{
  "number": 3514,
  "title": "The Security Flag in the IPv4 Header",
  "authors": [
    "S. Bellovin"
  ],
  "published": "2003-04-01",
  "status": "Informational",
  "stream": "INDEPENDENT",
  "pages": 6,
  "formats": [
    "TXT",
    "HTML"
  ],
  "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.",
  "keywords": [
    "evil",
    "evil bit"
  ],
  "doi": "10.17487/RFC3514",
  "errata_url": "https://www.rfc-editor.org/errata/rfc3514",
  "urls": {
    "html": "https://rfc.dk/rfc3514/",
    "text": "https://rfc.dk/rfc3514.txt",
    "rfc_editor": "https://www.rfc-editor.org/rfc/rfc3514",
    "datatracker": "https://datatracker.ietf.org/doc/rfc3514/"
  },
  "text_modified": "2003-03-28T18:36:14Z"
}