If not, that would mitigate the volume of DNS
requests sent.
Regards,
Igor.
Hello,
I don't think there is a way to disable dns for outgoing
uri resolving, if you want disabling all dns.
The dns timeout is can be configured at the operating
system level.
To avoid the sip worker blocking, you can try:
a) look at $nh(d) and if it is not an IP, then you can use
async_route() (async_task_route() would be better, but now
only in devel) or mqueue+rtimer to pass the relaying of
the request to another worker process
b) and an intermediary proxy, so you send the requests
with FQDN to it and it will return back to the proxy. You
can send the dst-uri via some custom headers. This would
be like:
[ua1] <===> [kamailio main] <===> [kamailio
dns] <===> [kamailio main] <===> [ua2]
kamailio dns should not do record routing, because
requests within dialog should have IP addresses.
Cheers,
Daniel
On 29/07/14 14:31, Igor Potjevlesch wrote:
Hello,
I’m using
Kamailio 4.1 and I’m wondering how to avoid external DNS
resolution.
I have the
following config:
dns_cache_init=no
use_dns_cache=no
dns=no
rev_dns=no
Even with
this config, I have many and many DNS query on SRV _sip
for the hostnames set in carrierroute module.
These
requests are not useful because the A resolution is done
by /etc/hosts.
Major
problem with this, is that when I have a DNS issue or IP
transit issue, Kamailio waits for resolution timeout and
becomes overloaded. As a consequence, Kamailio can’t
treat others SIP requests like REGISTER because he stuck
in DNS resolution.
Regards,
Igor.
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