Editing TACACS (section)

==History==
TACACS was originally developed in 1984 by BBN, later known as [[BBN Technologies]], for administration of ARPANET and MILNET, which ran unclassified network traffic for [[DARPA]] at the time and would later evolve into the [[U.S. Department of Defense]]'s [[NIPRNet]]. Originally designed as a means to automate authentication &ndash; allowing someone who was already logged into one host in the network to connect to another on the same network without needing to re-authenticate &ndash; it was first formally described by BBN's Brian Anderson TAC Access Control System Protocols, BBN Tech Memo CC-0045 with minor TELNET double login avoidance change in December 1984 in [[IETF]] RFC 927.<ref name="dooley">{{cite book | author1=Dooley, Kevin | url=http://shop.oreilly.com/product/9780596003678.do | title=Cisco Cookbook | publisher=O'Reilly Media | author2=Brown, Ian | year=2003 | pages=137 | isbn=9781449390952 | url-status=live | archive-url=https://web.archive.org/web/20160624221754/http://shop.oreilly.com/product/9780596003678.do | archive-date=2016-06-24 }}</ref>{{ref RFC|927}} [[Cisco Systems]] began supporting TACACS in its networking products in the late 1980s, eventually adding several extensions to the protocol. In 1990, Cisco's extensions on top of TACACS became a proprietary protocol called Extended TACACS (XTACACS). Although TACACS and XTACACS are not open standards, Craig Finseth of the University of Minnesota, with Cisco's assistance, published a description of the protocols in 1993 as [[Internet Engineering Task Force|IETF]] RFC 1492 for informational purposes.<ref name="dooley" /><ref name="ballad">{{cite book | title=Access Control, Authentication, and Public Key Infrastructure | publisher=Jones & Bartlett Learning | author1=Ballad, Bill | author2=Ballad, Tricia | author3=Banks, Erin | year=2011 | pages=278–280 | isbn=9780763791285}}</ref>{{ref RFC|1492}}