SAP Ports
Open these TCP/IP Ports to ensure a Firewall will allow NLINK to communicate to SAP:
SAP IP ports (where ## = SAP system number):
RFC (gateway, sapgw##): 33##
Load Balancing (message server, sapms##): 36##
SNC communication: 48##
If you have SAPGUI also installed on the NLINK Server (not necessary, but might be convenient) you must also open:
GUI (dispatcher, sapdp##): 32##