Hello,

I think the A query you see is done by the part related to doing OPTIONS keepalive -- I haven't developed that part, but if I remember correctly I saw something like that in the code. Maybe you can disable keepalive via the mod param and see if the query is still done.

For routing, dispatcher is not doing any DNS query, just sets the R-URI or D-URI and then tm is in charge of resolving the destination address, and there should be from NAPTR down, if no transport or port is specified.

Cheers,
Daniel

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

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