Re: [exim] Problem relaying from local subnet

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Autor: Matthew Byng-Maddick
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Dla: exim-users
Temat: Re: [exim] Problem relaying from local subnet
On Fri, Dec 09, 2005 at 09:59:45AM +0000, Philip Hazel wrote:
> On Thu, 8 Dec 2005, Marc Haber wrote:
>> |$ ping 127.1
>> |PING 127.1 (127.0.0.1) 56(84) bytes of data.
> My goodness! I never knew that, and it seems to work on at least Linux, 
> FreeBSD and Solaris. Experiments show that
> 127.1    ->  127.0.0.1
> 127.1.1  ->  127.1.0.1
> Is this documented anywhere?


It dates back from the very early days. It's not generally very nice in
IPv4, and people who use 192.168.0/24 are fine, but people who use, say
192.168.2/24 might get somewhat confused. (expands to 192.168.0.2/24,
which is, of course, 192.168.0.0/24).

My personal feeling is not to allow it, as it can confuse, and produce
hard-to-spot bugs if you mistype something.

But that's me.

Cheers

MBM

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Matthew Byng-Maddick          <mbm@???>           http://colondot.net/
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