What port does TACACS+ use?

TACACS+ uses port 49 by default. The protocol is defined in RFC 8907.

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Terminal Access Controller Access-Control System Plus

Q: What is Terminal Access Controller Access-Control System Plus?

Terminal Access Controller Access-Control System Plus (TACACS+) is a Application Layer protocol in the Authentication category. Cisco-developed AAA protocol that separates authentication, authorization, and accounting into independent transactions. Encrypts the entire payload, unlike RADIUS which only encrypts passwords.

Application Layer — Authentication

プロトコル概要

正式名称 Terminal Access Controller Access-Control System Plus

略称 TACACS+

OSIレイヤー Application Layer

カテゴリ Authentication

デフォルトポート 49

RFC RFC 8907

概要 TACACS+

Cisco-developed AAA protocol that separates authentication, authorization, and accounting into independent transactions. Encrypts the entire payload, unlike RADIUS which only encrypts passwords.

Application Layer Authentication ポート 49

標準リファレンス

TACACS+は、Internet Engineering Task Force（IETF）が発行したRFC 8907で定義されています。RFCはインターネットプロトコルの公式標準文書であり、一般公開されています。

Terminal Access Controller Access-Control System Plus

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プロトコル概要

概要 TACACS+

標準リファレンス

関連プロトコル — Application Layer