[sr-dev] [kamailio/kamailio] DNS destination resolution failure when too many SRV records (#2651)

jklingenmeyer notifications at github.com
Mon Mar 1 16:08:16 CET 2021


Thanks for your appreciated replies!

I do not think this is a firewall issue because when using `dig` command I get no issues. Tried with two different sets of options:
* `dig +bufsize=512` : got `Truncated, retrying in TCP mode` then a correct reply received through TCP
* or simple `dig` : in that case I directly get the answer through UDP
 
But of course it does not work when disallowing TCP retry mode and setting a 512 bytes buffer size
(`dig +bufsize=512 +ignore`)

Tests show clearly now a limit based on packet size (512 bytes) but I still do not know where it comes from precisely.
Will investigate deeper when I will have some time.

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