Firewall/port forwarder advice

[Scott]

Hi,

I'm happy with the firewall built into my router, except for one thing: it
only allows me to port forward to an IP address only, rather than IP address
and internal port #.

An example may make it clearer:

Say I have external IP@ 123.123.123.123, and internal IP@'s 192.168.0.2-4,
and a web server running on port 80 on all three machines.

What my router allows:

Connection to 123.123.123.123:80 is routed to 192.168.0.2:80
Connection to 123.123.123.123:81 is routed to 192.168.0.3:81
Connection to 123.123.123.123:82 is routed to 192.168.0.4:82

What I want:

Connection to 123.123.123.123:80 is routed to 192.168.0.2:80
Connection to 123.123.123.123:81 is routed to 192.168.0.3:80
Connection to 123.123.123.123:82 is routed to 192.168.0.4:80

I'm running WXP, and looked into the Internet Connection Firewall
functionality available in XP. While I like that I can map an external port
to an internal port, ICF is essentially braindead and useless for what I
need to do.

Is there any FREE firewall or port forwarding software "out there" that will
allow me to further port forward the network connections for the last two
scenarios above, such that:

Connection to 192.168.0.3:81 is forwarded to 192.168.0.3:80
Connection to 192.168.0.4:82 is forwarded to 192.168.0.4:80

Or perhaps it's just a simple network configuration that I don't know about.

Thanks,
Scott

 

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