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DI-304/DI-304M ISDN Remote Router
Appendix C – IP Protocol and Port
Numbers
Common Internet service protocols and IP port numbers.
IP Protocol Numbers
Protocol # Protocol Name Description
1 ICMP Internet Control Message [RFC792]
2 IGMP Internet Group Management [RFC1112]
6 TCP Transmission Control [RFC793]
8 EGP Exterior Gateway Protocol [RFC888,DLM1]
9 IGP any private interior gateway [IANA]
(used by Cisco for their IGRP)
17 UDP User Datagram [RFC768,JBP]
46 RSVP Reservation Protocol [Bob Braden]
88 EIGRP EIGRP [CISCO,GXS]
115 L2TP Layer Two Tunneling Protocol [Aboba]
IP Port Numbers
Service TCP UDP Notes
FTP 21 File Transfer
Telnet 23
SMTP 25 Simple Mail Transfer
DNS 53 53 Domain Name Server
Finger 79
WWWHTTP 80 World Wide Web HTTP
POP3 110 Post Office Protocol – Version 3
137 137 NetBios Name Service
138 138 NetBios Datagram Service
139 139 NetBios Session Service
SNMP 161
SNMP Trap 162
90