do this... check this post and diagram: http://www.linksysinfo.org/modules.php?name=Forums&file=viewtopic&p=11363#11363
You can do that with a firewall script. Just add the appropriate iptables rule. This should do the trick: /sbin/iptables -t nat -A PREROUTING -p tcp --dport 443 -i vlan1 -j DNAT --to 192.168.1.99:25 and you'll probably need this too: iptables -A FORWARD -p tcp --dport 443 -i vlan1 -j ACCEPT