Results 1 to 10 of 10

Thread: nslookup error

  1. #1
    Join Date
    Jan 2002
    Location
    KUL, Malaysia
    Posts
    33

    nslookup error

    Trying to troubleshoot an issue with my VPS [XEN - CentOS release 6.4 (Final) - virpus.com] and name lookups there are painfully slow.
    Code:
    $ nslookup
    > server 8.8.8.8
    Default server: 8.8.8.8
    Address: 8.8.8.8#53
    > aaa.com
    ;; connection timed out; trying next origin
    ;; connection timed out; no servers could be reached
    > bbb.com
    ;; connection timed out; trying next origin
    ;; connection timed out; no servers could be reached
    > ccc.com
    ;; connection timed out; trying next origin
    ;; connection timed
    What could be the cause?
    Last edited by JdS; 10-21-2013 at 01:51 AM.
    J de Silva
    GIDBlog.com

  2. #2
    Can you ping 8.8.8.8 (google DNS)? if not ask your VPS provider to check this and also check the route by traceroute and check where your packets are reaching or not.

  3. #3
    Join Date
    Apr 2005
    Posts
    1,767
    I would ask Virpus if they have a local resolver setup already, so you can use those. If not, then try using this inside of /etc/resolv.conf

    nameserver 4.2.2.2
    nameserver 4.2.2.3

  4. #4
    Join Date
    Jan 2002
    Location
    KUL, Malaysia
    Posts
    33
    As per your request:

    Code:
    $ sudo service iptables stop
    iptables: Flushing firewall rules:                         [  OK  ]
    iptables: Setting chains to policy ACCEPT: filter mangle na[  OK  ]
    iptables: Unloading modules:
    
    ...
    $ ping -c10 8.8.8.8
    PING 8.8.8.8 (8.8.8.8) 56(84) bytes of data.
    64 bytes from 8.8.8.8: icmp_seq=2 ttl=50 time=26.7 ms
    
    --- 8.8.8.8 ping statistics ---
    10 packets transmitted, 1 received, 90% packet loss, time 10000ms
    rtt min/avg/max/mdev = 26.745/26.745/26.745/0.000 ms
    
    ...
    $ traceroute 8.8.8.8
    traceroute to 8.8.8.8 (8.8.8.8), 30 hops max, 60 byte packets
     1  * * *
     2  * * 67.215.227.37.static.dnsslave.com.com (67.215.227.37)  2.216 ms
     3  * * *
     4  * * *
     5  * * *
     6  * * *
     7  * * *
     8  * * *
     9  * * *
    10  * * *
    11  * * *
    12  * * *
    13  * * *
    14  google-public-dns-a.google.com (8.8.8.8)  26.650 ms * *
    And as for my VPS provider, it seems that their technical support is not working on the weekends or something. In the span of the last 24 hours I have written 4 emails to them but no reply yet from them.
    J de Silva
    GIDBlog.com

  5. #5
    Join Date
    Mar 2003
    Location
    /root
    Posts
    23,990
    Seems like an issue with their router or main node.

    Better wait for their reply to check this for you.

    Specially 4 U
    Reseller Hosting: Boost Your Websites | Fully Managed KVM VPS: 3.20 - 5.00 Ghz, Pure Dedicated Power
    JoneSolutions.Com is on the net 24/7 providing stable and reliable web hosting solutions, server management and services since 2001
    Debian|Ubuntu|cPanel|DirectAdmin|Enhance|Webuzo|Acronis|Estela|BitNinja|Nginx

  6. #6
    Join Date
    May 2013
    Location
    USA
    Posts
    931
    Quote Originally Posted by JdS View Post
    As per your request:

    Code:
    $ sudo service iptables stop
    iptables: Flushing firewall rules:                         [  OK  ]
    iptables: Setting chains to policy ACCEPT: filter mangle na[  OK  ]
    iptables: Unloading modules:
    
    ...
    $ ping -c10 8.8.8.8
    PING 8.8.8.8 (8.8.8.8) 56(84) bytes of data.
    64 bytes from 8.8.8.8: icmp_seq=2 ttl=50 time=26.7 ms
    
    --- 8.8.8.8 ping statistics ---
    10 packets transmitted, 1 received, 90% packet loss, time 10000ms
    rtt min/avg/max/mdev = 26.745/26.745/26.745/0.000 ms
    
    ...
    $ traceroute 8.8.8.8
    traceroute to 8.8.8.8 (8.8.8.8), 30 hops max, 60 byte packets
     1  * * *
     2  * * 67.215.227.37.static.dnsslave.com.com (67.215.227.37)  2.216 ms
     3  * * *
     4  * * *
     5  * * *
     6  * * *
     7  * * *
     8  * * *
     9  * * *
    10  * * *
    11  * * *
    12  * * *
    13  * * *
    14  google-public-dns-a.google.com (8.8.8.8)  26.650 ms * *
    And as for my VPS provider, it seems that their technical support is not working on the weekends or something. In the span of the last 24 hours I have written 4 emails to them but no reply yet from them.

    That's interesting... the first ping went through but the rest failed?
    ▄▀▄ Brian Harrison, Lead Engineer - Reprise Hosting (AS62838)
    ▄▀▄ Deals on cheap dedicated server hosting. IPMI included! Unmetered bandwidth.
    ▄▀▄ Website migration, 24/7/365 support, basic server setup, 15 day money back.
    ▄▀▄ Looking for DEALS on self-managed cheap VPS hosting? Visit VPSHostingDEAL.com

  7. #7
    Join Date
    Nov 2000
    Location
    localhost
    Posts
    3,771
    Could it be your provider is filtering UDP, I believe nslookup will fall back to TCP lookup if UDP times out.
    MattF - Since the start..

  8. #8
    Join Date
    Jan 2002
    Location
    KUL, Malaysia
    Posts
    33
    This was an issue with the node the server is on, according to my service provider.

    They did not apologise for the lack of technical support over the weekend nor offer any explanation why they ignored my reports until Monday.

    Thank you for all your comments and support. If nothing else, the discussion reassured me that it was beyond my control.

  9. #9
    Join Date
    Jul 2008
    Location
    Seminole, Oklahoma
    Posts
    1,665
    Sounds like they may have had a firewall issue on the node blocking ports 53 would be my first though.

    But did they even give you an explanation?
    Can they give you a reason why they couldn't give technical support over the weekend? If they won't give you the time or effort for weekend technical support highly recommend you to find a new host.

  10. #10
    Join Date
    Mar 2005
    Location
    Ten1/0/2
    Posts
    2,529
    Their lack of support over the weekend should be a warning for you - especially if you need assistance over the weekend!
    CPanel Shared and Reseller Hosting, OpenVZ VPS Hosting. West Coast (LA) Servers and Nodes
    Running Linux since 1.0.8 Kernel!
    Providing Internet Services since 1995 and Hosting Since 2004

Similar Threads

  1. nslookup error
    By elvis1 in forum Hosting Security and Technology
    Replies: 16
    Last Post: 04-12-2010, 11:59 PM
  2. Nslookup showing - Need some help
    By Charles_cz in forum Hosting Security and Technology
    Replies: 2
    Last Post: 05-02-2006, 09:12 AM
  3. Nslookup error ,Don't understand .
    By InterKey IL in forum Domain Names
    Replies: 2
    Last Post: 02-17-2004, 08:51 PM
  4. nslookup errors
    By netserve in forum Hosting Security and Technology
    Replies: 2
    Last Post: 12-05-2001, 06:03 PM
  5. nslookup
    By raylin in forum Dedicated Server
    Replies: 5
    Last Post: 02-14-2001, 11:38 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •