[Pdns-users] [E] Re: ALIAS not resolving to IP address

[Brian Candler]

On 31/03/2021 20:12, Chhavi Mittal wrote:
> This is what I get in tcpdump: I see a call to 53 for securityservices 
> and then a call to 8699 for mydomain.com <http://mydomain.com> and 
> then 2 more pair of calls for the same but end result is a timeout.
>
> 12:09:18.666913 IP (tos 0x0, ttl 64, id 5331, offset 0, flags [none], 
> proto UDP (17), length 81)
>     127.0.0.1.36427 > 127.0.0.1.53: 32855+ [1au] A? 
> securityservices.com <http://securityservices.com>. (53)
> 0x0000:  4500 0051 14d3 0000 4011 67c7 7f00 0001  E..Q.... at .g.....
> 0x0010:  7f00 0001 8e4b 0035 003d fe50 8057 0120  .....K.5.=.P.W..
> 0x0020:  0001 0000 0000 0001 1476 6572 6173 6563  .........sec
> 0x0030:  7572 6974 7973 6572 7669 6365 7303 636f urityservices.co 
> <http://urityservices.co>
> 0x0040:  6d00 0001 0001 0000 2910 0000 0000 0000  m.......).......
> 0x0050:  00                                       .
> 12:09:18.667947 IP (tos 0x0, ttl 64, id 5332, offset 0, flags [DF], 
> proto UDP (17), length 58)
>     127.0.0.1.40512 > 127.0.0.1.8699: UDP, length 30
> 0x0000:  4500 003a 14d4 4000 4011 27dd 7f00 0001  E..:.. at .@.'.....
> 0x0010:  7f00 0001 9e40 21fb 0026 fe39 6eeb 0100  .....@!..&.9n...
> 0x0020:  0001 0000 0000 0000 086d 7964 6f6d 6169  .........mydomai
> 0x0030:  6e03 636f 6d00 0001 0001                 n.com.....

OK, so auth sends the request for mydomain.com to the recursor on 8699, 
but the recursor doesn't forward it to auth on localhost:53, so your dig 
client times out and retries 5 seconds later.

Is your recursor definitely listening on port 8699?  (use "netstat 
-naup" or "ss -naup")



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