Re: [exim] Warning to Linux postmasters

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著者: Dave Evans
日付:  
To: exim-users
題目: Re: [exim] Warning to Linux postmasters
On Fri, Aug 03, 2007 at 06:59:45PM +0100, Tony Finch wrote:
> Make sure you have the line
>     mdns off
> in /etc/host.conf on your incoming SMTP servers.

>
> One of my colleagues in our network engineering team discovered today that
> ppswitch was spewing multicast packets, much to our surprise. It turns out
> that recent versions of glibc have quietly added support for multicast DNS
> to the resolver.


I checked my system and found it wasn't doing that (yes, I knew you'd be
pleased). So I downloaded http://ftp.gnu.org/gnu/glibc/glibc-2.6.1.tar.bz2
and checked the change logs, and didn't find any reference to the change. In
fact I didn't find any reference to mdns at all in glibc-2.6.1, nor in my
host.conf(5) man page.

Are you sure it's glibc doing it? Could you point me towards what makes you
think it's glibc? Of course maybe I just missed something /really/ obvious :-)

Thanks,

--
Dave Evans
Power Internet Limited, registered in England #03053650 at Norfolk House,
82 Saxon Gate West, Central Milton Keynes, Buckinghamshire, MK9 2DL.
For more information, see http://www.powernet.co.uk/~davide/about-powernet