Assigned Internet Protocol Numbers

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#numbers #internet #authentication #header #security #service

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本文详细介绍了IP头部的协议字段如何标识上层服务，并提供了常见协议的编号列表，包括ICMP、TCP、UDP等，这些编号用于配置防火墙、路由器和代理。

http://technet.microsoft.com/en-us/library/cc959827.aspx

http://www.iana.org/assignments/protocol-numbers/protocol-numbers.xml

Protocol Numbers

In an IP header, the Protocol field identifies the service in the next higher level in the protocol stack to which data is passed. Table C.4 shows these commonly used IP protocol numbers. Protocol numbers are used to configure firewalls, routers and proxies.

Table C.4 Common Protocol Numbers

Service	Protocol Number
Internet Control Message Protocol (ICMP)	1
Transmission Control Protocol (TCP)	6
User Datagram Protocol (UDP)	17
General Routing Encapsulation (PPTP data over GRE)	47
Authentication Header (AH) IPSec	51
Encapsulation Security Payload (ESP) IPSec	50
Exterior Gateway Protocol (EGP)	8
Gateway-Gateway Protocol (GGP)	3
Host Monitoring Protocol (HMP)	20
Internet Group Management Protocol (IGMP)	88
MIT Remote Virtual Disk (RVD)	66
OSPF Open Shortest Path First	89
PARC Universal Packet Protocol (PUP)	12
Reliable Datagram Protocol (RDP)	27
Reservation Protocol (RSVP) QoS	46