does sql replication require additonal ports open through a firewall?

hi there,

I have a remote sql box that i'm trying to replicate with over a vpn and through a firewall.

I can get to it with pings and enterprise manager, but when i try to create a pull subscription I can't see the package that I've created in the wizard - even though I can see it in enterprise manager....

I'm wondering if there more ports that need to be opened for this to work...

Any suggestions or other thoughts gratefully received...