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• Bind9 DNS help with psuedo domains

  - by Tempname

  I have setup a dns server on my home network to manage some apps that I have written for home. Currently I have 3 "domains" that I am using: controller devserver fileserver The first issue that I am having is that when I attempt to ping the parent domain of any of these 3 I am unable to. I simply get ping: unknown host controller. I however can ping any of the subdomains I have setup for these 3 parent domains. The second issue is I am unable to ping any of the 3 parent domains or any child domains from my window machines. I have verified that these domains work on other devices in my house (ipod touch, ipad, cell phone). Any help with this is greatly appreciated Here is bind data file for my parent domain controller: ; ; BIND data file for local loopback interface ; $TTL 604800 @ IN SOA controller. admin.controller. ( 9 604800 86400 2419200 604800 ) ; @ IN NS controller. @ IN A 192.168.1.104 controller IN A 192.168.1.194 admin.controller. IN A 192.168.1.104

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• Managing Many External Hosts Using EC2 and Route 53

  - by futureal

  Looking for a "best practice" answer to managing externally-addressable hosts using the combination of Amazon EC2 and Amazon Route 53, without using Elastic IPs for each host. In my scenario I will have 30+ hosts that need to be accessible from outside EC2, so directly using internal DNS will not work. In the past, I have addressed hosts by assigning an elastic IP to that host (let's say, 55.55.55.55) and then creating an associated A record. For example, let's say I want to create "ec2-corp01.mydomain.com" I might do: ec2-corp01.mydomain.com. A 55.55.55.55 300 Then on that EC2 instance, I would assign the Elastic IP of 55.55.55.55, and everything works fine. Of course, to make this work, I need to have one Elastic IP per instance, which is something I'd like to avoid if possible; I'd like the infrastructure to be more dynamic. So my thought is to try something like: Create a script that queries the internal EC2 tools to determine an instance's private hostname On instance boot, call that script to determine its hostname, and then using the command-line Route 53 interface to find and update that hostname to its current internal hostname Since the host will have a relatively low TTL (let's say 300 as above, or 5 minutes) it should take effect pretty quickly Is this a good idea? Is there a better or more widely accepted way to handle it? If it IS a good idea, what type of record should I be creating? A CNAME that points to the internal host, like ec2-55-55-55-55.compute-1.amazonaws.com? Is an A record better or worse? Thanks!

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• Different routing rules for a particular user using firewall mark and ip rule

  - by Paul Crowley

  Running Ubuntu 12.10 on amd64. I'm trying to set up different routing rules for a particular user. I understand that the right way to do this is to create a firewall rule that marks the packets for that user, and add a routing rule for that mark. Just to get testing going, I've added a rule that discards all packets as unreachable: # ip rule 0: from all lookup local 32765: from all fwmark 0x1 unreachable 32766: from all lookup main 32767: from all lookup default With this rule in place and all firewall chains in all tables empty and policy ACCEPT, I can still ping remote hosts just fine as any user. If I then add a rule to mark all packets and try to ping Google, it fails as expected # iptables -t mangle -F OUTPUT # iptables -t mangle -A OUTPUT -j MARK --set-mark 0x01 # ping www.google.com ping: unknown host www.google.com If I restrict this rule to the VPN user, it seems to have no effect. # iptables -t mangle -F OUTPUT # iptables -t mangle -A OUTPUT -j MARK --set-mark 0x01 -m owner --uid-owner vpn # sudo -u vpn ping www.google.com PING www.google.com (173.194.78.103) 56(84) bytes of data. 64 bytes from wg-in-f103.1e100.net (173.194.78.103): icmp_req=1 ttl=50 time=36.6 ms But it appears that the mark is being set, because if I add a rule to drop these packets in the firewall, it works: # iptables -t mangle -A OUTPUT -j DROP -m mark --mark 0x01 # sudo -u vpn ping www.google.com ping: unknown host www.google.com What am I missing? Thanks!

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• Apache doesn't immediately notice a change in the document root

  - by Tom

  We use capistrano for website deployments and our Apache document root is a symlink to a particular code release. The deployment procedure switches the symlink from the old release to the new release as the final step of the deployment. We are migrating our webservers from real servers running RHEL 5.6 to Amazon EC2 virtual machines running Ubuntu 11.10 and the new servers are suffering from a problem where Apache doesn't immediately notice the change to it's document root when the symlink is switched. It can take a second or so (and I think I've even seen it take a couple of minutes). It's kind of like Apache has cached the physical path of the symlink for some time. Does anyone know some Apache settings I could look at to get it to "scan" for changes to it's served files quicker. Thoughts: I read that the disks on virtual machines are much slower (since they are network attached storage). Perhaps the filesystem cache somehow works differently too? If so, is there anything that can be done? The website runs PHP code. Perhaps there is some PHP config differences between RHEL and Ubuntu? I checked realpath_cache_ttl but both servers have it commented out: e.g. ; Duration of time, in seconds for which to cache realpath information for a given ; file or directory. For systems with rarely changing files, consider increasing this ; value. ; http://www.php.net/manual/en/ini.core.php#ini.realpath-cache-ttl ;realpath_cache_ttl = 120 We do use the APC opcode cache but don't think it's the issue due to experimentation. The PHP code is in different file paths for each deployment and we ensure stat=1. Here is a similar question that is very interesting: 294107 - but doesn't provide an answer for me. One solution would be to reload Apache everytime we modify the document root symlink. I'll do this if we can't find another solution.

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• Mac OS X Client With Static DHCP Assignment Requests Wrong IP via Option 50

  - by Starchy

  I have a number of Mac (and a few Linux) laptops getting DHCP from a Force10 layer 3 switch, the only DHCP server on the subnet. There's a global dynamic pool, and for each full-time employee's laptop I have a single IP static pool set by MAC address. One and only one of the clients, running OS X 10.7.5, consistently fails to get a static assignment. The MAC address in the static pool definition has been carefully re-checked. Running tcpdump on a mirrored port when the laptop connects, I see that it is specifically requesting 10.100.0.252 (a dynamic address): 11:32:10.108280 IP (tos 0x0, ttl 255, id 28293, offset 0, flags [none], proto UDP (17), length 328) 0.0.0.0.bootpc > broadcasthost.bootps: [udp sum ok] BOOTP/DHCP, Request from 3c:07:54:xx:xx:xx (oui Unknown), length 300, xid 0x1399da89, Flags [none] (0x0000) Client-Ethernet-Address 3c:07:54:xx:xx:xx (oui Unknown) Vendor-rfc1048 Extensions Magic Cookie 0x63825363 DHCP-Message Option 53, length 1: Request Parameter-Request Option 55, length 9: Subnet-Mask, Default-Gateway, Domain-Name-Server, Domain-Name Option 119, LDAP, Option 252, Netbios-Name-Server Netbios-Node MSZ Option 57, length 2: 1500 Client-ID Option 61, length 7: ether 3c:07:54:xx:xx:xx Requested-IP Option 50, length 4: 10.100.0.252 Lease-Time Option 51, length 4: 7776000 Hostname Option 12, length 10: "host-name" END Option 255, length 0 PAD Option 0, length 0, occurs 8 I haven't been able to find any extra system prefs or unusual software on the laptop. Disabling the interface and rebooting or temporarily setting the IP manually both fail to make any difference. Any suggestions appreciated.

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• How to utilize Varnish for A/B Testing and Feature Rollout?

  - by Ken

  Hi all, wasn't really sure if this should go here on or stackoverlow - admins, please move if i'm mistaken (and sorry). Today we have our web layer exposed to the world. We would like to add Varnish in front of our web layer to accelerate the site and reduce calls to the backend. However, we have some concerns and i was wondering how most people approach them: A/B Testing - How do you test two "versions" of each page and compare? I mean, how does varnish know which page to serve up? If and how do you save seperate versions on each page? Feature rollout - how would you set up a simple feature rollout mechanism? Let's say i want to open a new feature/page to just 10% of the traffic.. and then later increase that to 20%? How do you handle code deployments? Do you purge your entire varnish cache every deployment? (We have deployments on a daily basis). Or do you just let it slowly expire (using TTL)? Any ideas and examples regarding these issues is greatly appreciated! Thanks in advance. Ken.

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• HP Procurve 2610 intervlan routing

  - by user19039

  Can anyone tell me why inter vlan routing is working for all vlans except my newly created vlan 4/ I have an hp procurve 2610. Any help would be appreciated. I have basically this 1 switch with all unmanaged switches attached to the core. We have a second 2610 on port 28 Running configuration: ; J9085A Configuration Editor; Created on release #R.11.25 hostname "Core_HP" interface 22 speed-duplex 100-full exit ip routing snmp-server community "public" Unrestricted vlan 1 name "DEFAULT_VLAN" untagged 1-12,17-22,26-27 ip address 192.168.4.6 255.255.255.0 tagged 25 no untagged 13-16,23-24,28 exit vlan 2 name "WAN" untagged 28 ip address 10.254.254.3 255.255.255.0 exit vlan 3 name "Wireless" untagged 13-16,24 ip address 192.168.7.6 255.255.255.0 ip helper-address 192.168.4.2 tagged 27 exit vlan 35 name "guest" untagged 23 tagged 24 exit vlan 4 name "esxi" untagged 25 ip address 10.10.1.1 255.255.248.0 exit ip route 192.168.5.0 255.255.255.0 10.254.254.1 ip route 192.168.6.0 255.255.255.0 10.254.254.1 ip route 0.0.0.0 0.0.0.0 192.168.4.10 show ip route IP Route Entries Destination Gateway VLAN Type Sub-Type M etric Dist. ------------------ --------------- ---- --------- ---------- - --------- ----- 0.0.0.0/0 192.168.4.10 1 static 1 1 10.10.0.0/21 esxi 4 connected 0 0 10.254.254.0/24 WAN 2 connected 0 0 127.0.0.0/8 reject static 0 250 127.0.0.1/32 lo0 connected 0 0 192.168.4.0/24 DEFAULT_VLAN 1 connected 0 0 192.168.5.0/24 10.254.254.1 2 static 1 1 192.168.6.0/24 10.254.254.1 2 static 1 1 192.168.7.0/24 Wireless 3 connected 0 0 show ip Internet (IP) Service IP Routing : Enabled Default TTL : 64 Arp Age : 20 VLAN | IP Config IP Address Subnet Mask Prox y ARP ------------ + ---------- --------------- --------------- ---- ----- DEFAULT_VLAN | Manual 192.168.4.6 255.255.255.0 No WAN | Manual 10.254.254.3 255.255.255.0 No Wireless | Manual 192.168.7.6 255.255.255.0 No esxi | Manual 10.10.1.1 255.255.248.0 No guest | Disabled

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• wildcard deal with www as a subdomain

  - by Alaa Gamal

  i am using wildcard with apache my APACHE CONFIG: ServerAlias *.staronece1.com DocumentRoot /staronece1/domains my named file $ttl 38400 staronece1.com. IN SOA staronece1.com. email.yahoo.com. ( 1334838782 10800 3600 604800 38400 ) staronece1.com. IN NS staronece1.com. staronece1.com. IN A 95.19.203.21 www.staronece1.com. IN A 95.19.203.21 server.staronece1.com. IN A 95.19.203.21 mail.staronece1.com. IN A 95.19.203.21 ns1.staronece1.com. IN A 95.19.203.21 ns2.staronece1.com. IN A 95.19.203.21 staronece1.com. IN NS ns1.staronece1.com. staronece1.com. IN NS ns2.staronece1.com. staronece1.com. IN MX 10 mail.staronece1.com. * 14400 IN A 95.19.203.21 *.staronece1.com IN A 95.19.203.21 my php test file /staronece1/domains/index.php <?php function getBname(){ $bname=explode(".",$_SERVER['HTTP_HOST'],2); return $bname[0]; } echo 'SubDomain is :'.getBname(); ?> if i go to something.staronece1.com i get this result SubDomain is : something No the problem is if i go to www.staronece1.com i should get empty result, because www is not a sub domain but i get this result SubDomain is : www And if i go to www.something.staronece1.com i get firefox error message ( site not found ) How to fix this problem?? i think the solution is: added record for www in named file Thanks

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• Difference between "traceroute" and "traceroute -U"

  - by AndiDog

  The manpage of traceroute says that the "-U" parameter (UDP probing) is the default, but I'm getting different results every time. With "-U": traceroute -U www.univ-paris1.fr traceroute to www.univ-paris1.fr (193.55.96.121), 30 hops max, 60 byte packets [...] 13 rap-vl165-te3-2-jussieu-rtr-021.noc.renater.fr (193.51.181.101) 59.445 ms 56.924 ms 56.651 ms [...] 18 * paris1web.univ-paris1.fr (193.55.96.121) 23.797 ms 23.603 ms but the normal traceroute gives me another result (never reaches the final node) - it's either "!X" or just exits after the maximum of 30 hops: traceroute www.univ-paris1.fr traceroute to www.univ-paris1.fr (193.55.96.121), 30 hops max, 60 byte packets [...] 11 te1-1-paris1-rtr-021.noc.renater.fr (193.51.189.38) 28.147 ms 28.250 ms 28.538 ms [... non-responding nodes ...] 28 site-1.03-jussieu.rap.prd.fr (195.221.126.58) 85.941 ms !X * * Note: I tried this very often and always get the same results. The path in my local network is always the same. So what does the "-U" parameter actually change here? I'm especially interested what the reason for "!X" could be (communication administratively prohibited). EDIT: If that helps, paris-traceroute gives me the following for the last hop: 14 P(1, 6) site-1.03-jussieu.rap.prd.fr (195.221.126.58) 34.938 ms !5 !T2 which means that node discards the packet with TTL=2 and returns an unknown message (not "destination unreachable" or the like).

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• Why is this APC installation failing so badly?

  - by Matt

  I have multiple instances of APC running on my server with similar configurations (albeit with different cache sizes. However, one of the instances is performing extremely poorly, and I have no idea why (100% cache fragmentation, high miss rate). The runtime settings I'm using are as follows (pretty much out of the box): apc.cache_by_default 1 apc.canonicalize 1 apc.coredump_unmap 0 apc.enable_cli 0 apc.enabled 1 apc.file_md5 0 apc.file_update_protection 2 apc.filters apc.gc_ttl 3600 apc.include_once_override 0 apc.lazy_classes 0 apc.lazy_functions 0 apc.max_file_size 1M apc.mmap_file_mask apc.num_files_hint 1000 apc.preload_path apc.report_autofilter 0 apc.rfc1867 0 apc.rfc1867_freq 0 apc.rfc1867_name APC_UPLOAD_PROGRESS apc.rfc1867_prefix upload_ apc.rfc1867_ttl 3600 apc.shm_segments 1 apc.shm_size 10M apc.slam_defense 1 apc.stat 1 apc.stat_ctime 0 apc.ttl 0 apc.use_request_time 1 apc.user_entries_hint 4096 apc.user_ttl 0 apc.write_lock 1 APC is version 3.1.6, PHP is 5.3.3-1ubuntu9.5. I've tried restarting Apache multiple times, so this isn't a freak instance. The instance with problems is simply running Wordpress with a few plugins installed. All other instances (~4) on the server are running perfectly fine with almost 100% hit rates and 0% fragmentation; for example this instance is holding a website built using the Symfony framework. Any help would be much appreciated; I haven't had much experience with APC and was hoping for it to be an out-of-the-box speed boost ;).

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• dnssec zonesigner ignoring out-of-zone data

  - by jordi12100

  I am trying to configure DNSSec with BIND9 on CentOS 6.4 running DirectAdmin control panel. I am using this tutorial to make it work: https://www.dnssec-tools.org/wiki/index.php/Zonesigner But I can't get it work... When I run this command: zonesigner --genkeys jordikroon.nl.db jordikroon.nl.db.signed I get this error: jordikroon.nl.db:17: ignoring out-of-zone data (jordikroon.nl) jordikroon.nl.db:18: ignoring out-of-zone data (jordikroon.nl) jordikroon.nl.db:22: ignoring out-of-zone data (jordikroon.nl) jordikroon.nl.db:29: ignoring out-of-zone data (jordikroon.nl) jordikroon.nl.db:33: ignoring out-of-zone data (jordikroon.nl) zone jordikroon.nl.db/IN: has no NS records zone jordikroon.nl.db/IN: not loaded due to errors. I can't find anything on the web about this error. This is my zone db file: $TTL 14400 @ IN SOA ns1.ghservers.org. hostmaster.jordikroon.nl. ( 2013090703 14400 3600 1209600 86400 ) jordikroon.nl. 14400 IN NS ns1.ghservers.org. jordikroon.nl. 14400 IN NS ns2.ghservers.org. cp 14400 IN A 85.17.32.228 ftp 14400 IN A 85.17.32.228 jordikroon.nl. 14400 IN A 85.17.32.228 localhost 14400 IN A 127.0.0.1 mail 14400 IN A 85.17.32.228 pop 14400 IN A 85.17.32.228 smtp 14400 IN A 85.17.32.228 www 14400 IN A 85.17.32.228 jordikroon.nl. 14400 IN MX 10 mail jordikroon.nl. 14400 IN TXT "v=spf1 a mx ip4:85.17.32.228 ~all" localhost 14400 IN AAAA ::1 How do I have to fix this? All IN keywords are being ignored. Any help is welcome:-)

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• DNS zone file SPF configuration to support sending mail from multiple servers and gmail

  - by Tauren

  I want to configure SPF on a domain to allow mail to be sent from: the x.com website server (x.com and www.x.com - both at same IP) it's MX servers (smtp.x.com, mx.x.com, mail.x.com) another server that isn't listed as an MX server (somehost.x.com) via gmail using an account that has authenticated use of [email protected] Will this zone file work? If not, what are the problems with it? $ttl 38400 @ IN SOA ns1.x.com. hostmaster.x.com. ( 201003092 ; serial 8H ; refresh 15M ; retry 1W ; expire 1H ) ; minimum @ NS ns1.x.com. @ NS ns2.x.com. @ MX 10 mx.x.com. @ MX 20 smtp.x.com. @ MX 30 mailhost.x.com. ; SPF records @ IN TXT "v=spf1 a mx a:somehost.x.com include:_spf.google.com ~all" mx IN TXT "v=spf1 a -all" smtp IN TXT "v=spf1 a -all" mailhost IN TXT "v=spf1 a -all" Questions: Is _spf.google.com the right thing to include for gmail.com, or is it only for Google Hosted Apps? If only for Google Apps, what should I include to send from gmail.com? If mail shouldn't be sent from anywhere else, is it safe to use -all instead of ~all? Does it make sense to add specific SPF records for each of the mail servers? Any other problems with the zone file? I want to confirm these things before making changes to my zone file. The file has SPF configured basically the same now, just without google.com and somehost, but I want to make sure I won't break things when I change it.

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• APC not caching many files

  - by tetranz

  Hello I have a Drupal site running on a VPS at Linode with PHP 5.2.10 and APC 3.1.6. It never caches more than about 25 files and barely uses any of its available memory. Drupal has hundreds of php files. I have another server where APC seems to work well and does indeed cache hundreds of files. The only difference with that site is that it runs Ubuntu 10.04 and php 5.3.2. The config settings are the same. What could be wrong? I'll paste the config from apc.php below. This is after hitting multiple parts of Drupal. Thanks APC Version 3.1.6 PHP Version 5.2.10-2ubuntu6.5 APC Host xxx.example.com Server Software Apache/2.2.12 (Ubuntu) Shared Memory 1 Segment(s) with 32.0 MBytes (mmap memory, pthread mutex locking) Start Time 2010/12/02 11:32:17 Uptime 3 minutes File Upload Support 1 File Cache Information Cached Files 21 ( 1.4 MBytes) Hits 169 Misses 21 Request Rate (hits, misses) 1.00 cache requests/second Hit Rate 0.89 cache requests/second Miss Rate 0.11 cache requests/second Insert Rate 0.17 cache requests/second Cache full count 0 User Cache Information Cached Variables 0 ( 0.0 Bytes) Hits 0 Misses 0 Request Rate (hits, misses) 0.00 cache requests/second Hit Rate 0.00 cache requests/second Miss Rate 0.00 cache requests/second Insert Rate 0.00 cache requests/second Cache full count 0 Runtime Settings apc.cache_by_default 1 apc.canonicalize 1 apc.coredump_unmap 0 apc.enable_cli 0 apc.enabled 1 apc.file_md5 0 apc.file_update_protection 2 apc.filters apc.gc_ttl 3600 apc.include_once_override 0 apc.lazy_classes 0 apc.lazy_functions 0 apc.max_file_size 1M apc.mmap_file_mask apc.num_files_hint 1000 apc.preload_path apc.report_autofilter 0 apc.rfc1867 0 apc.rfc1867_freq 0 apc.rfc1867_name APC_UPLOAD_PROGRESS apc.rfc1867_prefix upload_ apc.rfc1867_ttl 3600 apc.shm_segments 1 apc.shm_size 32M apc.slam_defense 1 apc.stat 1 apc.stat_ctime 0 apc.ttl 0 apc.use_request_time 1 apc.user_entries_hint 4096 apc.user_ttl 0 apc.write_lock 1

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• How use DNS server to create simple HA (High availability) of my website?

  - by marc22

  Welcome, How can i use DNS server to create simple HA (High availability) of website ? For example if my web-server ( for better understanding i use internal IP in real it will be other hosting companies) 192.168.0.120 :80 (is offline) traffic go to 192.168.0.130 :80 You have right, i use bad word "hight avability" of course i was thinking about failover. Using few IP in A records is good for simple load-balancing. But not in case, if i want notice user about failure (for example display page, Oops something is wrong without our server, we working on it) against "can't establish connection". I was thinking about setting up something like this 2 DNS servers, one installed on www server Both have low TTL on my domain, set up 2 ns records first for DNS with my apache server second to other dns If user try connect he will get ip of www server using first dns, if that dns is offline (probably www server is also down) so it will try second NS record, what will point to another dns, that dns will point to "backup" page. That's what i would like to do. If You have other idea please share. Reverse proxy is not option, because IP of server can change, or i can use other country for backup.

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• BIND9 DNS Problems - Not resolving

  - by clone1018

  I host a BIND9 DNS server for my VirtualMin users to use. And It only resolves for 75% of the people. It has been WELL over 1 week now. Here is a sample. $ttl 38400 @ IN SOA axxim.net. root.axxim.net. ( 1274031391 10800 3600 604800 38400 ) @ IN NS axxim.net. day7tech.com. IN A 96.226.216.37 www.day7tech.com. IN A 96.226.216.37 ftp.day7tech.com. IN A 96.226.216.37 m.day7tech.com. IN A 96.226.216.37 localhost.day7tech.com. IN A 127.0.0.1 webmail.day7tech.com. IN A 96.226.216.37 admin.day7tech.com. IN A 96.226.216.37 mail.day7tech.com. IN A 96.226.216.37 day7tech.com. IN MX 5 mail.day7tech.com.

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• CNAME rule being ignored

  - by Ben

  On a server with Plesk installed I have added a CNAME rule pointing from one of the sites subdomains to an external website. I have checked the named configuration for that domain name and it shows the CNAME however the sub domain just points to the default server page and ignores the CNAME rule. Named has been restarted and I've also run the rvmng reconfigure-vhost command. I edited another server to test this, on cPanel, and it works fine. The conf file for the domain: ; *** Ts file is automatically generated by Plesk *** $TTL 86400 @ IN SOA ns.example.com. cf.example1.com. ( 1292946742 ; Serial 10800 ; Refresh 3600 ; Retry 604800 ; Expire 10800 ) ; Minimum example.com. IN NS ns.example.com. ns.example.com. IN A xx.xxx.xxx.xx example.com. IN A xx.xxx.xxx.xx webmail.example.com. IN A xx.xxx.xxx.xx mail.example.com. IN A xx.xxx.xxx.xx beta.example.com. IN A xx.xxx.xxx.xx ftp.example.com. IN CNAME example.com. www.example.com. IN CNAME example.com. login.example.com. IN CNAME socialize.gigya.com. example.com. IN MX 10 webmail.example.com. You can see the CNAME rule in the file but it just gets ignored? Thanks in advance for any help.

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• VLC tv card streaming

  - by Franco

  I'm trying to stream the output of my desktop's tv card to my laptop using vlc without success. I have on both pcs ArchLinux installed. I'm stuck here: $ cvlc v4l2:///dev/video0:norm=pal-nc:frequency=543250:size=640x480:channel=0:input-slave=alsa:///dev/dsp:audio=0 --sout '#transcode{vcodec=mp4v,acodec=mpga,vb=3000,ab=256,vt=800000,keyint=80,deinterlace}:standard{access=http,mux=ogg,dst=192.168.0.2:8080}' --ttl 12 VLC media player 1.1.4 The Luggage (revision exported) Blocked: call to unsetenv("DBUS_ACTIVATION_ADDRESS") Blocked: call to unsetenv("DBUS_ACTIVATION_BUS_TYPE") [0x1c9e480] inhibit interface error: Failed to connect to the D-Bus session daemon: /usr/bin/dbus-launch terminated abnormally with the following error: Autolaunch error: X11 initialization failed. [0x1c9e480] main interface error: no suitable interface module [0x1ca1500] main interface error: no suitable interface module [0x1bb3120] main libvlc error: interface "globalhotkeys,none" initialization failed [0x1c9f940] dummy interface: using the dummy interface module... [0x1ca4850] main access out: creating httpd [0x1ebb340] mux_ogg mux: Open And on my laptop: $ vlc http://192.168.0.2:8080 VLC media player 1.1.4.1 The Luggage (revision exported) Blocked: call to unsetenv("DBUS_ACTIVATION_ADDRESS") Blocked: call to unsetenv("DBUS_ACTIVATION_BUS_TYPE") Blocked: call to setlocale(6, "") Blocked: call to sigaction(17, 0xb25c7058, 0xb25c70e4) Warning: call to signal(13, 0x1) Warning: call to signal(13, 0x1) Blocked: call to setenv("ORBIT_SOCKETDIR", "/tmp/orbit-zf", 1) Warning: call to srand(1287690122) Warning: call to rand() Blocked: call to setlocale(6, "") (process:17933): Gtk-WARNING **: Locale not supported by C library. Using the fallback 'C' locale. Warning: call to signal(13, 0x1) Blocked: call to setlocale(6, "") [0x8af5f04] main stream error: cannot pre fill buffer Any idea why this isn't working?

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• cannot resolve DNS server's own domain name

  - by sims

  I have a DNS server (mega.dude - 123.123.123.123) running bind 9.4. When I: dig mega.dude I get no answer section. I have nameserver 123.123.123.123 in /etc/resolv.conf Here is my zone file: $TTL 1W @ IN SOA mega.dude. names.mega.dude. ( 2009081502 ; serial 3H ; refresh 15M ; retry 1W ; expiry 1D ) ; minimum NS ns1 NS ns2 MX 10 mail.mega.dude. A 123.123.123.123 @ A 123.123.123.123 ns1 A 123.123.123.123 ns2 A 123.123.123.123 www CNAME @ mail A 123.123.123.123 It didn't used to look like this. I read that it's evil to have an mx record pointing to a CNAME. So I changed that. Then I thought maybe that was also the case for NS. So I changed those too. Still no good. The ports are open. I can't figure it out. Oh by the way, all the other zones return fine. But not the servers own domain. So I know I'm doing something stupid. Thanks for your help all!

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• Dynamic subdomain routing

  - by Nader

  Hi everyone, I asked this question over at stackoverflow, but got very few views: http://stackoverflow.com/questions/2284917/route-web-requests-to-different-servers-based-on-subdomain Perhaps it's more applicable to this crowd. Here it is again for convenience: I have a platform where a user can create a new website using a subdomain. There will be thousands of these, eg abc.mydomain.com, def.mydomain.com . Hopefully if we are successful hundreds of thousands. I need to be able to route these domains to a different IPs to point at a particular app server. I have this mapping in a database right now. What are the best practices and recommended technologies here? I see a couple options: Have DNS setup with a wildcard CNAME entry so that all requests go to a single IP where perhaps two machines using heartbeat (for failover) know how to look up the IP in the database and then do an http redirect to the appropriate app server. This seems clunky and slow to me. Run my own DNS server that can be programatically managed such that when a new site is created a DNS entry is added. We also move sites around to different app servers, so I would need to be able to update DNS entries in close to real time. Thoughts anyone? Thanks. Update2: I've setup external wildcard DNS pointing at an HAProxy web server whose job it is to route requests to backend servers. The mapping is stored in our internal PowerDNS server. Question now is how to get the HAProxy server (or another) to use the value of the internal DNS and not some config file or access list? – Update: Based on some suggestions below, it seems like reverse-proxy server(s) is the way to go. As I'll be rebalancing the domain-server mapping, these need to work instantly and the TTL on a DNS solution could be a problem. Any recommendations on software to use considering this domain-IP data is stored in a DB, and I'll need this to be performant?

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• Does NetworkSolutions have a good DNS service?

  - by joxl

  I'm recovering from a DNS disaster and I need some good advice on an alternate solution. My company owns a domain name through NetworkSolutions. Our website is hosted by another company who also maintains our DNS records. Our email is hosted by Google Apps, and the MX records are maintained through the afore-mentioned website/DNS host. Yesterday our website/DNS host had a serious hiccup in some software and completely overwrote all of our DNS records with invalid values; successfully pointing our domain and MX records at the wrong servers. Unfortunately it wasn't caught until it had time to significantly propagate. On top of that, it wasn't fixed until several hours later, combine that with a long TTL on the records; we have customers who are still bouncing emails. Anyhow, I am now completely terrified of this company's ability to do a good job, so I am considering switching to NetworkSolutions for our DNS service. I need the ability to configure A, CNAME, MX, and TXT records, preferably with a nice user interface (our current provider has a poor UI and doesn't support TXT records). Is NetworkSolutions a recommended DNS host? I am a little biased in their direction because the service will be free since we already pay them for our domain name. However I'm curious what others have experienced with their service.

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• switching dns server providers

  - by Yoav Aner

  I'm trying to wrap my head around something that I thought I kinda understood, but clearly there's some piece missing. We're currently using Zerigo as our primary dns, with slave dns running on linode. This works quite well. However, recent DDOS attacks on zerigo meant that whilst dns queries were still resolved, we were unable to make any dns changes. Since we rely on dns changes on our own infrastructure, I'm looking to improve this somehow. I'd rather not ditch zerigo completely, and realise that this or similar problems can happen with ANY primary dns hosting provider. It might not be DDOS, but a bug on their server, or something that means we can no longer issue updates. For this I want to have some fallback option: a completely independent (primary) dns provider (maybe AWS), which we will keep in-sync manually. We will switch-over to it when there's a problem. This brings me to my question: How do I make sure we can switch those providers quickly enough? specifically, on our registrar, there's a list of name servers, but no settings like TTL etc. How do dns clients know to use the newly updated name server records? Is this configured in the SOA? However, the SOA itself is hosted with the dns provider and we might not be able to update it... This is not a question about a one-time move, which can be planned and scheduled and tested, but rather to be able to do so when things are half-broken.

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• ipmi - can't ping or remotely connect

  - by Fidel

  I've tried configuring the IPMI controller to accept remote connections, but I can't even ping it. Here is it status: #/usr/local/bin/ipmitool lan print 2 Set in Progress : Set Complete Auth Type Support : NONE PASSWORD Auth Type Enable : Callback : : User : NONE PASSWORD : Operator : PASSWORD : Admin : PASSWORD : OEM : IP Address Source : Static Address IP Address : 192.168.1.112 Subnet Mask : 255.255.255.0 MAC Address : 00:a0:a5:67:45:25 IP Header : TTL=0x40 Flags=0x40 Precedence=0x00 TOS=0x10 BMC ARP Control : ARP Responses Enabled, Gratuitous ARP Enabled Gratituous ARP Intrvl : 8.0 seconds Default Gateway IP : 192.168.1.1 Default Gateway MAC : 00:00:00:00:00:00 802.1q VLAN ID : Disabled 802.1q VLAN Priority : 0 RMCP+ Cipher Suites : 0,1,2,3 Cipher Suite Priv Max : uaaaXXXXXXXXXXX : X=Cipher Suite Unused : c=CALLBACK : u=USER : o=OPERATOR : a=ADMIN : O=OEM # /usr/local/bin/ipmitool user list 2 ID Name Enabled Callin Link Auth IPMI Msg Channel Priv Limit 1 true false true true USER 2 admin true false true true ADMINISTRATOR # /usr/local/bin/ipmitool channel getaccess 2 2 Maximum User IDs : 5 Enabled User IDs : 2 User ID : 2 User Name : admin Fixed Name : No Access Available : callback Link Authentication : enabled IPMI Messaging : enabled Privilege Level : ADMINISTRATOR # /usr/local/bin/ipmitool channel info 2 Channel 0x2 info: Channel Medium Type : 802.3 LAN Channel Protocol Type : IPMB-1.0 Session Support : multi-session Active Session Count : 0 Protocol Vendor ID : 7154 Volatile(active) Settings Alerting : disabled Per-message Auth : disabled User Level Auth : disabled Access Mode : always available Non-Volatile Settings Alerting : disabled Per-message Auth : disabled User Level Auth : disabled Access Mode : always available # /usr/local/bin/ipmitool chassis status System Power : on Power Overload : false Power Interlock : inactive Main Power Fault : false Power Control Fault : false Power Restore Policy : unknown Last Power Event : Chassis Intrusion : inactive Front-Panel Lockout : inactive Drive Fault : false Cooling/Fan Fault : false # arp Address HWtype HWaddress Flags Mask Iface 192.168.1.112 ether 00:A0:A5:67:45:25 C bond0 # /usr/local/bin/ipmitool -I lan -H 192.168.1.112 -U admin -P admin chassis power status Error: Unable to establish LAN session Unable to get Chassis Power Status In summary. It exists on the ARP list so arp's are being broadcast. I can't ping it and can't connect to it. Can anyone spot any glaring mistakes in the configuration? Many thanks, Fidel

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• configure server and create website without any control panel

  - by Emad Ahmed

  i am trying to configure my new server without cpanel i've installed php/mysql/apache And it's now working fine if you visit the server ip http://46.166.129.101/ you'll see the welcome page i've configured my dns too my nameserverips file [root@server]# cat /etc/nameserverips 46.166.129.101=ns1.isellsoftwares.com 46.166.129.101=ns2.isellsoftwares.com if you visit this link http://ns1.isellsoftwares.com you'll see the welcome page too!! but if you visit isellsoftwares.com you'll see ( 'Firefox can't find the server at www.isellsoftwares.com.' ) Now my question is: How to create an account for this domain on the server?? i've tryied to add virtualHost tag in apache <VirtualHost *:80> ServerAdmin [email protected] ServerAlias www.isellsoftwares.com DocumentRoot /var/www/html/issoft ServerName isellsoftwares.com ErrorLog logs/dummy-host.example.com-error_log CustomLog logs/dummy-host.example.com-access_log common </VirtualHost> it still not working ... i've added named file for this domain (( isellsoftwares.com.db )) ; Zone file for isellsoftwares.com $TTL 14400 isellsoftwares.com. 86400 IN SOA ns1.isellsoftwares.com. elsolgan.yahoo.com. ( 2012031500 ;Serial Number 86400 ;refresh 7200 ;retry 3600000 ;expire 86400 ;minimum ) isellsoftwares.com. 86400 IN NS ns1.isellsoftwares.com. isellsoftwares.com. 86400 IN NS ns2.isellsoftwares.com. isellsoftwares.com. 14400 IN A 46.166.129.101 localhost 14400 IN A 127.0.0.1 isellsoftwares.com. 14400 IN MX 0 isellsoftwares.com. mail 14400 IN A 46.166.129.101 www 14400 IN CNAME isellsoftwares.com. ftp 14400 IN A 46.166.129.101 cpanel 14400 IN A 46.166.129.101 whm 14400 IN A 46.166.129.101 webmail 14400 IN A 46.166.129.101 webdisk 14400 IN A 46.166.129.101 ns1 14400 IN A 46.166.129.101 ns2 14400 IN A 46.166.129.101 but it still not working !!!!! So, what else i should do??

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• Using public interfaces on a server connected through a GRE tunnel

  - by Evan

  I'm pretty new to networking so please forgive any terminology mistakes. I have 2 servers connected with a GRE tunnel. Server1 (10.0.0.1) ---- Server2 (10.0.0.2) I want to be able to bind to the public IPs on Server2 using Server1. To do this, I setup virtual interfaces with Server2's public IPs on Server1 and then used routing rules on Server1 to route the packets through the GRE tunnel. On Server1: ip rule add from [Server2's first public IP] table gre ip rule add from [Server2's second public IP] table gre ip route add default via 10.0.0.2 dev gre1 table gre This works great and I can see the packets arriving via GRE on Server2. I can see the packet exiting the tunnel on Server2's gre1 device as shown: From Server1: ping -I [Server2's public ip] google.com tcpdump from Server2's GRE tunnel device: 12:07:17.029160 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto ICMP (1), length 84) [Server2's public ip] > 74.125.225.38: ICMP echo request, id 6378, seq 50, length 64 This is exactly the packet I want. However, I'm not seeing it go out at all on eth0:0 (where Server2's public IP is bound to). I've tried to use routing rules to get packets coming from Server2's public IP (which would be coming out of dev gre1) to go through dev eth0 on the public default gateway and that doesn't work either. I'm at a loss, thank you to anyone who can help.

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• Setting up WHM nameservers

  - by Miskone

  I am new to server administration and I've just got a dedicated root server from Hetzner. First I set up in Hetzner's robot DNS entries Registered nameservers: ns1.raybear.com 88.198.32.57 ns2.raybear.com 88.198.32.57 Under DNS entires I have buzz-buzz.me pointing to 88.198.32.57 // My server IP address and on my WHM I have DNS zone for buzz-buzz.me ; cPanel first:11.42.1.17 (update_time):1402062640 Cpanel::ZoneFile::VERSION:1.3 hostname:hosting.raybear.com latest:11.42.1.17 ; Zone file for buzz-buzz.me $TTL 14400 buzz-buzz.me. 86400 IN SOA ns1.raybear.com. miskone.gmail.com. ( 2014060605 ;Serial Number 86400 ;refresh 7200 ;retry 3600000 ;expire 86400 ) buzz-buzz.me. 86400 IN NS ns1.raybear.com. buzz-buzz.me. 86400 IN NS ns2.raybear.com. buzz-buzz.me. 14400 IN A 88.198.32.57 localhost 14400 IN A 127.0.0.1 buzz-buzz.me. 14400 IN MX 0 buzz-buzz.me. mail 14400 IN CNAME buzz-buzz.me. www 14400 IN CNAME buzz-buzz.me. ftp 14400 IN CNAME buzz-buzz.me. agent 14400 IN A 88.198.32.57 src 14400 IN A 88.198.32.57 platform 14400 IN A 88.198.32.57 But still I have some problems accesing buzz-buzz.me, agent.buzz-buzz.me and platform.buzz-buzz.me Also I have problem getting mails on Google account, I can send but not receive emails. How to solve this. As I said I am completly new here and I need urgent help.:(

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