1 icmp 1 ICMP # Internet Control Message
2 igmp 2 IGMP # Internet Group Management
3 ggp 3 GGP # Gateway-to-Gateway
4 ip 4 IP # IP in IP (encasulation)
6 tcp 6 TCP # Transmission Control
8 egp 8 EGP # Exterior Gateway Protocol
9 igp 9 IGP # any private interior gateway
10 bbn-rcc-mon 10 BBN-RCC-MON # BBN RCC Monitoring
11 nvp-ii 11 NVP-II # Network Voice Protocol
13 argus 13 ARGUS # ARGUS
14 emcon 14 EMCON # EMCON
15 xnet 15 XNET # Cross Net Debugger
16 chaos 16 CHAOS # Chaos
17 udp 17 UDP # User Datagram
18 mux 18 MUX # Multiplexing
19 dcn-meas 19 DCN-MEAS # DCN Measurement Subsystems
20 hmp 20 HMP # Host Monitoring
21 prm 21 PRM # Packet Radio Measurement
22 xns-idp 22 XNS-IDP # XEROX NS IDP
23 trunk-1 23 TRUNK-1 # Trunk-1
24 trunk-2 24 TRUNK-2 # Trunk-2
25 leaf-1 25 LEAF-1 # Leaf-1
26 leaf-2 26 LEAF-2 # Leaf-2
27 rdp 27 RDP # Reliable Data Protocol
28 irtp 28 IRTP # Internet Reliable Transaction
29 iso-tp4 29 ISO-TP4 # ISO Transport Protocol Class 4
30 netblt 30 NETBLT # Bulk Data Transfer Protocol
31 mfe-nsp 31 MFE-NSP # MFE Network Services Protocol
32 merit-inp 32 MERIT-INP # MERIT Internodal Protocol
33 sep 33 SEP # Sequential Exchange Protocol
34 3pc 34 3PC # Third Party Connect Protocol
35 idpr 35 IDPR # Inter-Domain Policy Routing Protocol
37 ddp 37 DDP # Datagram Delivery Protocol
38 idpr-cmtp 38 IDPR-CMTP # IDPR Control Message Transport Proto
39 tp++ 39 TP++ # TP++ Transport Protocol
40 il 40 IL # IL Transport Protocol
41 sip 41 SIP # Simple Internet Protocol
42 sdrp 42 SDRP # Source Demand Routing Protocol
43 sip-sr 43 SIP-SR # SIP Source Route
44 sip-frag 44 SIP-FRAG # SIP Fragment
45 idrp 45 IDRP # Inter-Domain Routing Protocol
46 rsvp 46 RSVP # Reservation Protocol
47 gre 47 GRE # General Routing Encapsulation
48 mhrp 48 MHRP # Mobile Host Routing Protocol
50 esp 50 esp # Encap Security Payload
51 ah 51 AH # Authentication Header
52 i-nlsp 52 I-NLSP # Integrated Net Layer Security TUBA
53 swipe 53 SWIPE # IP with Encryption
54 nhrp 54 NHRP # NBMA Next Hop Resolution Protocol
55 mobile 55 MOBILE # IP Mobility (IP tunneling)
56 ipv6-icmp 58 icmpv6 IPv6-ICMP ICMPv6 # ICMP version 6
57 ipv6-nonxt 59 IPv6-Nonxt # No Next Header for IPv6
58 ipv6-opts 60 IPv6-Opts # Destination Options for IPv6
59 any 61 any # host internal protocol
61 any 63 any # local network
62 sat-expak 64 SAT-EXPAK # SATNET and Backroom EXPAK
63 kryptolan 65 KRYPTOLAN # Kryptolan
64 rvd 66 RVD # MIT Remote Virtual Disk Protocol
65 ippc 67 IPPC # Internet Pluribus Packet Core
66 any 68 any # distributed file system
67 sat-mon 69 SAT-MON # SATNET Monitoring
68 visa 70 VISA # VISA Protocol
69 ipcv 71 IPCV # Internet Packet Core Utility
70 cpnx 72 CPNX # Computer Protocol Network Executive
71 cphb 73 CPHB # Computer Protocol Heart Beat
72 wsn 74 WSN # Wang Span Network
73 pvp 75 PVP # Packet Video Protocol
74 br-sat-mon 76 BR-SAT-MON # Backroom SATNET Monitoring
75 sun-nd 77 SUN-ND # SUN ND PROTOCOL-Temporary
76 wb-mon 78 WB-MON # WIDEBAND Monitoring
77 wb-expak 79 WB-EXPAK # WIDEBAND EXPAK
78 iso-ip 80 ISO-IP # ISO Internet Protocol
80 secure-vmtp 82 SECURE-VMTP # SECURE-VMTP
81 vines 83 VINES # VINES
83 nsfnet-igp 85 NSFNET-IGP # NSFNET-IGP
84 dgp 86 DGP # Dissimilar Gateway Protocol
87 ospfigp 89 OSPFIGP # OSPFIGP
88 sprite-rpc 90 Sprite-RPC # Sprite RPC Protocol
89 larp 91 LARP # Locus Address Resolution Protocol
90 mtp 92 MTP # Multicast Transport Protocol
91 ax.25 93 AX.25 # AX.25 Frames
92 ipip 94 IPIP # IP-within-IP Encapsulation Protocol
93 micp 95 MICP # Mobile Internetworking Control Pro.
94 scc-sp 96 SCC-SP # Semaphore Communications Sec. Pro.
95 etherip 97 ETHERIP # Ethernet-within-IP Encapsulation
96 encap 98 ENCAP # Encapsulation Header
97 any 99 any # private encryption scheme
99 pim 103 PIM # Protocol Independant Multicast
100 ipcomp 108 IPCOMP # IP Payload Compression Protocol
101 reserved 255 Reserved #