I'm trying to connect to a VPN which doesn't allow HTTP access (or any access really, except RDP). So basically I'm trying to say to my computer, "only use PPP0 for RDP (port xxxx) and for everything else, use plain ol' WLAN0". Apparently this has something to do with iptables or routes but I can't figure out all the options and the tutorials I've found are quite too vague for me. So my question is as follows:
How do I specify that certain ports use certain interfaces, while other ports use other interfaces for requests originating at my system (Ubuntu 10.04)?