At school, our network is behind a firewall which prevents using telnet. I have been told I will receive extra credit points if I can figure out how to get around it without asking the network administrator for access.

I'm hoping somebody can point me towards tutorials/info that are relevant to my query.
The computer I use is running XP Professional, I'm not sure exactly what the school is using for a firewall, but I believe the server may be IIS exchange server.

I don't need to get into the system from outside, just telnet out of the system.

I'm not sure quite what I'm looking for SSH? Tunnel? Proxy? Port Forwarding? Just a little direction so I'm searching for the right information would be greatly appreciated.

Thanks in advance.