Transparent proxy using IPFW

[kalpin at muliahost.com]

Dear All,

Is it possible to do like my requirement below?

1. Setup portfwd in my server listen on port 555 and forward all
connection through this port to another server with same port or different
port
2. All client which connected through this port, then remote server which
landed to the end can see the client's IP.

example:

Client IP: 202.15.15.16
FreeBSD IP: 202.16.17.18 listen on port 555
Remote Server IP: 202.89.89.90

Client IP connect to 202.16.17.18 on port 555, and then FreeBSD forward it
to 202.89.89.90 with same port or different port. Server with IP
202.89.89.90 can see Client's IP 202.15.15.16.

I am using FreeBSD 7.2-stable.

Thank you

Kalpin Erlangga Silaen