Thank you for the reply.
Here it is, not sure what that means.
The recursor is running on the same server as the PDNS with a different
IP address. if that makes a difference.
root@ns1:~# rec_control trace-regex s-s.mx
ok
ok
ok
On 5/1/2020 11:37 AM, Aki Tuomi wrote:
On 05/01/2020 6:31 PM Sergio P Cesar via Pdns-users
<pdns-users@mailman.powerdns.com> wrote:
I am new with pdns, just installed a resolver 4.3.0-rc2 to learn and all
seems to work but stumbled into an issue I cant resolve.
My mailserver failed to deliver email to a few domains, in tracking it I
found that their DNS will drop the first packet on every new query but
will respond on a second query ok and every one after that. (5 minutes
timeout) it will drop the 1st packet again.
I was expecting the recursor to query the 2nd and 3rd server in their
list but it does not look like it is doing that.
It seems like it is caching the failure and does not query again at all
for a while.
I changed packetcache-servfail-ttl=0 and now it looks like after the 3rd
query attempt it will work as the far end server now respond.
Not sure this is correct setting or I will have adverse effect setting
this to 0.
Perhaps I have not set something else that will tell the recursor to try
the next server if the first one fail to respond or send a second packet
or a retry.
I used bind to test and it gets a response on the first try. I did not
try to trace the packets from a bind query.
Thanks
Try `rec_control trace-regex domain.com` and post that. Without censoring the
results.
Aki
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