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Subject: Re: Avoid using RFC3927 outside of the link
To: Alarig Le Lay <alarig@swordarmor.fr>
References: <20161219184617.7yph7isgtgjy4mja@kaiminus>
 <58582C25.7090806@grosbein.net> <20161219190506.kc32q7sz3okekup7@kaiminus>
 <58583645.3090502@grosbein.net> <20161219210150.mf4cwx3k33x2qbbe@kaiminus>
Cc: freebsd-net@freebsd.org
From: Eugene Grosbein <eugen@grosbein.net>
Message-ID: <58589E28.9020900@grosbein.net>
Date: Tue, 20 Dec 2016 09:57:44 +0700
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20.12.2016 4:01, Alarig Le Lay пишет:
> On Tue Dec 20 02:34:29 2016, Eugene Grosbein wrote:
>> Well, you can always use brute force instead:
>>
>> ipfw nat 169 config reset ip 89.234.186.1 && \
>> ipfw add 60 nat 169 ip from 169.254.0.0/16 to any out xmit igb0
>>
>> That's ugly but works.
>
> I will work just by side effect: by doing this, I will send BGP packets
> from 89.234.186.1, which is an IP than the peer learned by BGP. This will
> create a recursive loop, and the session will be shut. So, no more
> traffic will transit through this interface, and this IP will not be
> displayed anymore :p

You could also use another public IP as primary address for interface in question
and an address from 169.254.0.0/16 as secondary one. BGP will still work and
kernel/ICMP will use public IP.