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• Macbook Pro Wireless Reconnecting

  - by A Student at a University

  I'm using a WPA2 EAP network. I'm sitting next to the access point. The connection keeps dropping and taking ~10 seconds to reconnect. My other devices are staying online. What's causing it? syslog: 01:21:10 dhclient: DHCPREQUEST of XXX.XXX.XXX.XXX on eth1 to XXX.XXX.XXX.XXX port 67 01:21:10 dhclient: DHCPACK of XXX.XXX.XXX.XXX from XXX.XXX.XXX.XXX 01:21:10 NetworkManager[XX40]: <info> (eth1): DHCPv4 state changed reboot -> renew 01:21:10 NetworkManager[XX40]: <info> address XXX.XXX.XXX.XXX 01:21:10 NetworkManager[XX40]: <info> prefix 20 (XXX.XXX.XXX.XXX) 01:21:10 NetworkManager[XX40]: <info> gateway XXX.XXX.XXX.XXX 01:21:10 NetworkManager[XX40]: <info> nameserver 'XXX.XXX.XXX.XXX' 01:21:10 NetworkManager[XX40]: <info> nameserver 'XXX.XXX.XXX.XXX' 01:21:10 NetworkManager[XX40]: <info> nameserver 'XXX.XXX.XXX.XXX' 01:21:10 NetworkManager[XX40]: <info> domain name 'server.domain.tld' 01:21:10 dhclient: bound to XXX.XXX.XXX.XXX -- renewal in XXX seconds. 01:33:30 dhclient: DHCPREQUEST of XXX.XXX.XXX.XXX on eth1 to XXX.XXX.XXX.XXX port 67 01:33:30 dhclient: DHCPACK of XXX.XXX.XXX.XXX from XXX.XXX.XXX.XXX 01:33:30 dhclient: bound to XXX.XXX.XXX.XXX -- renewal in XXX seconds. 01:35:13 wpa_supplicant[XX60]: CTRL-EVENT-EAP-STARTED EAP authentication started 01:35:13 wpa_supplicant[XX60]: CTRL-EVENT-EAP-METHOD EAP vendor 0 method 25 (PEAP) selected 01:35:14 wpa_supplicant[XX60]: EAP-MSCHAPV2: Authentication succeeded 01:35:14 wpa_supplicant[XX60]: EAP-TLV: TLV Result - Success - EAP-TLV/Phase2 Completed 01:35:14 wpa_supplicant[XX60]: CTRL-EVENT-EAP-SUCCESS EAP authentication completed successfully 01:35:14 NetworkManager[XX40]: <info> (eth1): supplicant connection state: completed -> 4-way handshake 01:35:14 wpa_supplicant[XX60]: WPA: Key negotiation completed with XX:XX:XX:XX:XX:XX [PTK=CCMP GTK=TKIP] 01:35:14 NetworkManager[XX40]: <info> (eth1): supplicant connection state: 4-way handshake -> group handshake 01:35:14 NetworkManager[XX40]: <info> (eth1): supplicant connection state: group handshake -> completed 01:35:17 wpa_supplicant[XX60]: CTRL-EVENT-DISCONNECTED - Disconnect event - remove keys 01:35:17 NetworkManager[XX40]: <info> (eth1): supplicant connection state: completed -> disconnected 01:35:17 NetworkManager[XX40]: <info> (eth1): supplicant connection state: disconnected -> scanning 01:35:26 wpa_supplicant[XX60]: CTRL-EVENT-DISCONNECTED - Disconnect event - remove keys 01:35:26 NetworkManager[XX40]: <info> (eth1): supplicant connection state: scanning -> disconnected 01:35:29 NetworkManager[XX40]: <info> (eth1): supplicant connection state: disconnected -> scanning 01:35:32 NetworkManager[XX40]: <info> (eth1): device state change: 8 -> 3 (reason 11) 01:35:32 NetworkManager[XX40]: <info> (eth1): deactivating device (reason: 11). 01:35:32 NetworkManager[XX40]: <info> (eth1): canceled DHCP transaction, DHCP client pid XX27 01:35:32 NetworkManager[XX40]: <info> Activation (eth1) starting connection 'Auto XXXXXXXXXX' 01:35:32 NetworkManager[XX40]: <info> (eth1): device state change: 3 -> 4 (reason 0) 01:35:32 NetworkManager[XX40]: <info> Activation (eth1) Stage 1 of 5 (Device Prepare) scheduled... 01:35:32 NetworkManager[XX40]: <info> (eth1): supplicant connection state: scanning -> disconnected 01:35:32 NetworkManager[XX40]: <info> Activation (eth1) Stage 1 of 5 (Device Prepare) started... 01:35:32 NetworkManager[XX40]: <info> Activation (eth1) Stage 2 of 5 (Device Configure) scheduled... 01:35:32 NetworkManager[XX40]: <info> Activation (eth1) Stage 1 of 5 (Device Prepare) complete. 01:35:32 NetworkManager[XX40]: <info> Activation (eth1) Stage 2 of 5 (Device Configure) starting... 01:35:32 NetworkManager[XX40]: <info> (eth1): device state change: 4 -> 5 (reason 0) 01:35:32 NetworkManager[XX40]: <info> Activation (eth1/wireless): access point 'Auto XXXXXXXXXX' has security, but secrets are required. 01:35:32 NetworkManager[XX40]: <info> (eth1): device state change: 5 -> 6 (reason 0) 01:35:32 NetworkManager[XX40]: <info> Activation (eth1) Stage 2 of 5 (Device Configure) complete. 01:35:32 NetworkManager[XX40]: <info> Activation (eth1) Stage 1 of 5 (Device Prepare) scheduled... 01:35:32 NetworkManager[XX40]: <info> Activation (eth1) Stage 1 of 5 (Device Prepare) started... 01:35:32 NetworkManager[XX40]: <info> (eth1): device state change: 6 -> 4 (reason 0) 01:35:32 NetworkManager[XX40]: <info> Activation (eth1) Stage 2 of 5 (Device Configure) scheduled... 01:35:32 NetworkManager[XX40]: <info> Activation (eth1) Stage 1 of 5 (Device Prepare) complete. 01:35:32 NetworkManager[XX40]: <info> Activation (eth1) Stage 2 of 5 (Device Configure) starting... 01:35:32 NetworkManager[XX40]: <info> (eth1): device state change: 4 -> 5 (reason 0) 01:35:32 NetworkManager[XX40]: <info> Activation (eth1/wireless): connection 'Auto XXXXXXXXXX' has security, and secrets exist. No new secrets needed. 01:35:32 NetworkManager[XX40]: <info> Config: added 'ssid' value 'XXXXXXXXXX' 01:35:32 NetworkManager[XX40]: <info> Config: added 'scan_ssid' value '1' 01:35:32 NetworkManager[XX40]: <info> Config: added 'key_mgmt' value 'WPA-EAP' 01:35:32 NetworkManager[XX40]: <info> Config: added 'password' value '<omitted>' 01:35:32 NetworkManager[XX40]: <info> Config: added 'eap' value 'PEAP' 01:35:32 NetworkManager[XX40]: <info> Config: added 'fragment_size' value 'XXX0' 01:35:32 NetworkManager[XX40]: <info> Config: added 'phase2' value 'auth=MSCHAPV2' 01:35:32 NetworkManager[XX40]: <info> Config: added 'ca_cert' value '/etc/ssl/certs/Equifax_Secure_CA.pem' 01:35:32 NetworkManager[XX40]: <info> Config: added 'identity' value 'XXXXXXX' 01:35:32 NetworkManager[XX40]: <info> Activation (eth1) Stage 2 of 5 (Device Configure) complete. 01:35:32 NetworkManager[XX40]: <info> Config: set interface ap_scan to 1 01:35:32 NetworkManager[XX40]: <info> (eth1): supplicant connection state: disconnected -> scanning 01:35:36 wpa_supplicant[XX60]: Associated with XX:XX:XX:XX:XX:XX 01:35:36 NetworkManager[XX40]: <info> (eth1): supplicant connection state: scanning -> associated 01:35:36 wpa_supplicant[XX60]: CTRL-EVENT-EAP-STARTED EAP authentication started 01:35:36 wpa_supplicant[XX60]: CTRL-EVENT-EAP-METHOD EAP vendor 0 method 25 (PEAP) selected 01:35:36 wpa_supplicant[XX60]: EAP-MSCHAPV2: Authentication succeeded 01:35:36 wpa_supplicant[XX60]: EAP-TLV: TLV Result - Success - EAP-TLV/Phase2 Completed 01:35:36 wpa_supplicant[XX60]: CTRL-EVENT-EAP-SUCCESS EAP authentication completed successfully 01:35:36 NetworkManager[XX40]: <info> (eth1): supplicant connection state: associated -> 4-way handshake 01:35:36 wpa_supplicant[XX60]: WPA: Could not find AP from the scan results 01:35:36 wpa_supplicant[XX60]: WPA: Key negotiation completed with XX:XX:XX:XX:XX:XX [PTK=CCMP GTK=TKIP] 01:35:36 wpa_supplicant[XX60]: CTRL-EVENT-CONNECTED - Connection to XX:XX:XX:XX:XX:XX completed (reauth) [id=0 id_str=] 01:35:36 NetworkManager[XX40]: <info> (eth1): supplicant connection state: 4-way handshake -> group handshake 01:35:36 NetworkManager[XX40]: <info> (eth1): supplicant connection state: group handshake -> completed 01:35:36 NetworkManager[XX40]: <info> Activation (eth1/wireless) Stage 2 of 5 (Device Configure) successful. Connected to wireless network 'XXXXXXXXXX'. 01:35:36 NetworkManager[XX40]: <info> Activation (eth1) Stage 3 of 5 (IP Configure Start) scheduled. 01:35:36 NetworkManager[XX40]: <info> Activation (eth1) Stage 3 of 5 (IP Configure Start) started... 01:35:36 NetworkManager[XX40]: <info> (eth1): device state change: 5 -> 7 (reason 0) 01:35:36 NetworkManager[XX40]: <info> Activation (eth1) Beginning DHCPv4 transaction (timeout in 45 seconds) 01:35:36 NetworkManager[XX40]: <info> dhclient started with pid XX87 01:35:36 NetworkManager[XX40]: <info> Activation (eth1) Stage 3 of 5 (IP Configure Start) complete. 01:35:36 dhclient: Internet Systems Consortium DHCP Client VXXX.XXX.XXX 01:35:36 dhclient: Copyright 2004-2009 Internet Systems Consortium. 01:35:36 dhclient: All rights reserved. 01:35:36 dhclient: For info, please visit https://www.isc.org/software/dhcp/ 01:35:36 dhclient: 01:35:36 NetworkManager[XX40]: <info> (eth1): DHCPv4 state changed nbi -> preinit 01:35:36 dhclient: Listening on LPF/eth1/XX:XX:XX:XX:XX:XX 01:35:36 dhclient: Sending on LPF/eth1/XX:XX:XX:XX:XX:XX 01:35:36 dhclient: Sending on Socket/fallback 01:35:36 dhclient: DHCPREQUEST of XXX.XXX.XXX.XXX on eth1 to XXX.XXX.XXX.XXX port 67 01:35:36 dhclient: DHCPACK of XXX.XXX.XXX.XXX from XXX.XXX.XXX.XXX 01:35:36 dhclient: bound to XXX.XXX.XXX.XXX -- renewal in XXX seconds. 01:35:36 NetworkManager[XX40]: <info> (eth1): DHCPv4 state changed preinit -> reboot 01:35:36 NetworkManager[XX40]: <info> Activation (eth1) Stage 4 of 5 (IP4 Configure Get) scheduled... 01:35:36 NetworkManager[XX40]: <info> Activation (eth1) Stage 4 of 5 (IP4 Configure Get) started... 01:35:36 NetworkManager[XX40]: <info> address XXX.XXX.XXX.XXX 01:35:36 NetworkManager[XX40]: <info> prefix 20 (XXX.XXX.XXX.XXX) 01:35:36 NetworkManager[XX40]: <info> gateway XXX.XXX.XXX.XXX 01:35:36 NetworkManager[XX40]: <info> nameserver 'XXX.XXX.XXX.XXX' 01:35:36 NetworkManager[XX40]: <info> nameserver 'XXX.XXX.XXX.XXX' 01:35:36 NetworkManager[XX40]: <info> nameserver 'XXX.XXX.XXX.XXX' 01:35:36 NetworkManager[XX40]: <info> domain name 'server.domain.tld' 01:35:36 NetworkManager[XX40]: <info> Activation (eth1) Stage 5 of 5 (IP Configure Commit) scheduled... 01:35:36 NetworkManager[XX40]: <info> Activation (eth1) Stage 4 of 5 (IP4 Configure Get) complete. 01:35:36 NetworkManager[XX40]: <info> Activation (eth1) Stage 5 of 5 (IP Configure Commit) started... 01:35:37 NetworkManager[XX40]: <info> (eth1): device state change: 7 -> 8 (reason 0) 01:35:37 NetworkManager[XX40]: <info> (eth1): roamed from BSSID XX:XX:XX:XX:XX:XX (XXXXXXXXXX) to XX:XX:XX:XX:XX:XX (XXXXXXXXX) 01:35:37 NetworkManager[XX40]: <info> Policy set 'Auto XXXXXXXXXX' (eth1) as default for IPv4 routing and DNS. 01:35:37 NetworkManager[XX40]: <info> Activation (eth1) successful, device activated. 01:35:37 NetworkManager[XX40]: <info> Activation (eth1) Stage 5 of 5 (IP Configure Commit) complete. 01:35:43 wpa_supplicant[XX60]: Trying to associate with XX:XX:XX:XX:XX:XX (SSID='XXXXXXXXXX' freq=2412 MHz) 01:35:43 NetworkManager[XX40]: <info> (eth1): supplicant connection state: completed -> associating 01:35:43 wpa_supplicant[XX60]: Association request to the driver failed 01:35:46 wpa_supplicant[XX60]: Associated with XX:XX:XX:XX:XX:XX 01:35:46 NetworkManager[XX40]: <info> (eth1): supplicant connection state: associating -> associated 01:35:46 NetworkManager[XX40]: <info> (eth1): supplicant connection state: associated -> 4-way handshake 01:35:46 wpa_supplicant[XX60]: WPA: Key negotiation completed with XX:XX:XX:XX:XX:XX [PTK=CCMP GTK=TKIP] 01:35:46 wpa_supplicant[XX60]: CTRL-EVENT-CONNECTED - Connection to XX:XX:XX:XX:XX:XX completed (reauth) [id=0 id_str=] 01:35:46 NetworkManager[XX40]: <info> (eth1): supplicant connection state: 4-way handshake -> group handshake 01:35:46 NetworkManager[XX40]: <info> (eth1): supplicant connection state: group handshake -> completed 01:40:47 wpa_supplicant[XX60]: WPA: Group rekeying completed with XX:XX:XX:XX:XX:XX [GTK=TKIP] 01:40:47 NetworkManager[XX40]: <info> (eth1): supplicant connection state: completed -> group handshake 01:40:47 NetworkManager[XX40]: <info> (eth1): supplicant connection state: group handshake -> completed 01:50:19 dhclient: DHCPREQUEST of XXX.XXX.XXX.XXX on eth1 to XXX.XXX.XXX.XXX port 67 01:50:19 dhclient: DHCPACK of XXX.XXX.XXX.XXX from XXX.XXX.XXX.XXX

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• Errors when switching to specific static IP

  - by michaelc

  I had a Fedora box running using my static IP 69.169.136.6, etc, all configured according to what the ISP required. Just recently the hard drive failed (and I should have been keeping better backups) - while it is being recovered I would like to put up a webpage on my Archlinux PC explaining the problem - I presently do not have sufficient access to change the DNS record assigned to the domain. When I change my ip address while my system is running to 69.169.136.6, ifconfig reports the new ip address, but http://whatismyip.com/ does not. When I change it and reboot, I can't ping - the message I recieve is "connect: Network is unreachable" (when given one of google.com 's IP addresses - hostnames give me ping: unknown host xxx). Until I have access to the DNS system, what can I do to make this work? Edit: With new IP address, same problem, IP is now 69.169.136.29. Some commands might be useful: #ping 69.169.136.1 PING 69.169.136.1 (69.169.136.1) 56(84) bytes of data. 64 bytes from 69.169.136.1: icmp_seq=1 ttl=64 time=0.377 ms #ping 69.169.190.211 connect: Network is unreachable #ping 208.72.160.67 connect: Network is unreachable #ifconfig eth0 Link encap:Ethernet HWaddr 00:E0:4D:97:23:9B inet addr:69.169.136.29 Bcast:69.169.137.255 Mask:255.255.254.0 inet6 addr: fe80::2e0:4dff:fe97:239b/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:132091 errors:0 dropped:0 overruns:0 frame:0 TX packets:17 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:9635179 (9.1 Mb) TX bytes:1322 (1.2 Kb) Interrupt:29 Base address:0x6000 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:48 errors:0 dropped:0 overruns:0 frame:0 TX packets:48 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:2480 (2.4 Kb) TX bytes:2480 (2.4 Kb) #ip route 69.169.136.0/23 dev eth0 proto kernel scope link src 69.169.136.29 #cat /etc/resolv.conf # Generated by dhcpcd #nameserver 208.67.222.222 #nameserver 208.67.220.220 nameserver 69.169.190.211 nameserver 208.72.160.67 # /etc/resolv.conf.tail can replace this line Update: have new static IP addresses, verified to work in Windows... Relevant portions of /etc/rc.conf below: #Static IP example #eth0="eth0 69.169.136.6 netmask 255.255.254.0 broadcast 69.169.136.1" #eth0="eth0 69.169.136.29 netmask 255.255.254.0 broadcast 69.169.137.255" eth0="eth0 69.169.136.32 netmask 255.255.254.0 broadcast 69.169.137.255" #eth0="dhcp" INTERFACES=(eth0) # Routes to start at boot-up (in this order) # Declare each route then list in ROUTES # - prefix an entry in ROUTES with a ! to disable it # #gateway="default gw 192.168.0.1" gateway="default gw 69.169.136.1" #gateway="69.169.136.1" ROUTES=(!gateway) #ROUTES=()

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• Change default DNS server in Arch Linux

  - by AntoineG

  I'm in Viet Nam and most social websites (Facebook, Twitter and the likes - even reddit) are blocked by the ISP DNS server. I tried to change the DNS server of my Arch box using the resolv.conf file, but it failed miserably since dhcpd generates this file automatically everytime I connect to the LAN. I've been looking around to try and find out how to fix this, without success. Either I s*ck at Googling, either it is non-trivial to do so. EDIT 1: Meh, apparently posting it here made me feel guilty and I had to push my search a bit more. I found the same article than Ankur post below. This is what I made, if anybody ever faces the same problem: $ sudo gvim /etc/dhcpcd.conf Add "nohook resolv.conf" at the tail of the file. $ sudo gvim /etc/resolv.conf Add to the file (OpenDNS servers): nameserver 208.67.222.222 nameserver 208.67.220.220 Or (Google DNS): nameserver 8.8.8.8 nameserver 8.8.4.4 Then, verify it worked (need package dnsutils): $ dig www.facebook.com ; <<>> DiG 9.9.1-P1 <<>> www.facebook.com ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 16994 ;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1 ;; OPT PSEUDOSECTION: ; EDNS: version: 0, flags:; udp: 4096 ;; QUESTION SECTION: ;www.facebook.com. IN A ;; ANSWER SECTION: www.facebook.com. 89 IN A 69.171.224.53 ;; Query time: 87 msec ;; SERVER: 208.67.222.222#53(208.67.222.222) ;; WHEN: Thu Jun 28 00:43:23 2012 ;; MSG SIZE rcvd: 61 See ;; SERVER: 208.67.222.222#53(208.67.222.222), it worked.

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• Why is Denic not accepting my nameservers?

  - by Oliver Salzburg

  I'm currently in the process of moving all of our domains to our own nameservers. Which wasn't an issue until I hit our own .de domain. I (think I) understand the implications of having the NS inside it's own domain, hence the need for glue records. Until yesterday, I would have assumed I have a pretty good understanding of Bind and DNS zones until I was presented with this error from the Denic nameserver predelegation check: Inconsistent set of nameserver IP addresses (NS, provided glues, determined glues) ns2.hartwig-at.de [88.198.242.190/88.198.242.190] Default resolver determined: [], other resolvers determined: {88.198.242.190/88.198.242.190=[/2a01:4f8:d13:3c85:0:0:0:2, /88.198.242.190]} Inconsistent set of nameserver IP addresses (NS, provided glues, determined glues) ns1.hartwig-at.de [cloud.hartwig-at.de/176.221.46.23] Default resolver determined: [], other resolvers determined: {cloud.hartwig-at.de/176.221.46.23=[/2a00:1158:3:0:0:0:0:b6, /176.221.46.23]} Screenshot of the result The support of my registrar is either far better educated than me or doesn't have a clue. Either way, they're avoiding my questions in regards to what this error means. They just tell me Your nameserver has to return your own nameservers as the default resolver. But that doesn't make any sense to me and they refuse to try to explain it any other way. This is the head of my current zone file: @ 86400 IN SOA ns1.hartwig-at.de. hostmaster.hartwig-at.de. ( 2012070505 ; serial 1d ; refresh 3h ; retry 4w ; expiry 1h ) ; minimum 3600 IN NS ns1.hartwig-at.de. 3600 IN NS ns2.hartwig-at.de. 3600 IN MX 10 remote.hartwig-at.de. 3600 IN MX 20 mx1.hartwig-at.de. 3600 IN MX 30 mx2.hartwig-at.de. localhost 3600 IN A 127.0.0.1 localhost 3600 IN AAAA ::1 @ 3600 IN A 176.221.46.23 3600 IN AAAA 2a00:1158:3::b6 * 3600 IN A 176.221.46.23 3600 IN AAAA 2a00:1158:3::b6 hetzner 3600 IN A 88.198.242.190 hetzner 3600 IN AAAA 2a01:4f8:d13:3c85::2 cloud 3600 IN A 176.221.46.23 cloud 3600 IN AAAA 2a00:1158:3::b6 ; List all NS as A/AAAA record ns 3600 IN A 176.221.46.23 ns 3600 IN AAAA 2a00:1158:3::b6 ns1 3600 IN A 176.221.46.23 ns1 3600 IN AAAA 2a00:1158:3::b6 ns2 3600 IN A 88.198.242.190 ns2 3600 IN AAAA 2a01:4f8:d13:3c85::2 So, what is the problem with my zone? And what is the "default resolver"?

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• Do glue records in non-circular dns-lookups speed up domain resolution or not?

  - by Joe Hopfgartner

  Doing a lookup for my domain on http://www.intodns.com/ I noticed theese two messages: In Parent section: DNS Parent sent Glue The parent nameserver g.gtld-servers.net is not sending out GLUE for every nameservers listed, meaning he is sending out your nameservers host names without sending the A records of those nameservers. It's ok but you have to know that this will require an extra A lookup that can delay a little the connections to your site. This happens a lot if you have nameservers on different TLD (domain.com for example with nameserver ns.domain.org.) and in NS section: Glue for NS records INFO: GLUE was not sent when I asked your nameservers for your NS records.This is ok but you should know that in this case an extra A record lookup is required in order to get the IPs of your NS records. The nameservers without glue are: 109.230.225.96 84.201.40.52 You can fix this for example by adding A records to your nameservers for the zones listed above. I do perfectly understand that the primary objective of glue records is to resolve circular dependencies. The classic use case: my domain is example.com and I want to have the nameserver ns1.example.com. This will never work because i cannot know the ip of ns1.example.com if I don't fetch example.com and in order to do that I need to fetch it from ns1.example.com. To resolve this deadlock I add a glue record to ns1.example.com containing the ip adress of the nameserver, so this can work out. So this problem does not occour if the nameservers are in a different TLD than the domain i want to look up. But however to fetch the zone information from the nameservers I need to know their ip adress right? And in order to know that i need to fetch the zone the nameservers are in from their respective nameservers, right? (or rather my ISP needs to do that in the background) So an extra lookup that takes time? If I now have glue records, I know the IP adress right away without the need to look it up - so this should speed up the resolution of my domain, shouldnt it? However my DNS zone provider (tecserver.at) replied that this would make no sense because "we are not running ns1.ourdomain.com an ns1.ourdomain.com as authorative NS for ourdomain.com. This would be the only sense for glue records. Tecserver has a glue record because the NS for tecserver.at are ns1.tecserver.at and ns2.tecserver.at. Therefore a glue record is needed for resolution.

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• How do I add changes resolv.conf without getting overwritten?

  - by Sam

  I have migrated to 12.04 from 7.10 finally. I have one last part to complete but I am stumped. I am using puppet on each server, and in the past have used resolv.conf to point to my search to the puppetmaster. search puppetmaster.com nameserver 192.168.1.XXX When trying to use the file on 12.04 resolv.conf the file gets over written when rebooted. I cannot use a static IP for these, so using the /etc/network/interfaces to help me out is a nill point. # Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8) # DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN nameserver 127.0.0.1 Is there a way to get resolvconf to handle this either in the head, tail or base. If there is, are there any examples I can use to tweak on my server. Any help is much appreciated.

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• Internet connection randomly drops out

  - by Dr_Bunsen

  Since a week or 2, I have this random network failures. No error pops up, the system says it's still connected to the internet(wifi and wired). The problem is, I can't connect to anything, even a ping google.com gives no feedback. And after many network-manager resets it will work again, for just a minute, and drop out again. I noticed that the /etc/resolv.conf contains this line: nameserver 127.0.0.1 I left out the "Do not edit" stuff, and after it worked for a second, this line is added: search lan When I change the nameserver to 8.8.8.8, I am still able to connect to anywhere. Does anyone got a clue what is happening here? I will provide any information asked. Thanks in advance p.s. I run Ubuntu 13.04 since lastnight(24-06-2013)

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• Is it possible to trace the delegation path for a DNS lookup?

  - by Josh Glover

  I'm trying to determine why a Nagios host check is failing (hostnames and IPs have been changed to protect the guilty): : jmglov@laurana; host www.foo.com ;; connection timed out; no servers could be reached : jmglov@laurana; for ns in `grep -o '\([0-9]\+[.]\)\{3\}[0-9]\+$' /etc/resolv.conf`; do ping -qc 1 $ns; done PING 192.168.1.1 (192.168.1.1) 56(84) bytes of data. --- 192.168.1.1 ping statistics --- 1 packets transmitted, 1 received, 0% packet loss, time 0ms rtt min/avg/max/mdev = 10.911/10.911/10.911/0.000 ms PING 192.168.1.2 (192.168.1.2) 56(84) bytes of data. --- 192.168.1.2 ping statistics --- 1 packets transmitted, 1 received, 0% packet loss, time 0ms rtt min/avg/max/mdev = 0.241/0.241/0.241/0.000 ms So I know that my nameservers are reachable, meaning that some nameserver along the delegation path to the authoritative nameserver for my host is not responding. Is there an easy way to determine which nameserver this is (basically a traceroute for DNS)?

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• VPN messes up DNS resolution

  - by user124114

  After connecting with the Kerio VPN client (OS X Leopard) to a server, the internet (~web browsing) stopped working for the client. After poking around, the issue seems to be bad DNS server (i.e., entering IPs directly works). After disconnecting from the VPN, the invalid DNS server disappears from scutil --dns and all's well again. Now, I don't understand why OS X on the client even changes the DNS settings -- internet should be routed through a different interface, through the default gateway, not through the VPN. Questions: By what mechanism does connecting the VPN client change the "default" DNS server? How can I stop the VPN client from changing routing/DNS rules? Where is this stuff stored/modified? Before VPN: $ scutil --dns DNS configuration resolver #1 nameserver[0] : 10.66.77.1 # <---- default gateway = home router; all good order : 200000 resolver #2 domain : local options : mdns timeout : 2 order : 300000 ... VPN connected: $ scutil --dns DNS configuration resolver #1 nameserver[0] : 192.168.1.1 # <--- rubbish nameserver[1] : 192.168.2.1 order : 200000 resolver #2 domain : local options : mdns timeout : 2 order : 300000 ... The VPN doesn't appear among $ networksetup -listallnetworkservices.

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• Ubuntu server apt-get says "(-5 - No address associated with hostname)"

  - by Srini

  I have a ubuntu 12.04 server. Running sudo apt-get update on it produces errors like this: W: Failed to fetch http://au.archive.ubuntu.com/ubuntu/dists/precise-backports/main/binary-i386/Packages Something wicked happened resolving 'au.archive.ubuntu.com:http' (-5 - No address associated with hostname) I am able to ping all the other hosts on the network and also Google's DNS 8.8.8.8. But am unable to ping www.google.com. So, I'm guessing something is wrong with my DNS setup, but not sure what. I use static IP and my /etc/network/interfaces looks like this: auto eth0 iface eth0 inet static address 192.168.1.50 netmask 255.255.255.0 network 192.168.1.0 broadcast 192.168.0.255 gateway 192.168.1.1 #dns-nameserver 203.12.160.35 203.12.160.36 #nameserver 203.12.160.35 203.12.160.36 My /etc/resolv.conf and /etc/resolvconf/resolv.conf.d/base are both empty and my /etc/resolvconf/resolv.conf.d/original says: nameserver 192.168.1.1 Any help would be greatly appreciated. P.S. I've googled it a bit and the common resolution is to switch to DHCP which I don't want to do since this is my home server. Thanks Srini

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• Am I obliged to use ipv6 tunnel services if I want to be able to use it?

  - by Zagorax

  I was looking for configuring Slackware to use ipv6 but all instruction I found speak about using an ipv6 tunnel that encapsulate ipv6 request into ipv4 packet and send them to an external router that extracts ipv6 request and sends a reply (or, at least, this is what I understood). Is that necessary? Isn't there a way to configure a pure ipv6 system? If yes, could you please point me to a guide that clearly explain how to enable ipv6 without this trick? I would like to configure my Slackware desktop at first, and then do the same with my Centos server. EDIT: maybe I gave you too few information. Sorry. I'll write some more information thanks to the posted guide. ~$ test -f /proc/net/if_inet6 && echo "Running kernel is IPv6 ready" Running kernel is IPv6 ready So, it seems ipv6 is enabled in my kernel. Some other output from ifconfig, route and /etc/resolv.conf content (with opendns): ~$ /sbin/ifconfig wlan0 | grep inet6 inet6 addr: fe80::21f:3bff:fe60:cc5b/64 Scope:Link ~$ /sbin/route -A inet6 | grep wlan0 fe80::/64 :: U 256 0 0 wlan0 ff00::/8 :: U 256 0 0 wlan0 ~$ cat /etc/resolv.conf inet6 nameserver 2620:0:ccc::2 nameserver 208.67.222.222 nameserver 208.67.220.220 But still, with ping6 I can only ping localhost (::1). Everything else is unreachable. Normal ping works fine. That is why I was asking if I am obliged to use a tunnel.

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• dns queries not using nscd for caching

  - by xenoterracide

  I'm trying to use nscd (Nameservices Cache Daemon) to cache dns locally so I can stop using bind to do it. I've gotten it started and ntpd seems to attempt to use it. But everything else for hosts seems to ignore it. e.g if I do dig apache.org 3 times none of them will hit the cache. I'm viewing the cache stats using nscd -g to determine whether it's been used. I've also turned the debug log level up to see if I can see it hitting and the queries don't even hit nscd. nsswitch.conf # Begin /etc/nsswitch.conf passwd: files group: files shadow: files publickey: files hosts: cache files dns networks: files protocols: files services: files ethers: files rpc: files netgroup: files # End /etc/nsswitch.confenter code here nscd.conf # # /etc/nscd.conf # # An example Name Service Cache config file. This file is needed by nscd. # # Legal entries are: # # logfile <file> # debug-level <level> # threads <initial #threads to use> # max-threads <maximum #threads to use> # server-user <user to run server as instead of root> # server-user is ignored if nscd is started with -S parameters # stat-user <user who is allowed to request statistics> # reload-count unlimited|<number> # paranoia <yes|no> # restart-interval <time in seconds> # # enable-cache <service> <yes|no> # positive-time-to-live <service> <time in seconds> # negative-time-to-live <service> <time in seconds> # suggested-size <service> <prime number> # check-files <service> <yes|no> # persistent <service> <yes|no> # shared <service> <yes|no> # max-db-size <service> <number bytes> # auto-propagate <service> <yes|no> # # Currently supported cache names (services): passwd, group, hosts, services # logfile /var/log/nscd.log threads 4 max-threads 32 server-user nobody # stat-user somebody debug-level 9 # reload-count 5 paranoia no # restart-interval 3600 enable-cache passwd yes positive-time-to-live passwd 600 negative-time-to-live passwd 20 suggested-size passwd 211 check-files passwd yes persistent passwd yes shared passwd yes max-db-size passwd 33554432 auto-propagate passwd yes enable-cache group yes positive-time-to-live group 3600 negative-time-to-live group 60 suggested-size group 211 check-files group yes persistent group yes shared group yes max-db-size group 33554432 auto-propagate group yes enable-cache hosts yes positive-time-to-live hosts 3600 negative-time-to-live hosts 20 suggested-size hosts 211 check-files hosts yes persistent hosts yes shared hosts yes max-db-size hosts 33554432 enable-cache services yes positive-time-to-live services 28800 negative-time-to-live services 20 suggested-size services 211 check-files services yes persistent services yes shared services yes max-db-size services 33554432 resolv.conf # Generated by dhcpcd from eth0 nameserver 127.0.0.1 domain westell.com nameserver 192.168.1.1 nameserver 208.67.222.222 nameserver 208.67.220.220 as kind of a side note I'm using archlinux.

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• dns queries not using nscd for caching

  - by xenoterracide

  I'm trying to use nscd (Nameservices Cache Daemon) to cache dns locally so I can stop using bind to do it. I've gotten it started and ntpd seems to attempt to use it. But everything else for hosts seems to ignore it. e.g if I do dig apache.org 3 times none of them will hit the cache. I'm viewing the cache stats using nscd -g to determine whether it's been used. I've also turned the debug log level up to see if I can see it hitting and the queries don't even hit nscd. nsswitch.conf # Begin /etc/nsswitch.conf passwd: files group: files shadow: files publickey: files hosts: cache files dns networks: files protocols: files services: files ethers: files rpc: files netgroup: files # End /etc/nsswitch.confenter code here nscd.conf # # /etc/nscd.conf # # An example Name Service Cache config file. This file is needed by nscd. # # Legal entries are: # # logfile <file> # debug-level <level> # threads <initial #threads to use> # max-threads <maximum #threads to use> # server-user <user to run server as instead of root> # server-user is ignored if nscd is started with -S parameters # stat-user <user who is allowed to request statistics> # reload-count unlimited|<number> # paranoia <yes|no> # restart-interval <time in seconds> # # enable-cache <service> <yes|no> # positive-time-to-live <service> <time in seconds> # negative-time-to-live <service> <time in seconds> # suggested-size <service> <prime number> # check-files <service> <yes|no> # persistent <service> <yes|no> # shared <service> <yes|no> # max-db-size <service> <number bytes> # auto-propagate <service> <yes|no> # # Currently supported cache names (services): passwd, group, hosts, services # logfile /var/log/nscd.log threads 4 max-threads 32 server-user nobody # stat-user somebody debug-level 9 # reload-count 5 paranoia no # restart-interval 3600 enable-cache passwd yes positive-time-to-live passwd 600 negative-time-to-live passwd 20 suggested-size passwd 211 check-files passwd yes persistent passwd yes shared passwd yes max-db-size passwd 33554432 auto-propagate passwd yes enable-cache group yes positive-time-to-live group 3600 negative-time-to-live group 60 suggested-size group 211 check-files group yes persistent group yes shared group yes max-db-size group 33554432 auto-propagate group yes enable-cache hosts yes positive-time-to-live hosts 3600 negative-time-to-live hosts 20 suggested-size hosts 211 check-files hosts yes persistent hosts yes shared hosts yes max-db-size hosts 33554432 enable-cache services yes positive-time-to-live services 28800 negative-time-to-live services 20 suggested-size services 211 check-files services yes persistent services yes shared services yes max-db-size services 33554432 resolv.conf # Generated by dhcpcd from eth0 nameserver 127.0.0.1 domain westell.com nameserver 192.168.1.1 nameserver 208.67.222.222 nameserver 208.67.220.220 as kind of a side note I'm using archlinux.

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• Wifi hotspot disconnected after some time

  - by Rohit Bansal

  I am trying to use my Ubuntu system as Wifi Hotspot, but for some reason Hotspot get disconnected on its own. Searching for the solution, I found this help : Why is my ethernet connection connecting and disconnecting repeatedly? Reading through the above article I used the following command sudo killall dnsmasq as a result I manage to establish hotspot for around 5-10 sec before getting disconnected as against immediately.... Here's the system log (in case needed) tail -f /var/log/syslog : Apr 1 23:31:42 NetworkManager[901]: <info> Starting dnsmasq... Apr 1 23:31:42 NetworkManager[901]: <info> (wlan0): device state change: ip-config -> activated (reason 'none') [70 100 0] Apr 1 23:31:42 dnsmasq[4159]: started, version 2.57 cachesize 150 Apr 1 23:31:42 dnsmasq[4159]: compile time options: IPv6 GNU-getopt DBus I18N DHCP TFTP IDN Apr 1 23:31:42 dnsmasq-dhcp[4159]: DHCP, IP range 10.42.43.10 -- 10.42.43.100, lease time 1h Apr 1 23:31:42 dnsmasq[4159]: reading /etc/resolv.conf Apr 1 23:31:42 dnsmasq[4159]: using nameserver 220.226.6.104#53 Apr 1 23:31:42 dnsmasq[4159]: using nameserver 220.226.100.40#53 Apr 1 23:31:42 dnsmasq[4159]: cleared cache Apr 1 23:31:42 NetworkManager[901]: <info> Activation (wlan0) successful, device activated. Apr 1 23:31:42 NetworkManager[901]: <info> Activation (wlan0) Stage 5 of 5 (IP Configure Commit) complete. Apr 1 23:31:42 NetworkManager[901]: <info> Activation (wlan0) Stage 4 of 5 (IP4 Configure Get) complete. Apr 1 23:31:42 dbus[885]: [system] Activating service name='org.freedesktop.nm_dispatcher' (using servicehelper) Apr 1 23:31:42 dbus[885]: [system] Successfully activated service 'org.freedesktop.nm_dispatcher' Connection established at this point....now disconnecting after 10 sec... Apr 1 23:31:52 ntpdate[4194]: adjust time server 91.189.94.4 offset -0.011589 sec Apr 1 23:32:01 NetworkManager[901]: <info> (wlan0): IP6 addrconf timed out or failed. Apr 1 23:32:01 NetworkManager[901]: <info> Activation (wlan0) Stage 4 of 5 (IP6 Configure Timeout) scheduled... Apr 1 23:32:01 NetworkManager[901]: <info> Activation (wlan0) Stage 4 of 5 (IP6 Configure Timeout) started... Apr 1 23:32:01 NetworkManager[901]: <info> Activation (wlan0) Stage 5 of 5 (IP Configure Commit) started... Apr 1 23:32:01 NetworkManager[901]: <info> Executing: /sbin/iptables --table filter --insert INPUT --in-interface wlan0 --protocol tcp --destination-port 53 --jump ACCEPT Apr 1 23:32:01 NetworkManager[901]: <info> Executing: /sbin/iptables --table filter --insert INPUT --in-interface wlan0 --protocol udp --destination-port 53 --jump ACCEPT Apr 1 23:32:01 NetworkManager[901]: <info> Executing: /sbin/iptables --table filter --insert INPUT --in-interface wlan0 --protocol tcp --destination-port 67 --jump ACCEPT Apr 1 23:32:01 NetworkManager[901]: <info> Executing: /sbin/iptables --table filter --insert INPUT --in-interface wlan0 --protocol udp --destination-port 67 --jump ACCEPT Apr 1 23:32:01 NetworkManager[901]: <info> Executing: /sbin/iptables --table filter --insert FORWARD --in-interface wlan0 --jump REJECT Apr 1 23:32:01 NetworkManager[901]: <info> Executing: /sbin/iptables --table filter --insert FORWARD --out-interface wlan0 --jump REJECT Apr 1 23:32:01 NetworkManager[901]: <info> Executing: /sbin/iptables --table filter --insert FORWARD --in-interface wlan0 --out-interface wlan0 --jump ACCEPT Apr 1 23:32:01 NetworkManager[901]: <info> Executing: /sbin/iptables --table filter --insert FORWARD --source 10.42.43.0/255.255.255.0 --in-interface wlan0 --jump ACCEPT Apr 1 23:32:01 NetworkManager[901]: <info> Executing: /sbin/iptables --table filter --insert FORWARD --destination 10.42.43.0/255.255.255.0 --out-interface wlan0 --match state --state ESTABLISHED,RELATED --jump ACCEPT Apr 1 23:32:01 NetworkManager[901]: <info> Executing: /sbin/iptables --table nat --insert POSTROUTING --source 10.42.43.0/255.255.255.0 ! --destination 10.42.43.0/255.255.255.0 --jump MASQUERADE Apr 1 23:32:01 NetworkManager[901]: <info> Executing: /sbin/iptables --table filter --insert INPUT --in-interface wlan0 --protocol tcp --destination-port 53 --jump ACCEPT Apr 1 23:32:01 NetworkManager[901]: <info> Executing: /sbin/iptables --table filter --insert INPUT --in-interface wlan0 --protocol udp --destination-port 53 --jump ACCEPT Apr 1 23:32:01 NetworkManager[901]: <info> Executing: /sbin/iptables --table filter --insert INPUT --in-interface wlan0 --protocol tcp --destination-port 67 --jump ACCEPT Apr 1 23:32:01 NetworkManager[901]: <info> Executing: /sbin/iptables --table filter --insert INPUT --in-interface wlan0 --protocol udp --destination-port 67 --jump ACCEPT Apr 1 23:32:01 NetworkManager[901]: <info> Executing: /sbin/iptables --table filter --insert FORWARD --in-interface wlan0 --jump REJECT Apr 1 23:32:01 NetworkManager[901]: <info> Executing: /sbin/iptables --table filter --insert FORWARD --out-interface wlan0 --jump REJECT Apr 1 23:32:01 NetworkManager[901]: <info> Executing: /sbin/iptables --table filter --insert FORWARD --in-interface wlan0 --out-interface wlan0 --jump ACCEPT Apr 1 23:32:01 NetworkManager[901]: <info> Executing: /sbin/iptables --table filter --insert FORWARD --source 10.42.43.0/255.255.255.0 --in-interface wlan0 --jump ACCEPT Apr 1 23:32:01 NetworkManager[901]: <info> Executing: /sbin/iptables --table filter --insert FORWARD --destination 10.42.43.0/255.255.255.0 --out-interface wlan0 --match state --state ESTABLISHED,RELATED --jump ACCEPT Apr 1 23:32:01 NetworkManager[901]: <info> Executing: /sbin/iptables --table nat --insert POSTROUTING --source 10.42.43.0/255.255.255.0 ! --destination 10.42.43.0/255.255.255.0 --jump MASQUERADE Apr 1 23:32:01 NetworkManager[901]: <info> Starting dnsmasq... Apr 1 23:32:01 NetworkManager[901]: <info> Activation (wlan0) Stage 5 of 5 (IP Configure Commit) complete. Apr 1 23:32:01 NetworkManager[901]: <info> Activation (wlan0) Stage 4 of 5 (IP6 Configure Timeout) complete. Apr 1 23:32:01 NetworkManager[901]: <warn> dnsmasq died with signal 9 Apr 1 23:32:01 NetworkManager[901]: <info> (wlan0): device state change: activated -> failed (reason 'sharing-start-failed') [100 120 18] Apr 1 23:32:01 dnsmasq[4235]: started, version 2.57 cachesize 150 Apr 1 23:32:01 dnsmasq[4235]: compile time options: IPv6 GNU-getopt DBus I18N DHCP TFTP IDN Apr 1 23:32:01 dnsmasq-dhcp[4235]: DHCP, IP range 10.42.43.10 -- 10.42.43.100, lease time 1h Apr 1 23:32:01 NetworkManager[901]: <warn> Activation (wlan0) failed for access point (Reppify Ubuntu) Apr 1 23:32:01 dnsmasq[4235]: reading /etc/resolv.conf Apr 1 23:32:01 dnsmasq[4235]: using nameserver 220.226.6.104#53 Apr 1 23:32:01 dnsmasq[4235]: using nameserver 220.226.100.40#53 Apr 1 23:32:01 dnsmasq[4235]: cleared cache Apr 1 23:32:01 NetworkManager[901]: <warn> Activation (wlan0) failed. Apr 1 23:32:01 NetworkManager[901]: <info> (wlan0): device state change: failed -> disconnected (reason 'none') [120 30 0] Apr 1 23:32:01 NetworkManager[901]: <info> (wlan0): deactivating device (reason 'none') [0] Apr 1 23:32:01 dbus[885]: [system] Activating service name='org.freedesktop.nm_dispatcher' (using servicehelper) Apr 1 23:32:01 dbus[885]: [system] Successfully activated service 'org.freedesktop.nm_dispatcher' Apr 1 23:32:01 NetworkManager[901]: <error> [1333303321.565351] [nm-device-wifi.c:1815] nm_device_wifi_set_mode(): (wlan0): error setting mode 2

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• vpnc Not Adding Internal DNS Servers to resolv.conf

  - by AJ

  I'm trying to setup vpnc on Ubuntu. When I run vpnc, my resolv.conf file does not get changed. It still only contains my ISP's name servers: #@VPNC_GENERATED@ -- this file is generated by vpnc # and will be overwritten by vpnc # as long as the above mark is intact nameserver 65.32.5.111 nameserver 65.32.5.112 Here is my /etc/network/interfaces: auto lo iface lo inet loopback auto eth0 iface eth0 inet static address 192.168.1.3 netmask 255.255.255.0 gateway 192.168.1.1 dns-nameservers 65.32.5.111 65.32.5.112 Any tips on how to troubleshoot/resolve this? Thanks in advance.

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• using RHEL5 as a router

  - by gopikrishna7779

  Dear Sir, I am planning to use a RHEL5 installed computer as a internet connection sharing device. I mean I want to share the internet connection through it I have installed 2 Lan cards in it eth0 and eth1 eth0 Internet eth1 LAN eth0 configuration as follows ; Ipaddress : 115.252.64.187 Subnet : 255.255.255.240 Gateway : 115.252.64.177 I wrote the following entries in Vim /etc/resolv.conf nameserver 202.138.96.2 (preferred DNS Server) nameserver 202.138.103.2 (secondary DNS server) :q! then eth1 ipaddress : 192.168.1.1 subnet : 255.255.255.0 gateway : 192.168.1.1 (I am confused which gateway I need to use in the above scenario) I am unable to ping to my lan and I am able to connect to the Internet. Please let me know the sollution for this. Thanks in advance. regards, G.Gopi Krishna

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• "Couldn't resolve host" for any external content

  - by scatteredbomb

  On our site we run a few different scripts for various sites (uploading to amazon s3, data from chartbeat, script to count twitter followers) and all of them just stop working from time to time. They work most days, but then some days (like today) they all just stop working. This simple script to get follower count into PHP $url = "http://twitter.com/users/show/username"; $response = file_get_contents ( $url ); $t_profile = new SimpleXMLElement ( $response ); $count = $t_profile->followers_count; Just sits there for a couple minutes, then finally spits out an error that says "Couldn't resolve host". Any script we use for an external site gives us this error. I'm not really sure where to check what's blocking these connections all of a sudden, and why it seems to work most times, then doesn't for a day or so, then works again. Any tips? Update: Contents of resolv.conf search 147.225.210.rdns.ubiquityservers.com nameserver 72.37.224.5 nameserver 72.37.224.6

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• Insulate hosted client domains from server IP address change?

  - by babtek

  I will be hosting web content for many client domains on a single IP address (with a web hosting company, not inhouse machine). Initially, I must give client some information to configure their registrar to point the domain to my server. I want client domains insulated from a potential IP address change, so if I change hosts/IP address they don't have to reconfigure anything with their registrar. Is this reasonably possible without running my own nameserver? If so, what would be the smartest way to make it happen? Instruct clients to make CNAME record? Use some type of DNS management service that clients would use as a nameserver?

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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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• How do I set up an IP address on a Linux VM running in VM Player so I can access it from my Windows 7 host?

  - by BradyKelly

  I have just installed an Openbravo appliance on my Windows 7 VM Player host. I am now staring at a command prompt that tells me to go to http://localhost to access the ERP system, but I cannot find any browser on the appliance. I am guessing I should rather follow their advice to configure an IP address for the Linux VM and just access that from a Windows browser on my host. How do I go about this? More specifically, How do I choose a local IP address to assign? How do I set things up so that this IP address is visible to my Windows host? Their help says to assign an DNS, to make the server visible to the internet, but internet visibility per se is not needed. How should I interpret or adapt this help for that? Finally to make the IP address available to the Internet, assign some DNS servers to it: $ echo "nameserver IP_DNS1" /etc/resolv.conf $ echo "nameserver IP_DNS2" /etc/resolv.conf

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• No GUI after upgrade to Ubuntu 9.10 (boots to command line)

  - by Gathris

  I have just upgraded to Ubuntu 9.10 (network upgrade using the update manager, from 9.04 which had different graphics related problems) and when I try to boot into it all I get a small Ubuntu logo, flickering text and then the tty1 command line with a logon prompt. startx gives following error: Fatal server error: no screens found I traced down a tutorial that said I needed the latest graphics drivers (Gigabyte ATI Radeon 4650 HD installed with 9.10 catalyst drivers) so I did using the 'sh' command and a USB stick (I have a working Windows partition) and it installed fine but did not fix the problem. Edit: Thanks to UK and Arjan van Bentem below I was able to understand the full error message of start x: Parse error on lone 2 of /etc/X11/xorg.conf 'nameserver' is not a valid keyword in this section Fatal server error: no screens found This has nothing to do with a graphical error (sorry if I misled anyone) but the xorg.conf file has 3 lines in it and lines 2-3 have an entry 'nameserver'. Using the nano command I commented out (using a # before the entries) the nameservers and can now boot Ubuntu. Thanks to everyone for their help.

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• Setting up a static IP address (public) in Ubuntu

  - by ycseattle

  I have a business class internet connection and need to setup a static ip address for a machine. I did a search online and only find how to setup static local ip addresses (like 192.168..). I tried the same technique, and only setup the ip address and netmask, but after restart networking the computer could not connect to the outside world. This is what I did: 1) edit /etc/network/interfaces iface eth0 inet static address 173.10.xxx.xx netmask 255.255.255.252 2) edit /etc/resolv.conf search wp.comcast.net nameserver xx.xx.xx.xxx nameserver xx.xx.xx.xxx 3) restart network sudo /etc/init.d/networking restart Now the last step didn't report error, ifconfig shows the ip address was set, but this server cannot connect to outside world, ping google.com and reports "unknown host google.com". Any ideas?

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• Postfix smtp error 450 (failed to add recipient)

  - by culter

  I have debian server with postfix and roundcube. After an attack we are on 2 blacklists, but I don't think that this is the main problem. I can't send mail to any address. I tried to find the cause...I checked var/spool/postfix/etc/resolv.conf and resolv.etc and they're the same with this content: nameserver 127.0.0.1 nameserver localhost In var/log/mail.err I found: cyrus/imap[25452]: DBERROR: opening /var/lib/cyrus/user/m/[email protected]: cyrusdb error cyrus/imap[25452]: DBERROR: skiplist recovery /var/lib/cyrus/user/m/[email protected]: ADD at 1FC0 exists When I try to send email from roundcube, I get the message from title. When I send it within opera or any other mail client, It gives nothing, but email is'nt sended. Thank you for any advice.

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• dhclient configures /etc/resolv.conf with invalid entry

  - by kubal5003

  I'm trying to figure out why running dhclient on my interface sets /etc/resolv conf to the ip number of my gateway(router). This entry is invalid and each and every time causes inability to resolve any address. I would like to: stop dhclient from overwriting the /etc/resolv.conf or make dhclient write there the valid dns ip from my router More on the environment: I'm using virtual Debian Wheezy as a client system on Windows Seven x64. It is run by Virtualbox with networking mode set to bridged (all packets from debian are injected to my network interface on windows). If I manually configure the /etc/resolv.conf then everything works fine. Doing this on every boot is quite annoying.. PS I know I can write a script to do it for me, but this is not the solution I want. //edit router ip: 192.168.1.100 /etc/resolv.conf AFTER running dhclient eth0: "nameserver 192.168.1.100" what I would like the /etc/resolv.conf to look like: "nameserver 89.202.xxxx" (I don't have to provide the real ip do I? )

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• reaching 99.9999% uptime

  - by user35204

  I am currently developing a project which is mission-critical. The actual domain name is registered with 1 & 1 and I plan on purchasing DynDNS Custom DNS service (which has 5 different geographical locations for DNS) and then another secondary DNS service to make sure my DNS is as failover safe as possible. Does it matter that the registration is with 1 & 1 - are they a weak link in the chain? All I really use them for is to say that DynDNS is my primary DNS nameserver and then my secondary DNS is my other nameserver. I can transfer the registration to DynDNS - Im just not sure if it really matters or not. Thanks

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