Prosoft gateways and in-chassis PLC modules which are configured via Ethernet use UDP port 50000 for discovery and UDP port 3000 for configuration and online diagnostics.
Web based services for products including AN-X2 and Fieldserver gateways require TCP port 80
Some of the more common ports required for application protocols are:
TCP 502 Modbus TCP - MBTCP, MNET products
TCP 44818 Ethernet/IP - EIP and DFNT products
UDP 44818 Ethernet/IP - EIP and DFNT products
TCP 2222 Allen Bradley CSP protocol - Fieldserver
TCP 2000 Encapulated Modbus TCP - Typically used for Modbus TCP through serial to Ethernet media converters with MBTCP and MNET products.
TCP 20000 DNP3 over Ethernet - DNPNET, DNPSNET products
UDP 20000 DNP3 over Ethernet - DNPNET, DNPSNET products
UDP 47808 BACNET IP - Slotserver and Fieldserver BACNET products
UDP 1024 Fieldserver discovery service - Slotserver and Fieldserver products
UDP 18246 GE Ethernet Global Data - All EGD modules and gateways. Note that EGD exchanges may be unicast, multicast, or broadcast