You can tunnel your connections through the firewall.
They may be some free tunnels out there but I havent found any free tunnel with quality bandwidth.
Here are some commercial tunnels that I have tried:
1-httptunnel
5$ per month unlimited speed
low response make the kazaa download sometimes stay in "connecting" status. I prefer option 2.
http://http-tunnel.com/
2-Socks2HTTP
10$ per month for 25KBytes/s
Tunnel has exellent response and speed but limited to 25KB/s (faster is more expensive)
http://www.totalrc.net
3-hopster
10$ per month
if you ever come acress this service, forget it. Their webpage looks cute but they suck.
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You can try any of these services by paying one month only.