firewall and port forwarding

Hi pls excuse my ignorance, very new to Linux! 2 x nics in suse 7 server routes adsl to win98/2000 boxes (ip masquerading) - works extremely well. I want to use vnc for remote access. What do I need to set in the firewall.config ? I entered what i thought was coorect addresses but still no luck, the example in the file is not very clear to me. I would be extremely grateful of any assistance many thanks Terry Reynolds I.T. Manager Security and reliability of e-mails are not guaranteed. We operate anti-virus programmes but you must take full responsibility for virus checking this e-mail (including all attachments). Action Express Group do not accept any liability in respect of any damage caused by any virus which is not detected.