Administrator's Guide

Appendix C. Lists of Reserved Ports, ICMP Types and Codes, and Internet Protocols
Protocol number Keyword Protocol
47 GRE General Routing Encapsulation
48 MHRP Mobile Host Routing Protocol
50 ESP Encapsulation Security Payload
51 AH Authentication Header
53 SWIPE IP with Encryption
54 NHRP NBMA Next Hop Resolution
Protocol
61 any host internal protocol
63 any local network
64 SAT-EXPAK SATNET and Backroom EXPAK
65 KRYPTOLAN Kryptolan
66 RVD MIT Remote Virtual Disk Protocol
68 any distributed file system
69 SAT-MON SATNET Monitoring
70 VISA VISA Protocol
75 PVP Packet Video Protocol
80 ISO-IP ISO Internet Protocol
84 TTP TTP
85 NSFNET-IGP NSFNET-IGP
86 DGP Dissimilar Gateway Protocol
87 TCF TCF
88 EIGRP EIGRP
91 LARP Locus Address Resolution Protocol
92 MTP Multicast Transport Protocol
93 AX.25 AX.25 Frames
94 IPIP IP-within-IP Encapsulation Protocol
95 MICP Mobile Internetworking Control Pro.
97 ETHERIP Ethernet-within-IP Encapsulation
98 ENCAP Encapsulation Header
99 any private encryption scheme
100 GMTP GMTP
115 L2TP Layer Two Tunneling Protocol
255 Reserved
IP intervals
This is a list of the IP addresses available for different netmasks. The first column shows the
number of bits used for the net address, i. e., is set to 1 in the netmask. The second column
maps the number of bits to a netmask on the usual octet-dot format. The third column shows
the address class for this netmask.
343