topic Re: DNS Query in Operating System - HP-UX

DNS Query

djoshi — Thu, 19 Aug 2010 15:59:43 GMT

Hi All,

HP-UNIX 11 and 10.01

If we change the name of the DNS server in /etc/resolv.conf, in that case do we need to start any service in order to reflect the changes?

Thx for your help.

Re: DNS Query

Steven Schweda — Thu, 19 Aug 2010 16:57:50 GMT

I believe that the resolver reads the file
every time, so there's nothing to restart
there.

> [...] any service [...]

_Some_ service could cache something, but,
knowing nothing about _your_ services, I
wouldn't expect any trouble.

When in doubt, I say, "Run the experiment."
(And be ready to re-boot.)

Re: DNS Query

S. Ney — Thu, 19 Aug 2010 18:24:20 GMT

I've added a nameserver IP address in my /etc/resolv.conf files w/o reboot as well as remove an old IP. I also have the fully qualified name of the dns server in my /etc/hosts.

Do you have any applications running that are dependent on a specific dns server? Also what about your nsswitch.conf? I'd consider those factors but I haven't had problems when pointing to a new DNS server w/in my org.

Re: DNS Query

harry d brown jr — Thu, 19 Aug 2010 18:32:52 GMT

have a look at this thread: http://forums13.itrc.hp.com/service/forums/questionanswer.do?threadId=204816

Re: DNS Query

harry d brown jr — Thu, 19 Aug 2010 18:40:33 GMT

Sorry wrong link, try this instead, where I discuss DNS Caching:

http://forums11.itrc.hp.com/service/forums/questionanswer.do?threadId=840826&admit=109447626+1282246710538+28353475

good luck,
harry

Re: DNS Query

rick jones — Fri, 20 Aug 2010 00:01:27 GMT

I don't recall HP-UX 11.0 or 10.01 (quite old bits - even when released, HP wanted people off of 10.01 pretty quickly...) checking /etc/resolv.conf after the first name query, so my inclination would be to restart any service you would like to see the change.

Re: DNS Query

djoshi — Fri, 20 Aug 2010 12:52:19 GMT

Thx to all who answer my query.