How to set up replication across domain

I am trying to set up one way replication between two databases. These two databases are in different domains. I created a connection document in the NAB of the destination domain to do a pull only replication. What else do I need to do? If I need to cross certify, what id should be cross certified?

Thanks.

Subject: How to set up replication across domain

Depending on the security level you want, you either can cross certify the two servers or the two organizational certificates or the OU/O to OU/O certificates…

For more help, have a look at the Admin help db.