Those kind of answers aren't really practical!

Start with some kind of portmapper (I like nmap, but if you're using windows, you'll need to find another). This will allow you to know which routes are free for you to use over the gateway / router / firewall.

You can then find out whether IPs are being banned by the firewall by going to a few you know you can go using a specific port, and trying a few you can't go to.

Then you can start redirecting your packets in tunnels.

Good luck, it aint easy