# /etc/protocols - Internet (IP) protocols
# IANA-assigned IP protocol numbers; see
# https://www.iana.org/assignments/protocol-numbers
#
# name          number  aliases         # comment

ip              0       IP              # internet protocol, pseudo protocol number
icmp            1       ICMP            # Internet Control Message Protocol
igmp            2       IGMP            # Internet Group Management Protocol
ggp             3       GGP             # gateway-gateway protocol
ipencap         4       IP-ENCAP        # IP encapsulated in 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
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
dccp            33      DCCP            # Datagram Congestion Control Protocol
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
rsvp            46      RSVP            # Resource Reservation Protocol
gre             47      GRE             # Generic Routing Encapsulation
esp             50      IPSEC-ESP       # Encap Security Payload
ah              51      IPSEC-AH        # Authentication Header
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
ospf            89      OSPFIGP         # Open Shortest Path First IGP
ipip            94      IPIP            # IP-within-IP Encapsulation Protocol
etherip         97      ETHERIP         # Ethernet-within-IP Encapsulation
encap           98      ENCAP           # Yet Another IP encapsulation
pim             103     PIM             # Protocol Independent Multicast
sctp            132     SCTP            # Stream Control Transmission Protocol
udplite         136     UDPLite         # UDP-Lite
mpls-in-ip      137     MPLS-in-IP      # MPLS-in-IP
