+# Internet (IP) protocols
+#
+# Updated from http://www.iana.org/assignments/protocol-numbers and other
+# sources.
+# New protocols will be added on request if they have been officially
+# assigned by IANA and are not historical.
+# If you need a huge list of used numbers please install the nmap package.
+
+ip 0 IP # internet protocol, pseudo protocol number
+#hopopt 0 HOPOPT # IPv6 Hop-by-Hop Option [RFC1883]
+icmp 1 ICMP # internet control message protocol
+igmp 2 IGMP # Internet Group Management
+ggp 3 GGP # gateway-gateway protocol
+ipencap 4 IP-ENCAP # IP encapsulated in IP (officially ``IP'')
+st 5 ST # ST datagram mode
+tcp 6 TCP # transmission control protocol
+egp 8 EGP # exterior gateway protocol
+igp 9 IGP # any private interior gateway (Cisco)
+pup 12 PUP # PARC universal packet protocol
+udp 17 UDP # user datagram protocol
+hmp 20 HMP # host monitoring protocol
+xns-idp 22 XNS-IDP # Xerox NS IDP
+rdp 27 RDP # "reliable datagram" protocol
+iso-tp4 29 ISO-TP4 # ISO Transport Protocol class 4 [RFC905]
+xtp 36 XTP # Xpress Transfer Protocol
+ddp 37 DDP # Datagram Delivery Protocol
+idpr-cmtp 38 IDPR-CMTP # IDPR Control Message Transport
+ipv6 41 IPv6 # Internet Protocol, version 6
+ipv6-route 43 IPv6-Route # Routing Header for IPv6
+ipv6-frag 44 IPv6-Frag # Fragment Header for IPv6
+idrp 45 IDRP # Inter-Domain Routing Protocol
+rsvp 46 RSVP # Reservation Protocol
+gre 47 GRE # General Routing Encapsulation
+esp 50 IPSEC-ESP # Encap Security Payload [RFC2046]
+ah 51 IPSEC-AH # Authentication Header [RFC2402]
+skip 57 SKIP # SKIP
+ipv6-icmp 58 IPv6-ICMP # ICMP for IPv6
+ipv6-nonxt 59 IPv6-NoNxt # No Next Header for IPv6
+ipv6-opts 60 IPv6-Opts # Destination Options for IPv6
+rspf 73 RSPF CPHB # Radio Shortest Path First (officially CPHB)
+vmtp 81 VMTP # Versatile Message Transport
+eigrp 88 EIGRP # Enhanced Interior Routing Protocol (Cisco)
+ospf 89 OSPFIGP # Open Shortest Path First IGP
+ax.25 93 AX.25 # AX.25 frames
+ipip 94 IPIP # IP-within-IP Encapsulation Protocol
+etherip 97 ETHERIP # Ethernet-within-IP Encapsulation [RFC3378]
+encap 98 ENCAP # Yet Another IP encapsulation [RFC1241]
+# 99 # any private encryption scheme
+pim 103 PIM # Protocol Independent Multicast
+ipcomp 108 IPCOMP # IP Payload Compression Protocol
+vrrp 112 VRRP # Virtual Router Redundancy Protocol
+l2tp 115 L2TP # Layer Two Tunneling Protocol [RFC2661]
+isis 124 ISIS # IS-IS over IPv4
+sctp 132 SCTP # Stream Control Transmission Protocol
+fc 133 FC # Fibre Channel
+