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Date:      Fri, 26 Aug 2022 16:26:26 +0700
From:      Eugene Grosbein <eugen@grosbein.net>
To:        Wojciech Puchar <wojtek@puchar.net>
Cc:        freebsd-hackers@freebsd.org
Subject:   Re: ipfw nat problem
Message-ID:  <57a9cad0-c2ef-6e1f-2185-0f7563fe3758@grosbein.net>
In-Reply-To: <c3ce6ec-60c7-f9b7-9c73-1fdcdfee505@puchar.net>
References:  <d36e56ff-c7cd-1634-dbc-f76bdb46503c@puchar.net> <623ac39e-2915-463a-9e4c-9f99bae28c69@puchar.net> <bfa7d65a-95d6-1605-8fb0-cf397b79d549@grosbein.net> <c3ce6ec-60c7-f9b7-9c73-1fdcdfee505@puchar.net>

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26.08.2022 15:04, Wojciech Puchar wrote:

>>> found a reason. forwarding was set to 0 in sysctl
>>
>> Never set net.inet.ip.forwarding=1 manually or via /etc/sysctl.conf.
>>
>> Always use gateway_enable="YES" in /etc/rc.conf, or else system scripts started with devd
> 
> I don't use devd on servers.
> 
>> on any interface creation (tunX, ngX, etc.) will switch forwarding to 0 again.
> 
> Well - i do create tun or other interfaces without problems. Can you point an example of this?

Some scripts (f.e. from /etc/devd.conf) invoke /etc/pccard_ether $subsystem start
(the name "pccard_ether" is just historic, it serves any cloned network interface).

It runs "/etc/rc.d/netif quietstart" $ifn that runs "/etc/rc.d/routing static any $_if"
that may reset net.inet.ip.forwarding=0 unless you have gateway_enable="YES" in /etc/rc.conf
despite you could have set net.inet.ip.forwarding=1 via sysctl.conf.





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