{"draft":"","doc_id":"RFC3514","title":" The Security Flag in the IPv4 Header ","authors":["S. Bellovin"],"format":["ASCII","HTML"],"page_count":"6","pub_status":"INFORMATIONAL","status":"INFORMATIONAL","source":"INDEPENDENT","abstract":" 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.  This memo provides information for the Internet community.  ","pub_date":"1 April 2003","keywords":["evil","evil bit"],"obsoletes":[],"obsoleted_by":[],"updates":[],"updated_by":[],"see_also":[],"doi":"10.17487\/RFC3514","errata_url":"https:\/\/www.rfc-editor.org\/errata\/rfc3514"}