Cited in: RFC 2979

5 RFCs mentioned in the text of RFC 2979 (Behavior of and Requirements for Internet Firewalls)

RFC	Title	Status	Date
821	Simple Mail Transfer ProtocolJ. Postel · obsoleted by RFC 2821	Internet Standard	August 1982
1191	Path MTU discoveryJ. Mogul, S. Deering	Draft Standard	November 1990
1869	SMTP Service ExtensionsJ. Klensin, N. Freed, M. Rose, E. Stefferud, D. Crocker · obsoleted by RFC 2821	Internet Standard	November 1995
1928	SOCKS Protocol Version 5M. Leech, M. Ganis, Y. Lee, R. Kuris, D. Koblas, L. Jones	Proposed Standard	March 1996
2119	Key words for use in RFCs to Indicate Requirement LevelsS. Bradner	Best Current Practice	March 1997