Forward a connection to a dc server.

Helo,
I'm using dc server which is accepting a connection from a hosts in it's
lan. My host which i'm connecting from is linux box (lucyfer).I want to
connect to this server when I'm outside this lan using some routing or
iptables issues. DC server accept connections to dc.server:2222.
How can I configure my IP tables (or some proxy server maybe) on lucyfer
so that when i'm connectin to lucyfer from outside the lan the dc.server
would think the connection it's made from lucyfer not a machine outside
a lan.
regards,
kef