DNS Not Resolving Domain Name

Discussion in 'Installation/Configuration' started by asyadiqin, Nov 1, 2006.

  1. asyadiqin

    asyadiqin New Member

    Hi all,

    I have a freshly installed ISPConfig (installed using the howto for Fedora Core 5) and everything seems to be working fine.

    Recently, I installed a site andon this site there is an email form that sends out email enquiries to my clients email accounts. Past week or so, I have been receiving complaints that some of my clients were not receiving anymore enquiries and they tested the form on the site and didn't receive the emails at all.

    I've checked the maillog and found the following (domain have been changed) :

    I did nslookup and dig on the domain to find out more

    Any other queries on other domains gets a response as normal but not this and a few other domains.

    Initially I assumed that it was a wrongly configured domain and nothing to do with my server's DNS. However, when I used an online nslookup site, there seem to be no problem. Even doing a lookup on my local Windows machine gives me a response.

    Any idea what is going on with this?

    Thanks.


    I have not done anything apart than what
     
  2. till

    till Super Moderator Howtoforge Staff HowtoForge Supporter ISPConfig Developer

    Please post the content of the file:

    /etc/resolv.conf
     
  3. asyadiqin

    asyadiqin New Member

    Below is the content of /etc/resolv

    The server is on 142 while 145 is another server running DNS and MySQL.
     
  4. till

    till Super Moderator Howtoforge Staff HowtoForge Supporter ISPConfig Developer

    Please try to set one of your nameservers to a external server e.g. from your cable or server housing provider.
     
  5. asyadiqin

    asyadiqin New Member

    This is what I get from the existing /etc/resolv.conf

    Next, I changed the /etc/resolv.conf to use external nameservers and this is the result

    Does this prove that something is wrong with my DNS servers? How can I rectify this?
     
  6. falko

    falko Super Moderator Howtoforge Staff Moderator HowtoForge Supporter ISPConfig Developer

    Yes. Please make sure they are running. What's the output of
    Code:
    netstat -tap
    ?
     
  7. asyadiqin

    asyadiqin New Member

    The list is too long to list here. :( Can you tell me what I should be looking for?

    Assuming that named/BIND is not in the list, what should I do next?

    Thanks.
     
  8. asyadiqin

    asyadiqin New Member

    I did this in shell. Does this mean that its running?

    Sorry if I am posting unnecessary info but I really do not know anything about BIND.
     
  9. till

    till Super Moderator Howtoforge Staff HowtoForge Supporter ISPConfig Developer

    Yes, this looks better.
     
  10. asyadiqin

    asyadiqin New Member

    So assuming that named/BIND is running fine, why am I having problem doing a lookup on some of the domain, eg. highfoldbedandbreakfast.co.uk

    Problem occurs to a few domains while other domain lookup are fine. If I were to use external nameservers, lookup on the domains would go through without any problems.

    Any ideas what I can do?:D
     
  11. falko

    falko Super Moderator Howtoforge Staff Moderator HowtoForge Supporter ISPConfig Developer

    What's the output of
    Code:
    netstat -tap|grep -i domain
    ?
    Do you see any error messages when you try to restart BIND? Any errors in your logs?
     

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