more /etc/protocols  has some:

ip      0       IP      # internet protocol, pseudo protocol number
icmp    1       ICMP    # internet control message protocol
ggp     3       GGP     # gateway-gateway protocol
tcp     6       TCP     # transmission control protocol
egp     8       EGP     # exterior gateway protocol
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

#
# Internet (IPv6) extension headers
#
ipv6            41      IPv6            # IPv6 in IP encapsulation
ipv6-route      43      IPv6-Route      # Routing header for IPv6
ipv6-frag       44      IPv6-Frag       # Fragment header for IPv6
esp             50      ESP             # Encap Security Payload for IPv6
ah              51      AH              # Authentication Header for IPv6
ipv6-icmp       58      IPv6-ICMP       # IPv6 internet control message
protocol
ipv6-nonxt      59      IPv6-NoNxt      # No next header extension header
for IP
v6
ipv6-opts       60      IPv6-Opts       # Destination Options for IPv6

""Symon Thurlow""  wrote in message
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> Hi all,
>
> Does anyone know of a reference list of ip protocols and their numbers
>
> For example gre = 47, tcp = 6? Etc
>
> Cheers,
>
> Symon




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