DNS Not Resolving Domain Name

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

 

Below is the content of /etc/resolv

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

 

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?

 

Yes. Please make sure they are running. What's the output of

Code:

netstat -tap

?

 

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.

 

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.

 

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?

 

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?