2008/5/7 Puneet Lakhina puneet.lakhina@gmail.com:
s/svn/WebDAV/g
The correct term to use here would be WebDAV over http (instead of svn over http). I suppose the reason for blocking would be that WebDAV is an extension of the http protocol. It adds certain methods like PROPFIND, COPY etc. So if your ISP blocks anything other than the basic HTTP methods (get,post, head,put,delete,options,trace) it will block WebDAV.
https is generally transparently proxied, so that should solve your problem.
on an unrelated note, i thought its not possible to transparently proxy HTTPS connections.
Anurag