[Wolves] IP Aliasing

[Andy Smith]

Hi Simon,

On Thu, Oct 16, 2008 at 10:47:31AM +0000, Simon C. Burke wrote:
> Hi all.
> 
> I recently moved my mail server to a different box. However whilst changing IP I wanted to add the old one as an IP Alias.
> 
> I went through the usual rigmarole of running:
> 
> /sbin/ifconfig eth0:0 78.105.102.xx netmask 255.255.248.0

These days you should be using the "ip" utility..

Also the netmask for an alias on the same network as another
interface should be 255.255.255.255.  So:

# ip addr add 78.105.102.xx/32 dev eth0

> /sbin/route add -host 78.105.102.xx dev eth0:0

This bit is unnecessary as there is already an IP on that network.

That said I don't think either of these are your problem.

So you've configured your MTA to listen on 78.105.102.xx:25 as well?
What does lsof -p <pid> of it say?

What happens when you

$ telnet 78.105.102.xx 25

??

Cheers,
Andy

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