my ip). I added code to my httpd-vhosts.conf (listed at bottom) I added code to my host file (listed at bottom) Hah, so of course this doenst work as excepted.. going to site1.roeland.bythepixel.com doesnt bring up my test1 site. Could anyone point me where I may be going wrong? Thanks! hosts: 127.0.0.1 localhost 127.0.0.1 sensenich.roeland.bythepixel.com ::1 localhost httpd-vhosts.conf: <VirtualHost *:80> ServerAdmin [email protected] DocumentRoot "F:/Current Projects/sensenich.com" ServerName sensenich.roeland.bythepixel.com ErrorLog "logs/sensenich.roeland.bythepixel.com-error.log" CustomLog "logs/sensenich.roeland.bythepixel.com-access.log" common </VirtualHost>

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• Asterisk Outgoing CDR Logging To Mysql

  - by user3295551

  Trying to utilize the cdr logging (to mysql) using custom fields. The problem I am facing is only when an outbound call is placed, during inbound calls the custom field I am able to log no problem. The reason I am having an issue is because the custom cdr field I need is a unique value for each user on the system. sip.conf ... ... [sales_department](!) type=friend host=dynamic context=SalesAgents disallow=all allow=ulaw allow=alaw qualify=yes qualifyfreq=30 ;; company sales agents: [11](sales_agent) secret=xxxxxx callerid="<...>" [12](sales_agent) secret=xxxxxx callerid="<...>" [13](sales_agent) secret=xxxxxx callerid="<...>" [14](sales_agent) secret=xxxxxx callerid="<...>" extensions.conf [SalesAgents] include => Services ; Outbound calls exten=>_1NXXNXXXXXX,1,Dial(SIP/${EXTEN}@myprovider) ; Inbound calls exten=>100,1,NoOp() same => n,Set(CDR(agent_id)=11) same => n,CELGenUserEvent(Custom Event) same => n,Dial(${11_1},25) same => n,GotoIf($["${DIALSTATUS}" = "BUSY"]?busy:unavail) same => n(unavail),VoiceMail(11@asterisk) same => n,Hangup() same => n(busy),VoiceMail(11@asterisk) same => n,Hangup() exten=>101,1,NoOp() same => n,Set(CDR(agent_id)=12) same => n,CELGenUserEvent(Custom Event) same => n,Dial(${12_1},25) same => n,GotoIf($["${DIALSTATUS}" = "BUSY"]?busy:unavail) same => n(unavail),VoiceMail(12@asterisk) same => n,Hangup() same => n(busy),VoiceMail(12@asterisk) same => n,Hangup() ... ... For the inbound section of the dialplan in the above example I am able to insert the custom cdr field (agent_id). But above it you can see for the Oubound section of the dialplan I have been stumped on how I would be able to tell the dialplan which agent_id is making the outbound call. My Question: how to take the agent_id=[11] & agent_id=[12] and agent_id=[13] and agent_id=[14] etc and use that as a custom field for cdr on outbound calls?

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• Connecting to localhost resolves 127.0.0.1 but connects with external IP [Linux, Debian]

  - by skgsergio

  I'm having a problem with a dedicated server, I don't known if it's the default behavior but this is the problem: If I connect to a service located on the server with localhost the service gets as source IP the external IP. Let me show an example, I use netcat for listening on 127.0.0.1:4444 xxxxxx # nc -vv -l -s 127.0.0.1 -p 4444 listening on [127.0.0.1] 4444 ... Lets check if it's ok: xxxxxx ~ # netstat -atnp | grep 4444 tcp 0 0 127.0.0.1:4444 0.0.0.0:* LISTEN 14038/nc Ok lets connect: xxxxxx ~ # nc -vv 127.0.0.1 4444 localhost [127.0.0.1] 4444 (?) open Return to the tty that have the listening process and I get this: connect to [127.0.0.1] from xxxxxx.net [176.31.xxx.xx] 50354 So that's the problem. I have a server daemon that have to listen on localhost and checks that the ip is 127.0.0.1 when the client connects but for some reason when I connect to localhost it reports the external ip... If I do the same with IPv6 it works as excepted... Detects connection as localhost (::1). Some info that can be useful: "localhost" resolves without problems to 127.0.0.1 xxxxxx ~ # ping -c1 localhost PING localhost (127.0.0.1) 56(84) bytes of data. 64 bytes from localhost (127.0.0.1): icmp_req=1 ttl=64 time=0.086 ms Nothing weird on my hosts file, I think... xxxxxx ~ # grep -v ^# /etc/hosts 127.0.0.1 localhost localhost.localdomain 176.31.xxx.xx xxxxxx.net ns1.xxxxxx.net ::1 ip6-localhost ip6-loopback feo0::0 ip6-localnet ff00::0 ip6-mcastprefix ff02::1 ip6-allnodes ff02::2 ip6-allrouters ff02::3 ip6-allhosts And ifconfig reports all ok... eth0 Link encap:Ethernet HWaddr e0:69:95:d8:30:a1 inet addr:176.31.xxx.xx Bcast:176.31.108.255 Mask:255.255.255.0 inet6 addr: 2001:41d0:8:xxxx::/64 Scope:Global inet6 addr: 2001:41d0:8:xxxx:x:xx:xx:xx/64 Scope:Global inet6 addr: fe80::e269:95ff:fed8:30a1/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:16916 errors:0 dropped:0 overruns:0 frame:0 TX packets:16914 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:8410679 (8.0 MiB) TX bytes:10539881 (10.0 MiB) Interrupt:28 Base address:0xe000 lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:16436 Metric:1 RX packets:5570 errors:0 dropped:0 overruns:0 frame:0 TX packets:5570 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:744490 (727.0 KiB) TX bytes:744490 (727.0 KiB)

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• ubuntu eth0 not reconnecting after cable unplugged

  - by Alex

  I'm running kubuntu 9.10 w/ gnome, I have a static IP defined in /etc/network/interfaces When I unplugged my network cable and rebooted, then reconnected the network cable I was not able to connect. I tried using sudo ifup eth0, and then ifconfig and it seemed as though the IP address had been assigned and I was connected, but I wasn't. I then did ifdown eth0, and again ifup eth0. For some reason I'm not able to access the network. Furthermore, I also attempted to connect via wlan, and was able to connect to the wireless network, but cannot "see" the network. I can't transfer data or access the internet or anything on the network including the router. How do I resolve this? topsy@monolyth:~$ ifconfig eth0 Link encap:Ethernet HWaddr 00:1c:25:1c:df:70 inet addr:192.168.1.145 Bcast:192.168.1.255 Mask:255.255.255.0 inet6 addr: fe80::21c:25ff:fe1c:df70/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:5720 errors:0 dropped:0 overruns:0 frame:0 TX packets:565 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:100 RX bytes:378035 (378.0 KB) TX bytes:46832 (46.8 KB) Memory:fe000000-fe020000 lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:16436 Metric:1 RX packets:4 errors:0 dropped:0 overruns:0 frame:0 TX packets:4 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:240 (240.0 B) TX bytes:240 (240.0 B) By access the network I mean the local network as well as the internet. topsy@monolyth:~$ ping 192.168.1.1 PING 192.168.1.1 (192.168.1.1) 56(84) bytes of data. 64 bytes from 192.168.1.1: icmp_seq=1 ttl=64 time=9.14 ms 64 bytes from 192.168.1.1: icmp_seq=2 ttl=64 time=1.24 ms 64 bytes from 192.168.1.1: icmp_seq=3 ttl=64 time=1.01 ms 64 bytes from 192.168.1.1: icmp_seq=4 ttl=64 time=1.00 ms [snip... all OK, icmp_seq from 5-30, time between 0.981-1.25ms] ^C --- 192.168.1.1 ping statistics --- 30 packets transmitted, 30 received, 0% packet loss, time 29035ms rtt min/avg/max/mdev = 0.971/1.300/9.140/1.458 ms topsy@monolyth:~$ route Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 192.168.1.0 * 255.255.255.0 U 0 0 0 eth0 link-local * 255.255.0.0 U 1000 0 0 eth0 default 192.168.1.1 0.0.0.0 UG 100 0 0 eth0 root@monolyth:~# cat /etc/resolv.conf # Generated by NetworkManager

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• VPN Connection causes DNS to use wrong DNS server

  - by Bryan

  I have a Windows 7 PC on our company network (which is a member of our Active Directory). Everything works fine until I open a VPN connection to a customer's site. When I do connect, I lose network access to shares on the network, including directories such as 'Application Data' that we have a folder redirection policy for. As you can imagine, this makes working on the PC very difficult, as desktop shortcuts stop working, software stops working properly due to having 'Application Data' pulled from under it. Our network is routed (10.58.5.0/24), with other local subnets existing within the scope of 10.58.0.0/16. The remote network is on 192.168.0.0/24. I've tracked the issue down to being DNS related. As soon as I open the VPN tunnel, all my DNS traffic goes via the remote network, which explains the loss of local resources, but my question is, how can I force local DNS queries to go to our local DNS servers rather than our customers? The output of ipconfig /all when not connected to the VPN is below: Windows IP Configuration Host Name . . . . . . . . . . . . : 7k5xy4j Primary Dns Suffix . . . . . . . : mydomain.local Node Type . . . . . . . . . . . . : Hybrid IP Routing Enabled. . . . . . . . : No WINS Proxy Enabled. . . . . . . . : No DNS Suffix Search List. . . . . . : mydomain.local Ethernet adapter Local Area Connection: Connection-specific DNS Suffix . : mydomain.local Description . . . . . . . . . . . : Broadcom NetLink (TM) Gigabit Ethernet Physical Address. . . . . . . . . : F0-4D-A2-DB-3B-CA DHCP Enabled. . . . . . . . . . . : Yes Autoconfiguration Enabled . . . . : Yes Link-local IPv6 Address . . . . . : fe80::9457:c5e0:6f10:b298%10(Preferred) IPv4 Address. . . . . . . . . . . : 10.58.5.89(Preferred) Subnet Mask . . . . . . . . . . . : 255.255.255.0 Lease Obtained. . . . . . . . . . : 31 January 2012 15:55:47 Lease Expires . . . . . . . . . . : 10 February 2012 10:11:30 Default Gateway . . . . . . . . . : 10.58.5.1 DHCP Server . . . . . . . . . . . : 10.58.3.32 DHCPv6 IAID . . . . . . . . . . . : 250629538 DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-14-AC-76-2D-F0-4D-A2-DB-3B-CA DNS Servers . . . . . . . . . . . : 10.58.3.32 10.58.3.33 NetBIOS over Tcpip. . . . . . . . : Enabled This is the output of the same command with the VPN tunnel connected: Windows IP Configuration Host Name . . . . . . . . . . . . : 7k5xy4j Primary Dns Suffix . . . . . . . : mydomain.local Node Type . . . . . . . . . . . . : Hybrid IP Routing Enabled. . . . . . . . : No WINS Proxy Enabled. . . . . . . . : No DNS Suffix Search List. . . . . . : mydomain.local PPP adapter Customer Domain: Connection-specific DNS Suffix . : customerdomain.com Description . . . . . . . . . . . : CustomerDomain Physical Address. . . . . . . . . : DHCP Enabled. . . . . . . . . . . : No Autoconfiguration Enabled . . . . : Yes IPv4 Address. . . . . . . . . . . : 192.168.0.85(Preferred) Subnet Mask . . . . . . . . . . . : 255.255.255.255 Default Gateway . . . . . . . . . : DNS Servers . . . . . . . . . . . : 192.168.0.16 192.168.0.17 Primary WINS Server . . . . . . . : 192.168.0.17 NetBIOS over Tcpip. . . . . . . . : Disabled Ethernet adapter Local Area Connection: Connection-specific DNS Suffix . : mydomain.local Description . . . . . . . . . . . : Broadcom NetLink (TM) Gigabit Ethernet Physical Address. . . . . . . . . : F0-4D-A2-DB-3B-CA DHCP Enabled. . . . . . . . . . . : Yes Autoconfiguration Enabled . . . . : Yes Link-local IPv6 Address . . . . . : fe80::9457:c5e0:6f10:b298%10(Preferred) IPv4 Address. . . . . . . . . . . : 10.58.5.89(Preferred) Subnet Mask . . . . . . . . . . . : 255.255.255.0 Lease Obtained. . . . . . . . . . : 31 January 2012 15:55:47 Lease Expires . . . . . . . . . . : 10 February 2012 10:11:30 Default Gateway . . . . . . . . . : 10.58.5.1 DHCP Server . . . . . . . . . . . : 10.58.3.32 DHCPv6 IAID . . . . . . . . . . . : 250629538 DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-14-AC-76-2D-F0-4D-A2-DB-3B-CA DNS Servers . . . . . . . . . . . : 10.58.3.32 10.58.3.33 NetBIOS over Tcpip. . . . . . . . : Enabled Routing table Network Destination Netmask Gateway Interface Metric 0.0.0.0 0.0.0.0 10.58.5.1 10.58.5.89 20 10.58.5.0 255.255.255.0 On-link 10.58.5.89 276 10.58.5.89 255.255.255.255 On-link 10.58.5.89 276 10.58.5.255 255.255.255.255 On-link 10.58.5.89 276 91.194.153.42 255.255.255.255 10.58.5.1 10.58.5.89 21 127.0.0.0 255.0.0.0 On-link 127.0.0.1 306 127.0.0.1 255.255.255.255 On-link 127.0.0.1 306 127.255.255.255 255.255.255.255 On-link 127.0.0.1 306 192.168.0.0 255.255.255.0 192.168.0.95 192.168.0.85 21 192.168.0.85 255.255.255.255 On-link 192.168.0.85 276 224.0.0.0 240.0.0.0 On-link 127.0.0.1 306 224.0.0.0 240.0.0.0 On-link 10.58.5.89 276 224.0.0.0 240.0.0.0 On-link 192.168.0.85 276 255.255.255.255 255.255.255.255 On-link 127.0.0.1 306 255.255.255.255 255.255.255.255 On-link 10.58.5.89 276 255.255.255.255 255.255.255.255 On-link 192.168.0.85 276 The binding order for the interfaces is as follows: I've not configured the VPN tunnel to use the default gateway at the remote end, and network comms to nodes on both networks are fine. (i.e. I can ping any node on our network or the remote network). I've modified the PPTP connection properties to use the DNS servers 10.58.3.32 followed by 192.168.0.16, yet the query still goes to 192.168.0.16. Edit: The local resources that disappear are hosted on domain DFS roots, which might (or might not) be relevant.

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• postfix error: open database /var/lib/mailman/data/aliases.db: No such file

  - by Thufir

  In trying to follow the Ubuntu guide for postfix and mailman, I do not understand these directions: This build of mailman runs as list. It must have permission to read /etc/aliases and read and write /var/lib/mailman/data/aliases. Do this with these commands: sudo chown root:list /var/lib/mailman/data/aliases sudo chown root:list /etc/aliases Save and run: sudo newaliases I'm getting this kind of error: root@dur:~# root@dur:~# root@dur:~# telnet localhost 25 Trying 127.0.0.1... Connected to localhost. Escape character is '^]'. 220 dur.bounceme.net ESMTP Postfix (Ubuntu) ehlo dur 250-dur.bounceme.net 250-PIPELINING 250-SIZE 10240000 250-VRFY 250-ETRN 250-STARTTLS 250-ENHANCEDSTATUSCODES 250-8BITMIME 250 DSN quit 221 2.0.0 Bye Connection closed by foreign host. root@dur:~# root@dur:~# tail /var/log/mail.log Aug 28 01:16:43 dur postfix/master[19444]: terminating on signal 15 Aug 28 01:16:43 dur postfix/postfix-script[19558]: starting the Postfix mail system Aug 28 01:16:43 dur postfix/master[19559]: daemon started -- version 2.9.1, configuration /etc/postfix Aug 28 01:16:45 dur postfix/postfix-script[19568]: stopping the Postfix mail system Aug 28 01:16:45 dur postfix/master[19559]: terminating on signal 15 Aug 28 01:16:45 dur postfix/postfix-script[19673]: starting the Postfix mail system Aug 28 01:16:45 dur postfix/master[19674]: daemon started -- version 2.9.1, configuration /etc/postfix Aug 28 01:17:22 dur postfix/smtpd[19709]: error: open database /var/lib/mailman/data/aliases.db: No such file or directory Aug 28 01:17:22 dur postfix/smtpd[19709]: connect from localhost[127.0.0.1] Aug 28 01:18:37 dur postfix/smtpd[19709]: disconnect from localhost[127.0.0.1] root@dur:~# root@dur:~# postconf -n alias_database = hash:/etc/aliases alias_maps = hash:/etc/aliases, hash:/var/lib/mailman/data/aliases append_dot_mydomain = no biff = no broken_sasl_auth_clients = yes config_directory = /etc/postfix default_transport = smtp home_mailbox = Maildir/ inet_interfaces = loopback-only mailbox_command = /usr/lib/dovecot/deliver -c /etc/dovecot/conf.d/01-mail-stack-delivery.conf -m "${EXTENSION}" mailbox_size_limit = 0 mailman_destination_recipient_limit = 1 mydestination = dur, dur.bounceme.net, localhost.bounceme.net, localhost myhostname = dur.bounceme.net mynetworks = 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128 readme_directory = no recipient_delimiter = + relay_domains = lists.dur.bounceme.net relay_transport = relay relayhost = smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache smtp_use_tls = yes smtpd_banner = $myhostname ESMTP $mail_name (Ubuntu) smtpd_recipient_restrictions = reject_unknown_sender_domain, reject_unknown_recipient_domain, reject_unauth_pipelining, permit_mynetworks, permit_sasl_authenticated, reject_unauth_destination smtpd_sasl_auth_enable = yes smtpd_sasl_authenticated_header = yes smtpd_sasl_local_domain = $myhostname smtpd_sasl_path = private/dovecot-auth smtpd_sasl_security_options = noanonymous smtpd_sasl_type = dovecot smtpd_tls_auth_only = yes smtpd_tls_cert_file = /etc/ssl/certs/ssl-mail.pem smtpd_tls_key_file = /etc/ssl/private/ssl-mail.key smtpd_tls_mandatory_ciphers = medium smtpd_tls_mandatory_protocols = SSLv3, TLSv1 smtpd_tls_received_header = yes smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache smtpd_use_tls = yes tls_random_source = dev:/dev/urandom transport_maps = hash:/etc/postfix/transport root@dur:~# root@dur:~# And am wondering what connection might be. I do see that I don't have the requisite files: root@dur:~# root@dur:~# ll /var/lib/mailman/data/aliases ls: cannot access /var/lib/mailman/data/aliases: No such file or directory root@dur:~# At what stage were those aliases created? How can I create them? Is that what's causing the error error: open database /var/lib/mailman/data/aliases.db: No such file or directory Aug 28 01:17:22 dur postfix/smtpd[19709]: connect from localhost[127.0.0.1]?

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• Linux not picking up new partition correctly on emc pseudo device

  - by James

  Hi We have a database server running oracle rac. We were recently running out of space on the main LUN that it is attached to. I created a new 100GB LUN and concatenated this onto the existing LUN creating a new MetaLUN. After some messing I managed to get linux to recognise the new space. I then created a new partition in on the pseudo device, to use the new space. Previously when I have done this on other system the next step is to create an ASM disk on the new partition and add this disk to the oracle disk group. This however fails. I am aware of various issues with ASM and powerpath, but I don't think this is the issue here. As on while investigating the issue I discovered that one of the underlying logical device is not reflecting the size change. See below; Powermt displays all of the underlying logical units [root@XXXXX~]# powermt display dev=emcpowerd Pseudo name=emcpowerd CLARiiON ID=CKM00091500009 [VFRAC2] Logical device ID=6006016030312200787502866C65DE11 [LUN 30] state=alive; policy=CLAROpt; priority=0; queued-IOs=0 Owner: default=SP A, current=SP A Array failover mode: 1 ============================================================================== ---------------- Host --------------- - Stor - -- I/O Path - -- Stats --- ### HW Path I/O Paths Interf. Mode State Q-IOs Errors ============================================================================== 3 qla2xxx sde SP A0 active alive 0 0 3 qla2xxx sdj SP B0 active alive 0 0 4 qla2xxx sdo SP A1 active alive 0 0 4 qla2xxx sdt SP B1 active alive 0 0 Fdisk on the pseudo device shows correct space. [root@XXXXX ~]# fdisk -l /dev/emcpowerd Disk /dev/emcpowerd: 429.4 GB, 429496729600 bytes 255 heads, 63 sectors/track, 52216 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Device Boot Start End Blocks Id System /dev/emcpowerd1 1 39162 314568733+ 83 Linux /dev/emcpowerd2 39163 52216 104856255 83 Linux fdisk on one of the logical units is wrong [root@XXXXX~]# fdisk -l /dev/sde Disk /dev/sde: 322.1 GB, 322122547200 bytes 255 heads, 63 sectors/track, 39162 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Device Boot Start End Blocks Id System /dev/sde1 1 39162 314568733+ 83 Linux /dev/sde2 39163 52216 104856255 83 Linux fdisk on the rest of the units is fine [root@XXXXX ~]# fdisk -l /dev/sdj Disk /dev/sdj: 429.4 GB, 429496729600 bytes 255 heads, 63 sectors/track, 52216 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Device Boot Start End Blocks Id System /dev/sdj1 1 39162 314568733+ 83 Linux /dev/sdj2 39163 52216 104856255 83 Linux Also when I created the the partition linux did not create the any entries in the /dev directory for the second partition so I created these manually [root@XXXXX dev]# mknod sde2 b 8 66 [root@XXXXX dev]# ls -al sd[ejot]? brw-r----- 1 root disk 8, 65 Dec 29 14:20 sde1 brw-r--r-- 1 root disk 8, 66 Apr 8 20:31 sde2 brw-r----- 1 root disk 8, 145 Dec 29 14:19 sdj1 brw-r--r-- 1 root disk 8, 146 Apr 8 20:33 sdj2 brw-r----- 1 root disk 8, 225 Apr 6 23:12 sdo1 brw-r--r-- 1 root disk 8, 226 Apr 8 20:33 sdo2 brw-r----- 1 root disk 65, 49 Dec 29 14:19 sdt1 brw-r--r-- 1 root disk 65, 50 Apr 8 20:33 sdt2 This is a production server that we cannot easily reboot. Any ideas would be much appreciated. J

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• Configuring Windows 2003 As A Router

  - by Sean M

  I am trying to configure a Windows 2003 server to act as a router, so that the two subnetworks that I'm dealing with can communicate with one another without NAT. I am mostly sure that I have configured Windows 2003 incorrectly, and I'm finding it very difficult to drill down through Google results to something helpful. I have a 192.168.1.0/24 network that is my "production" network (in the sense that I'm in trouble if I screw it up) and a 10.0.0.0/8 network that is my test network. The 192.168.1.0 network is ruled by a gateway whose routing table looks like this (my address redacted): The Windows 2003 server, "prime," is multihomed. Its network adapters are at 192.168.1.122, (as seen above), 10.0.0.1, and 10.0.0.2. I added the Routing and Remote Access role to it, and enabled LAN routing. I do not have it using RIP or other routing protocols. Its current routing table is shown below. To me, it looks like all of the right routes are there for traffic to pass between the 192.168.1.0 network and the 10.0.0.0 network. However, traffic does not pass. The 10.0.0.11 and .12 clients cannot be contacted from the 192.168.1.0 network. When I use traceroute to try to get to them, the trace gets to the Windows 2003 server's 192.168.1.122 address, then produces nothing but "* * *" timeouts. When I try to traceroute to 192.168.1.1 from a 10.0.0.0-network client, I get "destination host unreachable." However, I know that the routing is working at least a little, because from the 192.168.1.0 network, I can connect to the Windows server just fine by referring to it as 10.0.0.1. What static routes would allow me to contact 10.0.0.11 and .12 from the 192.168.1.0 network? Is it possible to tell the Windows server "since you are a DHCP/DNS server, you already know routes to get to machines that are getting IP addresses from you, please add those to your routing table" ? Will using RIP or OSPF on the Windows server actually be helpful in this situation?

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• LDAP installed, running, but can't connect remotely [Ubuntu 10.10]

  - by Casey Jordan

  Hi all, I installed LDAP on my ubuntu 10.10 system, using the tutorial found here: https://help.ubuntu.com/10.10/serverguide/C/openldap-server.html Everything seems to be working well, when logged into the server via ssh I can run commands like: > ldapsearch -xLLL -b "dc=easydita,dc=com" uid=john sn givenName cn dn: uid=john,ou=people,dc=easydita,dc=com sn: Doe givenName: John cn: John Doe So I think that's a good sign that things are working well. However I have had zero luck connecting to the server remotely via GUI tools or command line. I have tied JXplorer, and LDAP administration tool. Running commands like this: > ldapsearch -xLLL -W -H ldap://ice.rit.edu -d1 "dc=easydita,dc=com" ldap_url_parse_ext(ldap://ice.rit.edu) ldap_create ldap_url_parse_ext(ldap://ice.rit.edu:389/??base) Enter LDAP Password: ldap_sasl_bind ldap_send_initial_request ldap_new_connection 1 1 0 ldap_int_open_connection ldap_connect_to_host: TCP ice.rit.edu:389 ldap_new_socket: 3 ldap_prepare_socket: 3 ldap_connect_to_host: Trying 127.0.0.1:389 ldap_pvt_connect: fd: 3 tm: -1 async: 0 ldap_open_defconn: successful ldap_send_server_request ber_scanf fmt ({it) ber: ber_scanf fmt ({i) ber: ber_flush2: 34 bytes to sd 3 ldap_result ld 0xb8940170 msgid 1 wait4msg ld 0xb8940170 msgid 1 (infinite timeout) wait4msg continue ld 0xb8940170 msgid 1 all 1 ** ld 0xb8940170 Connections: * host: ice.rit.edu port: 389 (default) refcnt: 2 status: Connected last used: Thu Mar 17 19:42:29 2011 ** ld 0xb8940170 Outstanding Requests: * msgid 1, origid 1, status InProgress outstanding referrals 0, parent count 0 ld 0xb8940170 request count 1 (abandoned 0) ** ld 0xb8940170 Response Queue: Empty ld 0xb8940170 response count 0 ldap_chkResponseList ld 0xb8940170 msgid 1 all 1 ldap_chkResponseList returns ld 0xb8940170 NULL ldap_int_select read1msg: ld 0xb8940170 msgid 1 all 1 ber_get_next ber_get_next: tag 0x30 len 16 contents: read1msg: ld 0xb8940170 msgid 1 message type bind ber_scanf fmt ({eAA) ber: read1msg: ld 0xb8940170 0 new referrals read1msg: mark request completed, ld 0xb8940170 msgid 1 request done: ld 0xb8940170 msgid 1 res_errno: 49, res_error: <>, res_matched: <> ldap_free_request (origid 1, msgid 1) ldap_parse_result ber_scanf fmt ({iAA) ber: ber_scanf fmt (}) ber: ldap_msgfree ldap_err2string ldap_bind: Invalid credentials (49) I am pretty sure that I set up the admin password correctly, but the tutorial was not very specific about that. (Also could not find instructions on how to reset admin password.) Additional info: I was told that this file might hold important information so I will post it: /etc/ldap/slapd.d/cn=config/olcDatabase={0}config.ldif dn: olcDatabase={0}config objectClass: olcDatabaseConfig olcDatabase: {0}config olcAccess: {0}to * by dn.exact=cn=localroot,cn=config manage by * break olcRootDN: cn=admin,cn=config structuralObjectClass: olcDatabaseConfig entryUUID: eca09490-e524-102f-87c5-17d7a82e8985 creatorsName: cn=config createTimestamp: 20110317205733Z entryCSN: 20110317205733.193089Z#000000#000#000000 modifiersName: cn=config modifyTimestamp: 20110317205733Z Given that it seems I have this almost set up correctly is there any steps I can take to correct this? Thanks, Casey

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• Apache + PHP in paths with accented letters

  - by Álvaro G. Vicario

  I'm not able to run a PHP enabled web site under Apache on Windows XP if the path to DOCUMENT_ROOT contains accented letters. I'm not referring to the script file names themselves but to any folder in the path components. I have this virtual host definition: <VirtualHost *:80> ServerName foo.local DocumentRoot "E:/gonzález/sites/foo" ErrorLog logs/foo.local-error.log CustomLog logs/foo.local-access.log combined <Directory "E:/gonzález/sites/foo"> AllowOverride All Options Indexes FollowSymLinks Order allow,deny Allow from all </Directory> </VirtualHost> If I save the file in ANSI I get a syntax error: DocumentRoot must be a directory If I save the file in Unicode I get another syntax error: Invalid command '\xff\xfe#', perhaps misspelled or defined by a module not included in the server configuration (looks like it's complaining about the BOM) If I save the file in BOM-less UTF-8 Apache works fine and it serves static files with no apparent issue... ... however, PHP complaints when loading any *.php file (even an empty one): Warning: Unknown: failed to open stream: No such file or directory in Unknown on line 0 Fatal error: Unknown: Failed opening required 'E:/gonzález/sites/foo/vacio.php' (include_path='.;C:\Archivos de programa\PHP\pear') in Unknown on line 0 I decided to try the 8+3 short name of the directory (just a test, I don't want to use such a workaround): <VirtualHost *:80> ServerName foo.local DocumentRoot "E:/GONZLE~1/sites/foo" ErrorLog logs/foo.local-error.log CustomLog logs/foo.local-access.log combined <Directory "E:/GONZLE~1/sites/foo"> AllowOverride All Options Indexes FollowSymLinks Order allow,deny Allow from all </Directory> </VirtualHost> But I get the same behaviour: Warning: Unknown: failed to open stream: No such file or directory in Unknown on line 0 Fatal error: Unknown: Failed opening required 'E:/gonzález/sites/foo/vacio.php' (include_path='.;C:\Archivos de programa\PHP\pear') in Unknown on line 0 While there're obvious workarounds (use plain ASCII in all directory names or create NTFS junctions to hide actual names) I can't believe that this cannot be done. Do you have more information about the subject? My specs include 32 bit Windows XP Professional SP3, Apache/2.2.13 and PHP/5.2.11 running as Apache module (but I've noticed the same issue in another box with Windows Vista and PHP/5.3.1).

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• Installing Yaws server on Ubuntu 12.04 (Using a cloud service)

  - by Lee Torres

  I'm trying to get a Yaws web server working on a cloud service (Amazon AWS). I've compilled and installed a local copy on the server. My problem is that I can't get Yaws to run while running on either port 8000 or port 80. I have the following configuration in yaws.conf: port = 8000 listen = 0.0.0.0 docroot = /home/ubuntu/yaws/www/test dir_listings = true This produces the following successful launch/result: Eshell V5.8.5 (abort with ^G) =INFO REPORT==== 16-Sep-2012::17:21:06 === Yaws: Using config file /home/ubuntu/yaws.conf =INFO REPORT==== 16-Sep-2012::17:21:06 === Ctlfile : /home/ubuntu/.yaws/yaws/default/CTL =INFO REPORT==== 16-Sep-2012::17:21:06 === Yaws: Listening to 0.0.0.0:8000 for <3> virtual servers: - http://domU-12-31-39-0B-1A-F6:8000 under /home/ubuntu/yaws/www/trial - =INFO REPORT==== 16-Sep-2012::17:21:06 === Yaws: Listening to 0.0.0.0:4443 for <1> virtual servers: - When I try to access the the url (http://ec2-72-44-47-235.compute-1.amazonaws.com), it never connects. I've tried using paping to check if port 80 or 8000 is open(http://code.google.com/p/paping/) and I get a "Host can not be resolved" error, so obviously something isn't working. I've also tried setting the yaws.conf so its at Port 80, appearing like this: port = 8000 listen = 0.0.0.0 docroot = /home/ubuntu/yaws/www/test dir_listings = true and I get the following error: =ERROR REPORT==== 16-Sep-2012::17:24:47 === Yaws: Failed to listen 0.0.0.0:80 : {error,eacces} =ERROR REPORT==== 16-Sep-2012::17:24:47 === Can't listen to socket: {error,eacces} =ERROR REPORT==== 16-Sep-2012::17:24:47 === Top proc died, terminate gserv =ERROR REPORT==== 16-Sep-2012::17:24:47 === Top proc died, terminate gserv =INFO REPORT==== 16-Sep-2012::17:24:47 === application: yaws exited: {shutdown,{yaws_app,start,[normal,[]]}} type: permanent {"Kernel pid terminated",application_controller," {application_start_failure,yaws,>>>>>>{shutdown,>{yaws_app,start,[normal,[]]}}}"} I've also opened up the port 80 using iptables. Running sudo iptables -L gives this output: Chain INPUT (policy ACCEPT) target prot opt source destination ACCEPT tcp -- ip-192-168-2-0.ec2.internal ip-192-168-2-16.ec2.internal tcp dpt:http ACCEPT tcp -- 0.0.0.0 anywhere tcp dpt:http ACCEPT all -- anywhere anywhere ctstate RELATED,ESTABLISHED ACCEPT tcp -- anywhere anywhere tcp dpt:http ACCEPT tcp -- anywhere anywhere tcp dpt:http Chain FORWARD (policy ACCEPT) target prot opt source destination Chain OUTPUT (policy ACCEPT) target prot opt source destination In addition, I've gone to the security group panel in the Amazon AWS configuration area, and add ports 80, 8000, and 8080 to ip source 0.0.0.0 Please note: if you try to access the URL of the virtual server now, it likely won't connect because I'm not running currently running the yaws daemon. I've tested it when I've run yaws either through yaws or yaws -i Thanks for the patience

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• Email delivery management grievances

  - by joxl

  The question I have may be more of principle than anything else, but here's my dilemma. I manage an email system for a small company (about 20 email users). We own a plain-letter .com domain name through Network Solutions. Our email service is hosted by Google Apps. Recently (Feb. 2011) we've been having customers report that they aren't getting our emails. Upon further investigation it seems that the failed emails are all to a common (well known) domain. We have not received any bounce messages for the emails. We've also contacted a few of the intended recipients, who have reported that the messages are not in their spam box; they simply did not receive anything. In these cases we re-sent the same email to an alternate address on another domain, which was successful received. One customer contacted their email provider about the issue. The provider recommended that we submit a form to be white-listed by their domain. Here's where my problem begins. I feel like this is heading down a slippery slope. Doesn't this undermine the very principle of email? If this is the appropriate action to take in these situations where will it end? In theory (following this model) it could be argued that eventually one will first need to "whitelist" (or more appropriately termed "authenticate") themselves with an email host before actually sending any messages. More to this point, what keeps the "bad" spammers from doing the same thing...? We've just gone full circle. I know avoiding anti-spam measures is a big cat-and-mouse game, but I think this is the wrong way of "patching" the problem. Email standards say that messages should not just disappear silently. I have a problem supporting a model that says "you must do < this to make sure your emails aren't ignored". I have a notion to call the provider and voice my complaint, although I have a feeling it will probably fall on deaf ears. Am I missing something here? Is this an acceptable approach to email spam problems? What should I do?

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