Port directory — page 8

Message Posting Protocol port for message distribution and publishing services

Efficient Short Remote Operations protocol port for short message transmission services

BGMP protocol port for Border Gateway Multicast Protocol

Novastor Online Backup

AppleShare IP file service port for Apple file sharing protocol

H.323 call signaling port for audio-video communication protocol

Rpc2portmap service port for remote procedure call port mapping

ClearCase Load Balancing

Remote Network Connection protocol port for network device remote management

Unassigned protocol port for application-specific services

Direct Connect protocol port for peer-to-peer file transfer

Trap Convention port for system monitoring and alert services

Service Location Protocol port for network service discovery

Simple Network Paging Protocol port for paging and notification services

Retrospect service port for file system backup and recovery

Modbus TCP protocol port for industrial device communication

Remote Execution protocol port for remote command execution services

Remote Login protocol port for remote login and authentication services

TCP 515 is the LPD (line printer daemon) protocol from Unix history, kept alive for legacy printers and enterprise print servers. New deployments should prefer IPP (631) or raw jetdirect (9100).

Routing Information Protocol port for routing table information exchange

RPC Remote Procedure Call port for distributed system communication

netnews protocol port for network news transmission and distribution

UUCP Unix-to-Unix Copy Protocol port for file transfer

DHCPv6 client