Controlling HTTP & SMTP IP flow for 3 NIC's

[Les Mikesell]

Tim Alberts wrote:

>>>
>>> I have told sendmail to listen to the correct interfaces, but that 
>>> apparently doesn't mean only write to those interfaces.  I don't see 
>>> how to control this by setting up my routes and I can only really 
>>> think of ways to block it in IPtables, not re-route it.
>>
>> You probably used the DaemonPortOptions entry in sendmail.mc to 
>> control the listening side.  Do the same with ClientPortOptions for 
>> outbound connections.
>>
> 
> 
> Boy it sure sounded like a solution.  This may guarantee that sendmail 
> sends on the specified IP interfaces.  However I think the underlying 
> linux routing is still the problem because the problem hasn't gone away.
> 

Routing shouldn't affect a source IP.  What does tcpdump say is being 
used?  Linux does do some strange stuff with addresses on the same 
machine though so anything is possible here.

-- 
   Les Mikesell
    lesmikesell at gmail.com