[dnsdist] how to increase connection qlen on DoH listener?

Christoph cm at appliedprivacy.net
Mon Mar 30 20:49:00 UTC 2020

> please open a feature request [1] if you
> think it's worth it.

thanks for considering this

>> Reading https://www.freebsd.org/doc/en/books/handbook/configtuning-kernel-limits.html
>> I would expect that you want to increase kern.ipc.soacceptqueue
>> 	-Otto
> https://docs.freebsd.org/doc/12.1-RELEASE/usr/local/share/doc/freebsd/en/books/handbook/configtuning-kernel-limits.html
> confirms that that is very likely the proper sysctl for your version,

They are the same setting but as Remi said it is not supported by dnsdist.

from listen(2):
     kern.ipc.somaxconn	sysctl(3) has been replaced with
     kern.ipc.soacceptqueue in FreeBSD 10.0 to prevent confusion about

     its actual functionality.  The original sysctl(3)
kern.ipc.somaxconn is still
     available but hidden from a sysctl(3) -a output so	that existing
     applications and scripts continue	to work.

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