topic DNS Issues...need help in Operating System - Tru64 Unix

DNS Issues...need help

Sally Devine — Wed, 07 Apr 2004 12:24:13 GMT

Hi All,
My problem is that suddenly we could not longer resolve any names from the DNS. We could not even query the DNS using nslookup. This pointed to a DNS problem, however another server on the same network could. Only difference is one server is v.5.1b (not working) and the other working server is v.5.1. Another curious thing is that when we use nslookup -v the name is resolved. So basically I am trying to find out the difference between nslookup and nslookup -v. There is no -v in the man pages and I just tried it thinking it would mean "verbose" however it seems to force a query with positive results. We removed the dns option from the nsswitch.conf and that fixed our telnet problem. We cannot just keep adding everything to the host files and we need to get a proper resolution, so if anyone has any ideas...please share.

Thanks,
SD

Re: DNS Issues...need help

Ralf Puchner — Mon, 12 Apr 2004 04:25:23 GMT

have you checked the /etc/svc.conf file pointing to the correct resolution method? (configuration with svcsetup utility).

If you have seen the resolution order check the single subsystems for proper work.

Re: DNS Issues...need help

Sally Devine — Tue, 13 Apr 2004 06:33:25 GMT

Yes I did check the svc.conf and it is the same as it was before. Nothing changed.
Thanks,

Re: DNS Issues...need help

Sally Devine — Tue, 13 Apr 2004 10:42:16 GMT

Ok. I found out that the (-v) means to force it to use TCP rather than the default of UDP. So we seem to be having a problem with UDP. So naturally I assume the router, however other systems on that network are fine and work. The only difference with this machine is that it is Tru64 v. 5.1b and the others are just v 5.1.

Re: DNS Issues...need help

Sally Devine — Tue, 13 Apr 2004 13:52:40 GMT

Another thing we have just discovered is that the system is hitting port 0 on the DNS when it does a query. Apparently, this could be a bug.

Re: DNS Issues...need help

Mobeen_1 — Tue, 13 Apr 2004 14:08:26 GMT

Sally,
Sounds like a bug and you may have to review the patches available that address this issue

rgds
Mobeen

Re: DNS Issues...need help

Sally Devine — Thu, 15 Apr 2004 08:38:56 GMT

Well we shut down the oracle database and everything was fine. When we brought the database back up, it was still fine. So there was a problem with the database somehow and memory I assume.

Thanks everyone for the responses.