WS2012 RDGW NLB port rules

Hi. We're creating new RDGW NLB farm based on WS2012. We're still using the only (that I know of) guide at http://blogs.msdn.com/b/rds/archive/2009/03/24/improving-ts-gateway-availability-using-nlb.aspx.

Since WS2012 supports the new UDP transport at port 3391, is it required/expected to add separate port rule for this port in NLB configuration? Since the original guide only mentions TCP/443. Or does the communication with RDGW always happens only via 443?

Thanks in advance