If your running into trouble with PCC and getting connection errors make sure you have Port 443 open and exceptions in the firewall for
vxn.datawire.net
vxn1.datawire.net
vxn2.datawire.net
vxn3.datawire.net
even though PCC only uses 2 of the urls you need all 4 open due to the way datawire hands off connections to thier own internal servers.