ISA 2004 - open ports -what kind of rule?

We have SBS 2003 with ISA Server 2004. We are installing an appliance (Mail Archiving) that will have its own IP address on the network. The instructions say to open certain ports. For example:

Port: 123

Direction: In/Out

TCP: NO

UDP: YES

Would we create Access Rules for each port or do we create Server Publishing rules?  Basically the appliance needs to be able to be remotely supported and receive updates from Internet.

Thank you!