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• Pasting extended ACL contents into telnet session to Cisco Router SIM

  - by Kyle Brandt

  I have a telnet session to a dynamips router sim. When I try to paste the contents of an actually working ACL retrieved from 'show run' into the access list, only part of gets pasted. The session is something like: enable conf t ip access-list extended Internet <PASTE of Rules> It stops right in the middle of a line: permit tcp any host 123.123.123.123 gt 1 ! should be gt 1023 Anyone know what is happening? The source is an extended access list.

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• Bridge virtual machines out WLAN interface

  - by Thomas

  It seems that my wlan card (intel 5100 AGN) firmware doesn't allow "spoofing" MAC addresses. This has the side effect of destroying the capability to bridge out my virtual machines on that interface. Apparently this is a common thing on wlan cards. I can see the incoming traffic just fine in my virtual machines, but their DHCP queries don't get bridged out of the WLAN card. It works perfectly well when using the wired ethernet port. Is there a workaround for this? MAC-NAT or something? I don't want to route my virtual machines out to the Internet because I don't want my host OS to even have an IP address. I'm using Linux and KVM for virtualization.

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• Dovecot not working pop3 with postfix

  - by samer na

  $ telnet localhost pop3 Trying ::1... Trying 127.0.0.1... telnet: Unable to connect to remote host: Connection refused $ netstat -l tcp 0 0 *:www : LISTEN tcp 0 0 localhost.localdoma:ipp : LISTEN tcp 0 0 *:smtp : LISTEN tcp 0 0 localhost.localdo:mysql : LISTEN and nothing about dovecot in mail.log or mail.err when I run this service dovecot start I got start: Rejected send message, 1 matched rules; type="method_call", sender=":1.553" (uid=1000 pid=26250 comm="start) interface="com.ubuntu.Upstart0_6.Job" member="Start" error name="(unset)" requested_reply=0 destination="com.ubuntu.Upstart" (uid=0 pid=1 comm="/sbin/init")) in dovecot.conf protocols = imap imaps pop3 pop3s disable_plaintext_auth = no log_timestamp = "%Y-%m-%d %H:%M:%S " mail_location = maildir:/var/spool/mail/%d/%n mail_access_groups = mail first_valid_uid = 106 first_valid_gid = 106 protocol imap { } protocol pop3 { listen=*:110 pop3_uidl_format = %08Xu%08Xv } protocol lda { postmaster_address = [email protected] mail_plugins = quota log_path = /var/log/dovecot-deliver.log info_log_path = /var/log/dovecot-deliver.log } auth default { mechanisms = digest-md5 plain passdb sql { args = /etc/dovecot/dovecot-mysql.conf } userdb sql { args = /etc/dovecot/dovecot-mysql.conf } user = root }

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• How many virtual processors or cores should I assign to my Guest OS?

  - by reidLinden

  I've just received an upgraded Host machine, and am looking to push some of those advances to my workstations Guest OS(s). In particular, I used to have a single processor, with 2 cores, so my Guest OS only had 1/1. Now, I've got a single processor with 8 cores, so I'm curious about what would be recommended for my Guest OS now? 1 processor/4 cores? 2 processors/2 cores? 4 processors/1 core? My instinct says to stick with the number of physical processors (or less), but, is that based on reality? I spent a good while looking for an answer to this, but perhaps my google-karma isn't in my favor today.

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• How would I put together a site requiring several TB? [closed]

  - by acidzombie24

  Lets say I have a site with unmetered 100MBPS bandwidth (i assume its bits?) and the ram i require. Most plans i see offer HDD that hold 250gb and 1TB. But what happens if i compile/generate enough data that i require 10tb or 25tb? (I'd likely have two servers but...) I wouldn't be serving all of that data (well not to the public) so CDN wouldn't make sense. What do i do in this scenario? Do I need to get a custom plan from a hosting provider? (if so how do i find them?) Are there services that allow me to mount remote drives (that sounds wrong unless its a CDN so maybe not). Are there host that deals specifically with unmetered bandwidth and provides lots of disk space? Math says ~1TB is the most i'll ever need but if i happen to need more i'd like to know my options.

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• reverse nslookup fails for single machine

  - by matt wilkie

  I have a computer on a windows Active Directory network for which reverse dns lookup fails. It doesn't matter which machine runs the lookup. The problem computer is a debian vm on a windows server 2003 host. >nslookup wiki.dept Server: primary.internal.domain.org Address: 192.111.222.44 Name: wiki.dept.internal.domain.org Address: 192.111.111.185 >nslookup 192.111.111.185 Server: primary.internal.domain.org Address: 192.111.222.44 *** primary.internal.domain.org can't find 192.111.111.185: Non-existent domain Contents of /etc/resolv.conf on the debian guest: nameserver 192.111.111.244 nameserver 192.111.222.44 search internal.domain.org What is wrong? how do I get ip-to-name resolution to work for this machine? Thank you.

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• Cisco VPN and .pcf file

  - by yael

  I have few of profiles .pcf files , and I used them in order to automate the vpmclient connection VIA CLI command I have WIN XP server for example vpmclient connect "customor_alpha" until now everything is ok but I have problem with the last of my profiles - area1.pcf the problem is when I type in CMD window the following ( to create VPN connection ) vpmclient connect "area1" after 2 second CISCO window will pop up and ask for password , ( username already defined in window ) please advice what could be the problem , why I get the "CISCO PVN window" ? or maybe I have some in correct syntax in my .pcf file , I checked the .pcf file again and again and I couldn't find the problem ? example of area1.pcf ( only example - not my real pcf ) [main] Description=connection to TechPubs server Host=10.10.99.30 AuthType=1 GroupName=docusers GroupPwd= enc_GroupPwd=158E47893BDCD398BF863675204775622C49<SNIPPED> EnableISPConnect=0 ISPConnectType=0 ISPConnect= ISPCommand= Username=alice SaveUserPassword=0 UserPassword= enc_UserPassword= NTDomain= EnableBackup=1 BackupServer=Engineering1, Engineering2, Engineering 3, Engineering4 EnableMSLogon=0 MSLogonType=0 EnableNat=1 EnableLocalLAN=0 TunnelingMode=0 TCPTunnelingPort=10000 CertStore=0 CertName= CertPath= CertSubjectName SendCertChain=0 VerifyCertDN=CN=”ID Cert”,OU*”Cisco”,ISSUER-CN!=”Entrust”,ISSURE-OU!*”wonderland” DHGroup=2 PeerTimeOut=90 ForceNetLogin=

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• P4 vs. i3/i5 *T in power consumption and performance [migrated]

  - by Walter Zomb

  I am running an Intel P4 prescott with HT on my home server (linux file server on encrypted disks on software-RAID5 and virtualisation host for three further machines). The performance for this purpose is really okay. When the system is idle it consumes about 140W power. I am considering buying a new mainboard for an e.g. Intel i3-2100T or an Intel i5-2390T. Both are low power CPUs with a TDP about 40W. Has anyone experiences how much power a recent mainboard with one of these CPUs an 3-4 'green-energy' disks (6W each) consumes? Do I get underneath the 100W threshold? What's about the performance of these low power CPUs? Are they comparable to an Intel P4 with HT? regards, walter

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• shared web hosting architecture in a university setting

  - by gaspol

  We're in the process of creating a shared webhosting infrastructure for our university. Departments within the university can host their sites on this infrastructure. We're thinking of setting up multiple, load balanced web servers attached to shared storage (for web content and Apache config files). There will also be database servers behind these web servers. Does anyone have any other suggestions about this? Any recommendations for an alternative setup? Would having cPanel/WHM/Plesk be a good idea to automate account creation/maintenance?

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• Unable to connect to Amazon EC2 without using PPK file

  - by Krishna

  I have a build job which runs on Hudson and synchronizes content from an Amazon AWS server. This is written in shell I have a PPK file given to me which can establish the connectivity Here is the problem. The build script I use doesn't establish the connectivity in the code. So, I manually connect the host thro the PPK file using Putty and then run the job, then it works fine I am new to the shell stuff. Could someone help me out by suggesting how I can establish connectivity using the PPK file in the shell so I do not have to do it manually thro Putty? Thanks, Krishna

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• Does kern.hz still have any relevance in FreeBSD if "dynamic tick mode" is enabled?

  - by Frerich Raabe

  I'm running a FreeBSD 9.0 setup as a virtual machine in a KVM setup. In previous versions of FreeBSD it was common to force the kern.hz setting to a lower value so that the virtual machine does not keep the host busy because it's handling timer interrupts without having any work to do - the FreeBSD Handbook explains: The most important step is to reduce the kern.hz tunable to reduce the CPU utilization of FreeBSD under the Parallels environment. This is accomplished by adding the following line to /boot/loader.conf: kern.hz=100 Without this setting, an idle FreeBSD Parallels guest OS will use roughly 15% of the CPU of a single processor iMac®. After this change the usage will be closer to a mere 5%. However, in FreeBSD 9, the "dynamic tick mode" (aka "tickless mode") is the default, controlled by the kern.eventtimer.periodic setting which defaults to 0 (read: tickless mode). This makes me wonder - does the tip of lowering kern.hz still have any relevance for making FreeBSD 9 play nicely in a virtual machine setup?

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• Get sessions' remote IP from Teamviewer log file

  - by etuardu

  I'd like to know who has logged in to my machine and when. I have two TeamViewer log files: Connections_incoming.txt and TeamViewer7_Logfile.log. The first one is quite plain and lists, as its name says, the incoming connections to the machine, reporting the local name of the remote host, login time, logout time, and some ids. e.g.: 173274362 MYLAPTOP 20-02-2012 17:32:16 20-02-2012 17:50:42 Master RemoteControl {C5AAE483-ED0B-54B8-9235-7AE597CAD342} This is almost all what I need, but unfortunately no remote IP address is reported here, so I checked for IPs in TeamViewer7_Logfile.log but it is really messy. It indeed contains some IP addresses but I can't understand which one is bound with the items in the first log file. Is there a way to interpolate the two logs to get what I need? Should I search the second file for some particular text? What do you suggest?

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• Recycle remote IIS app pool from the command line?

  - by Ken

  Is it possible to recycle an IIS7 app pool from the command line, on a different machine? I've found APPCMD (appcmd recycle apppool my-app-pool), but it only operates on the host it's run on, AFAICT. I heard a rumor there might be a way to do it with Powershell, but I know nothing about that, and I'm apparently not very good at googling for it. I'm using Vista / Server 2008, if that matters. EDIT: I found something called WinRM that somebody claims is able to run APPCMD itself, but I'm not sure exactly how, yet.

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• Ubuntu and mysql server. Something isnt allowing me to connect

  - by acidzombie24

  I have a question about mysql settings http://serverfault.com/questions/94054/remote-connections-and-mysql-on-ubuntu/94088#94088 now i want to figure out why i cannot connect. I made sure bind-address was commented out. I can ping the server within the VM but i cannot ping it from within the VM using mysqladmin --protocol=tcp --host=self_ip ping. I also followed along and check if my ports were open and they look like they are. I setup samba on that VM and can access that with no problem as well. It looks like ubuntu does not have a firewall either (i figured this out before) so i am stumped why the server isnt allowing my connection. Apparently the config file works on another person side http://www.pastie.org/742545 I am using Ubuntu 6.06 LTS just because of 'support' reasons. So hopefully this will be 'easy'?

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• Xen private networking between multiple hosts

  - by Joe

  I have two physical hosts running Xen 3.2, sharing storage via iSCSI. On these two hosts are a number of domUs and I'd like to network them in multiple private networks so they can only contact other domUs on their private network. My understanding of the xen documentation suggests it's possible to do this within one dom0 (ie create virtual networks between domUs), but I've found nothing explaining how this can be implemented across multiple dom0s on different hosts. The only thing that jumps to mind is manually creating iptable rules to route data to the other host, but this seems to lack elegance and could quickly grow cumbersome. Any suggestions? All advice is much appreciated!

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• Cutting users off in Windows console sessions

  - by RoRy

  I'm currently working in a company where many of us log onto hosts/servers under Windows Server 2008 via console session. If one person is logged on and another tries it causes the person who was logged on first (and maybe doing something important) to be cut off. Is there such a thing as an application for such events where before logging on people can see if any other IP address is controlling the host/server? Also, if the person on the console session had the ability to leave a note for anybody thinking of taking over the session of when they are finished etc.. I have many other ideas for such things but could someone tell me if such an application exists?

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• set proxy for vpn server on ubuntu server 12.4

  - by Morteza Soltanabadiyan

  I have a vpn server with HTTPS, L2TP , OPENVPN , PPTP. i want to set proxy in the server so all connection that comes from vpn clients use the proxy that i set in my server. I made a bash script file for it , but proxy not working. gsettings set org.gnome.system.proxy mode 'manual' gsettings set org.gnome.system.proxy.http enabled true gsettings set org.gnome.system.proxy.http host 'cproxy.anadolu.edu.tr' gsettings set org.gnome.system.proxy.http port 8080 gsettings set org.gnome.system.proxy.http authentication-user 'admin' gsettings set org.gnome.system.proxy.http authentication-password 'admin' gsettings set org.gnome.system.proxy use-same-proxy true export http_proxy=http://admin:[email protected]:8080 export https_proxy=http://admin:[email protected]:8080 export HTTP_PROXY=http://admin:[email protected]:8080 export HTTPS_PROXY=http://admin:[email protected]:8080 Now , i dont know what to do to make a global proxy for server and all vpn clients use it automatically.

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• Resolve Wrong IP from Domain Name only on certain networks

  - by Godric Seer

  I host a personal website on an old desktop that is LAMP based. There are several strange things about this problem so I will break it down into steps. Since I have a dynamic IP, I use no-ip to make sure I have a working domain name at all times. I use the automatic update client, but logged in and checked and my no-ip domain has the proper IP tied to it. Here is a link to the homepage through the no-ip domain for reference. Also, I do a ping and a traceroute on the no-ip domain and get: [eckertzs@localhost ~]$ ping -c 1 endradil.noip.me PING endradil.noip.me (65.24.215.99) 56(84) bytes of data. 64 bytes from endradil.noip.me (65.24.215.99): icmp_seq=1 ttl=64 time=2.23 ms --- endradil.noip.me ping statistics --- 1 packets transmitted, 1 received, 0% packet loss, time 104ms rtt min/avg/max/mdev = 2.233/2.233/2.233/0.000 ms [eckertzs@localhost ~]$ traceroute endradil.noip.me traceroute to endradil.noip.me (65.24.215.99), 30 hops max, 60 byte packets 1 . (192.168.2.1) 1.755 ms 5.409 ms 5.380 ms 2 endradil.noip.me (65.24.215.99) 6.297 ms 9.543 ms 10.324 ms Using this domain, I can connect to my webserver without issue or interruption(the https is required to avoid a redirect serverside, but it works). I also have a domain I have bought on GoDaddy where I have a CNAME record forwarding the www subdomain to my no-ip domain. CNAME Record Host: www Points to: endradil.noip.me TTL: 1 hour For the past several weeks, I never had an issue using the GoDaddy domain to connect (ssh or https). As of the past few days, however, the GoDaddy domain has only worked intermittently, for a few minutes at a time and then will go down for hours at a time. I get server not found errors most of the time. Also, if I happen to be using the GoDaddy domain for an ssh connection, the connection will freeze. I have run online tests of the DNS and have seen that the website is visible by external servers and resolved to the correct IP. I also contacted GoDaddy support but they had no issues connecting to the website, and therefore did not see any issues. My personal computers (Windows desktop, linux laptop, android phone) all fail to connect when on my personal wifi. If I disconnect my phone from the wifi and use my AT&T wireless data, it can connect with both domains without issue. When I attempt to use Google webmaster tools to crawl the site using the GoDaddy domain, Google can not find the site. From my linux laptop, I have found some interesting results when I ping or traceroute the domain. The results from these: [eckertzs@localhost ~]$ ping -c 1 www.endradil.com PING www.endradil.com.Belkin (198.105.244.228) 56(84) bytes of data. --- www.endradil.com.Belkin ping statistics --- 1 packets transmitted, 0 received, 100% packet loss, time 10000ms [eckertzs@localhost ~]$ traceroute www.endradil.com traceroute to www.endradil.com (198.105.244.228), 30 hops max, 60 byte packets 1 . (192.168.2.1) 1.918 ms 2.806 ms 2.772 ms 2 cpe-65-24-208-1.insight.res.rr.com (65.24.208.1) 29.247 ms 29.654 ms 30.094 ms 3 cpe-69-23-24-117.new.res.rr.com (69.23.24.117) 15.597 ms 23.218 ms 23.581 ms 4 agg24.clmcohib01r.midwest.rr.com (65.29.1.52) 30.581 ms 30.556 ms 31.192 ms 5 be27.clevohek01r.midwest.rr.com (65.29.1.38) 30.580 ms 31.062 ms 31.038 ms 6 bu-ether25.atlngamq47w-bcr01.tbone.rr.com (107.14.19.38) 37.863 ms 68.844 ms 43.773 ms 7 107.14.17.178 (107.14.17.178) 51.866 ms 51.019 ms 50.989 ms 8 ae0.pr1.dca10.tbone.rr.com (107.14.17.200) 48.467 ms ae-4-0.a0.lax91.tbone.rr.com (66.109.1.113) 49.912 ms * 9 v413.core1.ash1.he.net (209.51.175.33) 60.270 ms 50.842 ms 50.819 ms 10 100ge5-1.core1.nyc4.he.net (184.105.223.166) 55.597 ms 56.045 ms 56.020 ms 11 xerocole-inc.10gigabitethernet12-4.core1.nyc4.he.net (216.66.41.242) 56.001 ms 55.969 ms 55.992 ms 12 * * * both show the incorrect IP. Also, the traceroute timesout on hops 12 through 255 (output truncated above). The traceroute using site24x7 works and shows reasonable results when run from their california server. From another linux box on a different network but in the same city as me (10 miles away), I still get timeout for traceroute, however the IP resolves correctly for the domain. From this I believe that the DNS result is incorrectly cached in either my router/modem or perhaps even at my ISP level. My question is, first, how do I find out exactly what is wrong, and second, how do I resolve it.

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• Tomcat - virtualhosting - name / ip / port - based

  - by lisak

  Hey, what are the usage scenarios for these kinds of virtual hosting ? Name Based - typical tomcat virtual hosting, one HOME instance with many contexts, each as an individual host IP based / port based - multiple instances of tomcat ( how is it with performance and memory consuption?) running on IP aliases (virtual IPs) for one network adapter, usually behind http apache server that can run name based virtual hostings. Otherwise I can't figure out how would I forward requests in iptables/firewall based on IP address, which is just one. How is IP based virtual hosting done as to Tomcat and multiple instances ? I'd like to hear some usage scenarios from your experience. How are you running your applications. Cause there are applications having it's own modified classloader and they are developed in a way to run alone withing a tomcat instance. Then there are trivial applications which can run within one instance without problems. Many thanks

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• Preparing a new physical system with VMWare

  - by Max

  I need to create a new installation of Windows, but at the same time I need this computer. So I decided to create a new physical disk from within VMWare, install windows/drivers/software and then just replace the HDD in the computer. I've bought a new HDD, split it into two partions and installed Windows 7 using the VMWare's ability to use phusical disks. I can see the windows files and directories that have been created on this partition, but when I'm replacing the HDD in the host machine it cannot boot from it. Why is that? Is it at all possible to create a bootable physical disk with VMWare or I should create a virtual disk and then use some HDD imaging tool to copy the HDD image to a physical disk? Maybe there's a better way of installing a new system and working on the computer at the same time?

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• High availability for Windows Service under Windows Server 2003

  - by empi

  Hi. I have a following situation: I need to deploy a windows service that listens for incoming request on tcp port (basically WCF service). I have a High Availability requirement - the service must be deployed on two servers and if the service stops (only the service, not the whole server) on one server, all the requests must be redirected to the second one. For me it looks like a basic failover scenario. How can I achieve this on Windows Server 2003? Should I use Microsoft Cluster Service or Network Load Balancing? The important part is that the process of swapping the servers should not concern the clients (the client must see only single address / single host or domain name). Thanks in advance for help.

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• ZFS and SAN -- best practices?

  - by chris

  Most discussions of ZFS suggest that the hardware RAID be turned off and that ZFS should directly talk to the disks and manage the RAID on the host (instead of the RAID controller). This makes sense on a computer with 2-16 or even more local disks, but what about in an environment with a large SAN? For example, the enterprise I work for has what I would consider to be a modest sized SAN with 2 full racks of disks, which is something like 400 spindles. I've seen SAN shelves that are way more dense than ours, and SAN deployments way larger than ours. Do people expose 100 disks directly to big ZFS servers? 300 disks? 3000 disks? Do the SAN management tools facilitate automated management of this sort of thing?

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• Apache: Setting up a reverse proxy configuration with SSL with url rewriting

  - by user1172468

  There is a host: secure.foo.com that exposes a webservice using https I want to create a reverse proxy using Apache that maps a local http port on a server internal.bar.com to the https service exposed by secure.foo.com Since it a web service I need to map all urls so that a path: https://secure.foo.com/some/path/123 is accessible by going to: http://internal.bar.com/some/path/123 Thanks. I've gotten this far: <VirtualHost *:80> ServerName gnip.measr.com SSLProxyEngine On ProxyPass / https://internal.bar.com/ </VirtualHost> I think this is working except for the url rewriting. Some resources I've found on this are: Setting up a complex Apache reverse proxy Apache as reverse proxy for https server

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• pnp4nagios does not generate perfdata

  - by gonvaled

  I am running nagios2, pnp4nagios-0.6.16 and php 5.2.4-2ubuntu5.19. In my setup, pnp4nagios is correctly generating perfdata, which can be seen via the web interface in graphical form for lots of services. The perfdata directory contains entries of the kind: /usr/local/pnp4nagios/var/perfdata/zeus/Disk_Space_Home.rrd /usr/local/pnp4nagios/var/perfdata/zeus/Disk_Space_Home.xml I have activated performance data for a new nagios service: define serviceextinfo { host_name zeus service_description 450average action_url /pnp4nagios/index.php?host=$HOSTNAME$&srv=$SERVICEDESC$ } This service is generating monitoring data in the format: status_info|perf_data as required for performance gathering. But somehow the performance data related to this service is not being collected by pnp4nagios (no related entries in /usr/local/pnp4nagios/var/perfdata) Are there any pnp4nagios scripts or settings which I could use to debug this?

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• Teredo and IPV6 web servers

  - by Sandro Antonucci

  Hello, I have two different questions, the first one could be stupid. I was reading about IPV6 and ended up in this site http://test-ipv6.com/ that says that I have a public IPV6 with Teredo tunneling. I don't understand if this Teredo is a software thing, does it have to with my ISP, is it enabled by Windows, how do I get that IPV6 IP, where does it come from? I have windows 7. Second question, I have a VPS with IPV6 connectivity only I can connect to it (apparently thanks to Teredo) and visit pages from the web server using IPV6 IP directly into the browser, is it possibile to host a website on there accessible by the IPV4 network? maybe some dns servers than tunnel traffic from IPV4(user) to IPV6(server)? Thank you

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