[OpenSIPS-Users] How can I prevent Opensips to cache DNS queries.

Mundkowsky, Robert rmundkowsky at ets.org
Wed May 10 09:13:26 EDT 2017

What do you mean you "disabled the resolver"?

I haven't play with this in a long time, but I think the /etc/nsswitch.conf file defines if you use /etc/hosts file or/and DNS for looking up host names, and might allow nis+ as well, but I can't remember.

So might want to check if you happen to have your hostname defined in the hosts file.  Also seems people note that /etc/resolv.conf might be overwrite at boot based on using NetworkManager.  So maybe your settings are being over written.


From: Users [mailto:users-bounces at lists.opensips.org] On Behalf Of Stefan Carlsson
Sent: Tuesday, May 9, 2017 5:36 AM
To: Users at lists.opensips.org
Subject: [OpenSIPS-Users] How can I prevent Opensips to cache DNS queries.

Hi !

It seems that the Opensip 2.2 caches DNS queries !!!

Even after I disabled the resolver in Centos, the OpenSIPs seems to "remember" old queries. (eg. IP's)
after a Opensip restart, the old stuff was gone.

If so, how can I disable the DNS caching in the Opensips, I want the system to always make a new , fresh

Kind Regards / Vänligen ...

Stefan Carlsson


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