Hi,
Joerg Hoehle just told me an interesting story: his employer's firewall doesn't allow outgoing connections to port 22, so he can't commit to any of common-lisp.net's repositories. However, it does allow connections to port 443.
shell.sourceforge.net, as bad as it may be, forwards port 443 to port 22. Nothing on common-lisp.net listens on port 443 at the moment, but https://common-lisp.net/ may become interesting in the future, so you'd have to set up some kind of port forwarding on another IP address. If you don't have any left, I could set up a simple port forwarding service for ssh on my machine (I have about 2 to 3 unused IP addresses free).
Please tell me if you're interested. Thanks,