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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] RE: [FW1] IP Protocol 50 and 51
Verbatim: PROTOCOL NUMBERS (http://www.isi.edu/in-notes/iana/assignments/protocol-numbers) In the Internet Protocol version 4 (IPv4) [RFC791] there is a field, called "Protocol", to identify the next level protocol. This is an 8 bit field. In Internet Protocol version 6 (IPv6) [RFC1883] this field is called the "Next Header" field. PORT NUMBERS (http://www.isi.edu/in-notes/iana/assignments/port-numbers) The port numbers are divided into three ranges: the Well Known Ports, the Registered Ports, and the Dynamic and/or Private Ports. The Well Known Ports are those from 0 through 1023. The Registered Ports are those from 1024 through 49151 The Dynamic and/or Private Ports are those from 49152 through 65535 WELL KNOWN PORT NUMBERS The Well Known Ports are assigned by the IANA and on most systems can only be used by system (or root) processes or by programs executed by privileged users. Ports are used in the TCP [RFC793] to name the ends of logical connections which carry long term conversations. For the purpose of providing services to unknown callers, a service contact port is defined. This list specifies the port used by the server process as its contact port. The contact port is sometimes called the "well-known port". To the extent possible, these same port assignments are used with the UDP [RFC768]. The range for assigned ports managed by the IANA is 0-1023. Chris -----Original Message----- From: Vaughn, Ralph S [mailto:[email protected]] Sent: Tuesday, February 06, 2001 3:28 PM To: '[email protected]' Subject: [FW1] IP Protocol 50 and 51 Can someone explain IP Protocol 50/50 versus ports 50 and 51. Is there a difference, if so what. thanks in advance Ralph S. Vaughn Centers for Disease Control and Prevention Network Technology Branch Phone:Pager:Email: [email protected] ============================================================================ ==== To unsubscribe from this mailing list, please see the instructions at http://www.checkpoint.com/services/mailing.html ============================================================================ ==== ================================================================================ To unsubscribe from this mailing list, please see the instructions at http://www.checkpoint.com/services/mailing.html ================================================================================
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