Conditional Access to Network Resources

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Hi List,

I'm facing the following problem:

I want to allow my domain to access certain ports on the local interface
and certain ports on a nonlocal interface. 
Example:
Domain may connect to port 25 over eth0
Domain may connect to port 4242 only on the loopback interface.

But if I allow my domain to access port 25 over eth0 it can also 
access port 25 on the local interface because I have to allow full
access to both, local and remote nodes and sending traffic over
both network interfaces.

I think I need to have some kind of condition, or do I missunderstand 
something here?

Constraint: Switching to SECMARKing instead of the "old" network 
confinement code is not an option at the moment. :(

Regards,
Chris

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