Title: The Security Flag in the IPv4 Header
Author(s): S. Bellovin.
Status: INFORMATIONAL
Date: 01 Apr 2003
Length: 11211
Firewalls, packet filters, intrusion detection systems, and the like often have difficulty distinguishing between packets that have malicious intent and those that are merely unusual. We define a security flag in the IPv4 header as a means of distinguishing the two cases.
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