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Date:      Thu, 15 Mar 2001 15:11:48 -0700 (MST)
From:      Nate Williams <nate@yogotech.com>
To:        Dag-Erling Smorgrav <des@ofug.org>
Cc:        nate@yogotech.com (Nate Williams), Adam Laurie <adam@algroup.co.uk>, Ronan Lucio <ronan@melim.com.br>, security@FreeBSD.ORG
Subject:   Re: Port 113
Message-ID:  <15025.15908.270320.373266@nomad.yogotech.com>
In-Reply-To: <xzpbsr2ptv7.fsf@flood.ping.uio.no>
References:  <006b01c0ad38$39eed0a0$1401a8c0@tedm.placo.com> <099801c0ad7c$75b63800$2aa8a8c0@melim.com.br> <15025.5630.472269.543769@nomad.yogotech.com> <3AB1261F.23B8BE75@algroup.co.uk> <15025.10176.676792.32675@nomad.yogotech.com> <xzpbsr2ptv7.fsf@flood.ping.uio.no>

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> > My local sendmail doesn't use *my* ident server, but remote sendmail
> > servers use *my* ident server, so using ident locally speeds up mail
> > transfers *to* my host.
> 
> No, the problem only arises if you drop TCP 113 SYNs to the floor
> instead of rejecting them (ipfw deny instead of ipfw reset); the
> server times out waiting for you to reply. If you send an RST or an
> ICMP UNREACH back, it'll give up immediately.

Hmm, I remember a long time ago where it was said (urban legend) that
even sending RST's confused older version of mail servers.

Running the 'fake' ident server hasn't caused any problems AFAIK. :) :)




Nate

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