Dispatcher with a naptr address as destination - sr-users

14 Nov 2018

Hello all,
I'm trying to use a naptr address as a dispatcher destination and i'm
facing some issues here.

When i configure a naptr address in dispatcher table, like:

*1:1:sip\:proxy-registrar-ci1.fuze.domain:0:0:'':''*

I see kamailio making a dns query of type A, but since that this name
doesn't have any A record configured in dns, kamailio didn't get any
positive reply from it.

Should't kamailio make dns query by this order?

   1. NAPTR
   2. SRV
   3. A

I noticed also that if the name configured in dispatcher table is resolved
successfully with A record from dns, then kamailio tries to make a query to
NAPTR and then SRV services for the exactly same name used for query
previously done(type A), but only if it gets a positive answer from dns to
the A type query.

I'm using kamailio version 5.1.0 with the following dns parameters
configured:

####### DNS Parameters #########
dns = no
rev_dns = no
dns_try_ipv6 = no
dns_retr_time = 1
dns_retr_no = 1
dns_cache_del_nonexp = no
dns_cache_flags = 1
dns_cache_gc_interval = 120
dns_cache_init = 1
dns_cache_mem = 1000
dns_cache_negative_ttl = 60
dns_try_naptr = yes
use_dns_cache = on
use_dns_failover = on
dns_srv_lb = yes

Is there something wrongly configured here that can make kamailio behaves
like that?

Thank you.
Regards
-- 
Cumprimentos
José Seabra