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Services that run over IP and perform application/transport layer functions can be uniquely identified by IP protocol numbers. IP can carry data for a number of different protocols. These protocols are each identified by a unique IP protocol number specified in a field of the IP header. For example, ICMP, IGMP and EGP have protocol numbers 1, 2 and 8 respectively. The ServiceIPProto object type allows a Service to be defined based on these numbers by assigning them to the object's IPProto property.
Similar to the TCP/UDP port ranges described previously, a range of IP protocol numbers can be used to specify multiple applications for one service. For example, specifying the range 1-4,7 will match the protocols ICMP, IGMP, GGP, IP-in-IP and CBT.
IP protocol numbers
The currently assigned IP protocol numbers and references are published by the Internet Assigned Numbers Authority (IANA) and can be found at: