rsync behind NAT

[Anand]

Hi

I use rsync as a client to copy a directory structure from a remote
server, once every month.

Until a few weeks ago, we had direct access to the internet - and the way
it would work is that the guy maintaining the rsync server would add my
machine's IP to an access list and I would run the rsync command from my
machine.

Recently however, our network was 'upgraded' to a NAT system. I do not
know what exactly that means - but in effect, the remote rsync server
cannot see my computer's IP address anymore. I use a 'proxy' server to
connect to the internet.

Can someone tell me how I can continue rsyncing from the remote server in
this setup ?

regs,
AnandO.