RadSec
title: "RadSec" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["internet-protocols", "application-layer-protocols", "computer-access-control-protocols"] topic_path: "technology/networking" source: "https://en.wikipedia.org/wiki/RadSec" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0
RadSec is a protocol for transporting RADIUS datagrams over TCP and TLS.
The RADIUS protocol is a widely deployed authentication and authorization protocol. The supplementary RADIUS Accounting specification{{cite web | url = http://tools.ietf.org/html/rfc2866 | title = RFC2866: RADIUS Accounting | date = June 2000 | last1 = Rigney | first1 = Carl
In order to address these privacy and security issues, the "RADIUS Extensions" working group{{cite web | url = http://www.ietf.org/html.charters/radext-charter.html | title = RADIUS Extensions Working Group charter | url = https://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.xhtml?search=2083 | title = IANA Port 2083
The use of RadSec goes back to preliminary vendor implementations. The standard name for RADIUS over TLS as defined in is RADIUS/TLS. There is also RADIUS/DTLS which was defined in .
The main focus of RADIUS/TLS is to provide a means to secure the communication between RADIUS peers on the transport layer. The most important use of RADIUS/TLS lies in roaming environments where RADIUS packets need to be transferred through different administrative domains and untrusted, potentially hostile networks. An example for a world-wide roaming environment that uses RADIUS/TLS to secure communication is eduroam.{{cite web | url = http://www.eduroam.org | title = eduroam
References
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