Date: Thu, 4 Jun 2009 15:34:48 -0700 From: Gregory Shapiro <gshapiro@freebsd.org> To: "Bjoern A. Zeeb" <bzeeb-lists@lists.zabbadoz.net> Cc: freebsd-hackers@freebsd.org Subject: Re: Jails, loopback interfaces and sendmail Message-ID: <20090604223448.GD465@rugsucker.smi.sendmail.com> In-Reply-To: <20090604220734.H12292@maildrop.int.zabbadoz.net> References: <4A27D38B.6040108@erdgeist.org> <20090604203905.B12292@maildrop.int.zabbadoz.net> <20090604212123.GK59532@rugsucker.smi.sendmail.com> <20090604220734.H12292@maildrop.int.zabbadoz.net>
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>> 8.12.7/8.12.7 2002/12/29
> yes, that's not from stone age:(
Well, the way things move, it almost is. :)
> Have you ever thought about having those files changed just for
> FreeBSD? Or had there been porblems on FreeBSD systems with localhost
> as well?
Now that you mention it, we are already using separate FreeBSD files in
src/etc/sendmail/freebsd{,.submit}.mc so I can do something different
for FreeBSD. I think we are still in code slush and not freeze for 8.0.
I'll double check and if so, make the change tonight (with a note in
UPDATING). As I recall, nobody reported a problem resolving localhost
under FreeBSD.
> Has it been a special time with localhost and IPv6 that caused
> problems as 2002 has been rather late in terms of sendmail and
> resolver etc. What had started to cause those problems?
Sadly, that didn't stick in my memory. The MTA handles IPv4 fallback
on a failed IPv6 connection if an IPv4 address is available so I don't
think IPv6 enters into it. If I recall correctly, it was simply a
matter of localhost returning h_errno == HOST_NOT_FOUND or the resolver
returning NXDOMAIN. I'll check with Claus to see if he remembers.
Another scenario that I still see today (as owner of localhost.org)
is sites that have a bogus 'domain' or 'search' such that the
lookup for 'localhost' returns information about 'localhost.com' or
'localhost.org'. I've tried to improve that situation by mapping
localhost.org's A record to 127.0.0.1. Unfortunately, the owners of
localhost.com and localhost.net (as well as possibly everything other
TLD) have not done the same.
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