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 :: Mailing Lists

[ILUG] IP aliases in different subnets

[ILUG] IP aliases in different subnets

Dave Wilson dave.wilson at heanet.ie
Fri Jan 21 13:29:03 GMT 2000


> However.. maybe you're asking the wrong question. What exactly do you want
> to do?

Could be :) Here's an example (applications may change):

* I want sendmail to bind to address 1.2.3.4, so that outgoing connections
  have a source of 1.2.3.4.

* I want named to bind to address 5.6.7.8, so that outgoing connections
  have a source of 5.6.7.8.

The potential problem i might be inventing is that if the machine has
a default gateway on the same subnet as 1.2.3.4, will packets with
a source address 5.6.7.8 - effectively a different LAN - ever reach that
default gateway? Is it sufficient that the linux box knows that there
is *one* way out, even if it's on a different subnet?

Cheers,
Dave

-- 
 dave.wilson at heanet.ie --------------------------------------- +353-1-662-3412
 It is one thing to pray; it is another to pray to entities who might not only
 be listening, but who will search you out on the road and beat you across the
 head with sticks if you say something that offends them.       -- Neil Gaiman
 ------------------ For crypto key send a blank message to davew+pgp at heanet.ie




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