To avoid compromising your systems at work and getting in to trouble I suggest use a port forwarding proxy.
There's a few interesting leads off here:
Or use a commerial one. With the demise of SafeWeb and the cost of Anonymizer you could take advantage of the free trials from OrangaTango.com
One I've used for accessing Control Panel and I strongly recommend is J Marshall's CGI Proxy. Using this installer you can be up and running in two minutes
I installed it on my own webspace to access my own Control Panel. Until then there was no way I could configure my site bacuse the national firewall was blocking the ports at that time.I
strongly advise that one you've got used to it you move it to a password protected folder in case others find it and start abusing it.
I also suggest you rename it (but you must keep the NPH prefix) in case your IS dept see it in the logs and find it suspicious!
And here's one which I think works
Oh, and to give credit to Mr Marshall - here's his site