change ports on a samba server on a vps

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http://serverfault.com – As is typical, my IPS is blocking samba ports. I'm trying to setup a samba server that's on the clouds (at rackspace). How can I: 1) change the ports that samba runs on, i.e. smbd, nmbd on the vps 2) force my samba client on mac os x (default os x Finder connect) to use those ports? Thanks, Sam (HowTos)