To clarify the question:
Is it possible or is there a program or kernel patch that will allow
forwarding and masquerading of packets so that the following scenario will
work:
Host A has own permanent IP address some on the internet not in the same
domain or subnet as host B.
Host B is the linux masquerading/forwarding server. It has a single IP
address visable to the internet and is connected via ethernet interface. It
has a second ethernet interface connected to a class C private IP network
(e.g. 192.168.XXX.XXX) for which it is acting as a masquerading gateway.
Host C is a single specific computer in the private IP network needing to
send and receive TCP and UDP and ICMP traffic to/from host A.
Because many ports are involved in the communication between A and C it is
impractical and dangerous (i think) to use ipautofw to forward all traffic
on (almost all) ports on B to host C.
Is it possible to get the linux masq. server (host B) to analyze each
incoming packet and rewrite all packets that come from host A so that they
are delivered to host C in such a way that host C thinks that they are
normal packets intended for host C that came from host A?
Thanks.
-Rob Ellis
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