Re: question about return code .255

[Matus UHLAR - fantomas <uhlar@xxxxxxxxxxx>]

On 24.01.25 18:13, Dimitris T. wrote:
> using dnswl in postscreen configuration, with local non-forwarding 
> bind resolver :
>
>         list.dnswl.org=127.[0..255].[0..255].0*-2
>         list.dnswl.org=127.[0..255].[0..255].1*-3
>         list.dnswl.org=127.[0..255].[0..255].[2..254]*-4
>
> but getting a lot of 127.0.0.255 return codes from dnswl queries...  
> according to https://www.dnswl.org/?page_id=15#returncodes , this is a 
> special return code in case of >100k (per 24h) issued requests..
>
> struggling with this , because all (4) MXs combined, roughly receive 
> ~2k emails per 24h.
>
> looking at latest mail + queries logs from our resolver, and this 
> number is never surpassed. example from "busiest" MX :
>
> ➜  ~ cat /var/log/mail.log.1 |  grep dnswl | wc -l
> 827
>
> ➜  ~ cat /var/log/mail.log.1 |  grep dnswl | grep 127.0.0.255 | wc -l
> 767
>
> ➜  ~ cat /var/log/named/queries.log.1 | grep dnswl | wc -l
> 1929
>
> so, could there be another reason for this?

what DNS servers do you use?


--
Matus UHLAR - fantomas, uhlar@xxxxxxxxxxx ; http://www.fantomas.sk/
Warning: I wish NOT to receive e-mail advertising to this address.
Varovanie: na tuto adresu chcem NEDOSTAVAT akukolvek reklamnu postu.
Silvester Stallone: Father of the RISC concept.