VPN help

Hi

Just setup Openfire and I must say very nice, thanks guys.

My problem situation.

2 Branches connected via vpn.

a) ip address of server at site A 172.16.32.5

kt.cbarnes.co.za

name of server ktbackup

b)ip address of server at site B 172.16.40.2

qt.cbarnes.co.za

name of server tserver

Under server manager - what should the name of my server be?

Server settings server to server - what do I place under domain to allow these two server to connect to each other?

Sorry if this has been posted before, I searched but all I found was internet related with dyndns etc.