Using linux as a state firewall (masq as 1:1 whithout address translation)

From: Daniel.Ryde@mimer.se
Date: Thu Oct 19 2000 - 06:06:27 EST

Hi there,

Is it possible to use Linux as a state firewall, like masq but without
address translation?

What I mean is that I want it to work like an ordinar router without
address translation, but block all packets from the outside that has
not been initiated from the inside and also handle the special
cases like FTP that masq does.

Possible? How?

/Dr
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