[BUGS] mail servers and ip aliasing

[Jerahmy Pocott]

On 13/05/2008, at 11:07 PM, jonathan michaels wrote:

>>
>> This should work fine, but you want to be careful of what services
>> listen on which address, since most by default listen on all
>> interfaces..
>
> smtp thats all thats involved in this project.

It's not running anything else? I'm just thinking you may not want ssh  
or ftp or something to be available on both IPs and maybe you only  
want smtp to answer to one address, not both..?


>> Your router/switch needs to associate that interfaces MAC with both
>> addresses,
>
> is this as simple as getting the relevent host(s) rebuilding
> the arp table ? or ???

They should do so automagically, if it doesn't seem to be working you  
could try power cycling your switch, but really all those things  
should update themselves..

> this is only thing that sort of concerns me, also, is if pf
> will get its knickers in a knot (so to speak). dosent seem to
> be raised in teh literature (not in yahoo at anyrate if i
> remember correctly).

I don't use pf, but if you have interface based rules it should match  
any aliased addresses, obviously ip based rules will only match the  
specified ip..

Good luck!