DOCSLIB.ORG

Freeradius Beginner's Guide

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Freeradius Beginner's Guide www.it-ebooks.info FreeRADIUS Beginner's Guide Manage your network resources with FreeRADIUS Dirk van der Walt BIRMINGHAM - MUMBAI www.it-ebooks.info FreeRADIUS Beginner's Guide Copyright © 2011 Packt Publishing All rights reserved. No part of this book may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, without the prior written permission of the publisher, except in the case of brief quotations embedded in critical articles or reviews. Every effort has been made in the preparation of this book to ensure the accuracy of the information presented. However, the information contained in this book is sold without warranty, either express or implied. Neither the author, nor Packt Publishing, and its dealers and distributors will be held liable for any damages caused or alleged to be caused directly or indirectly by this book. Packt Publishing has endeavored to provide trademark information about all of the companies and products mentioned in this book by the appropriate use of capitals. However, Packt Publishing cannot guarantee the accuracy of this information. First published: September 2011 Production Reference: 1260811 Published by Packt Publishing Ltd. Livery Place 35 Livery Street Birmingham B3 2PB, UK. ISBN 978-1-849514-08-8 www.packtpub.com Cover Image by Asher Wishkerman ([email protected]) www.it-ebooks.info Credits Author Project Coordinator Dirk van der Walt Srimoyee Ghoshal Reviewers Proofreader Ante Gulam Chris Smith Atif Razzaq Indexers Acquisition Editor Hemangini Bari Chaitanya Apte Tejal Daruwale Development Editors Graphics Kartikey Pandey Nilesh Mohite Alina Lewis Production Coordinator Technical Editor Adline Swetha Jesuthas Vanjeet D'souza Cover Work Copy Editor Adline Swetha Jesuthas Neha Shetty www.it-ebooks.info About the Author Dirk van der Walt is an open source software specialist from Pretoria, South Africa. He is a firm believer in the potential of open source software. Being a Linux user for almost ten years, it was love at first boot. From then on Dirk spent his available time sharing his knowledge with others equally passionate about the freedom and affordability open source software gives to the community. In 2003, Dirk started coding with Perl as his language of choice and gave his full attention to functional and aesthetic user interface design. He also compiled an online Gtk2-Perl study guide to promote the advancement of Perl on the desktop. As Rich Internet Applications (RIA) became more popular, Dirk added the Dojo toolkit and CakePHP to his skills set to create an AJAX-style front-end to a FreeRADIUS MySQL database. His latest work is YFi Hotspot Manager. Today YFi Hotspot Manager is used in many localities around the globe. With many contributors to the project it proves just how well the open source software model can work. I'd like to thank the Lord Jesus for life and light, my wife Petra and daughter Daniélle for all their support and understanding, my brother Karel for his interest and help. I would also like to thank the people involved with the FreeRADIUS project, from the coders to the commenters. Lastly I'd like to thank Packt Publishing for supporting Open Source software the way they do. www.it-ebooks.info About the Reviewers Ante Gulam is a 26-year-old software and system engineer with more than seven years of working experience in various segments of the IT industry. He has worked as a consultant and system engineer on POSIX-compliant systems (Linux, BSD, SCO, and others), and lately has focused mainly on security, design, and administration of Microsoft-based enterprise solutions. Ante is currently working as a system engineer and software developer, primarily on MS platforms (.NET) in Ri-ing d.o.o., a medium-sized software development company. Being involved in security for several years Ante gained experience in the development of various security tools based on many different technologies and has written articles and co-edited Phearless Security Ezine actively for the last four years. Presently, he is working on large networking projects and enterprise environments; adopting them for standards like PCI-DSS enables him to stay in touch with security on the enterprise level. I would like to thank my family, my friends, and my girlfriend for the their patience. Also all the guys from the "gn00bz" team for all the hours full of fun and knowledge while playing CTF for the past couple of years. www.it-ebooks.info Atif Razzaq holds an MSc degree from Strathclyde University, Glasgow, UK in Communication, Control, and Digital Signal Processing, and a BSc degree in Computer Science from NUCES, Pakistan. After his MSc degree, he started his career as a software engineer in the area of Mobile Application Development in J2ME in Tricastmedia, Glasgow, UK. During this period he also published an article at Java.net titled Getting Started with BlackBerry J2ME Development. He is currently working as the Development Manager at Terminus Technologies who specializes in telecom billing software development. His responsibilities include the development of the billing system and its integration with other applications both proprietary and open source (Asterisk, FreeSwitch, FreeRADIUS, and others). Prior to joining Terminus Technologies, he worked on telecom billing at Comcerto, Bahrain. He has been working on telecom billing and VoIP/SIP Telephony for about three years. In his free time, he writes his own blog on different ICT topics available at http://atif- razzaq.blogspot.com. He can be contacted at [email protected]. It has been a great experience working on this project. I'd like to thank the whole team working on this project: the author and all members from Packt Publishing. I'd like to thank my family for giving up their share of time which I gave to this project. Finally, I'd thank the Great Lord for everything and then my parents who taught me and made me what I am. www.it-ebooks.info www.PacktPub.com Support files, eBooks, discount offers, and more You might want to visit www.PacktPub.com for support files and downloads related to your book. Did you know that Packt offers eBook versions of every book published, with PDF and ePub files available? You can upgrade to the eBook version at www.PacktPub.com and as a print book customer, you are entitled to a discount on the eBook copy. Get in touch with us at [email protected] for more details. At www.PacktPub.com, you can also read a collection of free technical articles, sign up for a range of free newsletters, and receive exclusive discounts and offers on Packt books and eBooks. http://PacktLib.PacktPub.com Do you need instant solutions to your IT questions? PacktLib is Packt's online digital book library. Here, you can access, read, and search across Packt's entire library of books. Why Subscribe? Fully searchable across every book published by Packt Copy and paste, print and bookmark content On demand and accessible via web browser Free Access for Packt account holders If you have an account with Packt at www.PacktPub.com, you can use this to access PacktLib today and view nine entirely free books. Simply use your login credentials for immediate access. www.it-ebooks.info www.it-ebooks.info Table of Contents Preface 1 Chapter 1: Introduction to AAA and RADIUS 7 Authentication, Authorization, and Accounting 7 Authentication 8 Authorization 9 Accounting 9 RADIUS 10 RADIUS protocol (RFC2865) 11 The data packet 12 AVPs 15 Vendor-Specific Attributes (VSAs) 16 Proxying and realms 17 RADIUS server 17 RADIUS client 17 RADIUS accounting (RFC2866) 18 Operation 18 Packet format 18 Acct-Status-Type (Type40) 19 Acct-Input-Octets (Type42) 20 Acct-Output-Octets (Type43) 20 Acct-Session-Id (Type44) 21 Acct-Session-Time (Type46) 21 Acct-Terminate-Cause (Type49) 21 Conclusion 21 RADIUS extensions 21 Dynamic Authorization extension (RFC5176) 21 RADIUS support for EAP (RFC3579) 22 FreeRADIUS 23 History 23 Strengths 23 www.it-ebooks.info Table of Contents Weaknesses 24 The competition 24 Summary 25 Chapter 2: Installation 27 Before you start 27 Pre-built binary 28 Time for action – installing FreeRADIUS 29 Advantages 29 Extra packages 29 Available packages 30 CentOS 30 SUSE 30 Ubuntu 31 Special considerations 31 Remember the firewall 32 CentOS 32 SUSE 33 Building from source 34 Advantages of building packages 34 CentOS 34 Time for action – building CentOS RPMs 35 Installing rpm-build 36 The source RPM package 36 The package name 36 Updating an existing installation 37 SUSE 37 Time for action – SUSE: from tarball to RPMs 37 Adding an OpenSUSE repository 37 zypper or yast -i 39 Tweaks done by hand 40 Ubuntu 40 Time for action – Ubuntu: from tarball to debs 40 Installing dpkg-dev 42 Using build-dep 42 fakeroot 42 dpkg-buildpackage 42 Installing the debs 43 For those preferring the old school 43 Installed executables 43 Running as root or not 44 Dictionary access for client programs 44 Ensure proper start-up 45 Summary 46 [ ii ] www.it-ebooks.info Table of Contents Chapter 3: Getting Started with FreeRADIUS 49 A simple setup 50 Time for action – configuring FreeRADIUS 50 Configuring FreeRADIUS 52 Clients 52 Sections 52 Client identification 53 Shared secret 53 Message-Authenticator 54 Nastype 54 Common errors 54 Users 54 Files module 54 PAP module 55 Users file 55 Radtest 57 Helping yourself 57 Installed documentation 58 Man pages 58 Time for action – discovering available man pages for FreeRADIUS 58 Configuration file comments 60 Online documentation 61 Online help 62 Golden rules 62 Inside radiusd 62 Configuration files 62 Important includes 63 Libraries and dictionaries 63 FreeRADIUS-specific AVPs 64 Running as ..
Load more

Recommended publications
  • Security on SPWF04S Module
    AN4963 Application note Security on SPWF04S module Introduction The SPWF04S seriesa of Wi-Fi modules feature security functions designed to preserve confidentiality, communication integrity and authentication during wireless communication and Internet connection, on at least two levels. The first level involves communication between peers as in access to a web server. The communication data must not be read by entities other than the client and the server; the client must ensure that the peer it communicates with is authentic. This feature is provided by the Transport Layer Security (TLS) protocol, which allows client and server applications to communication that is confidential and secure. The second level involves communication between the Wi-Fi device and the Access Point. Radio communication is very easy to intercept: an attacker just needs an antenna to read transmission packets. Encryption is a key instrument in ensuring that packets cannot be read by anything other than the two peers in communication. Security at the level of Wi-Fi network is provided by WPA2-PSK when dealing with personal networks, and WPA2-Enterprise when dealing with enterprise networks. For WPA2-PSK, setting up the module for the network is facilitated by Wi-Fi protected setup (WPS). Devices that support firmware updating via Wi-Fi or firmware over-the-air (FOTA) must be able to assess the authenticity of the firmware source and the integrity of the image file after it has been received. a SPWF04Sxxx Wi-Fi module, www.st.com/wifimodules. November 2017 DocID030067 Rev 2 1/62 www.st.com Contents AN4963 Contents 1 Transport layer security (TLS) protocol overview .......................
    [Show full text]
  • Wireless Authentication Using Radius Server
    Wireless Authentication using Radius Server Radius Server: RADIUS, which stands for “Remote Authentication Dial In User Service”, is a network protocol – a system that defines rules and conventions for communication between network devices – for remote user authentication and accounting. RADIUS is normally used to provide AAA services; Authorization, Authentication and Accounting. FreeRADIUS is the most deployed RADIUS server since it supports all common authentication protocols, being open source and simplified user administration made possible by its dialupadmin web GUI. The server also comes with modules for LDAP and database systems integration like MySQL,PostgreSQL,Oracle e.t.c. Install FreeRADIUS and Daloradius on CentOS 7 and RHEL 7 Prerequisites: Step-01: Install httpd server: # yum -y install httpd httpd-devel Start and enable httpd server # systemctl enable httpd # systemctl start httpd Check status of httpd server to make sure it’s running [root@freeradius ~]# systemctl status httpd ● httpd.service - The Apache HTTP Server Loaded: loaded (/usr/lib/systemd/system/httpd.service; enabled; vendor preset: disabled) Active: active (running) since Sun 2017-08-20 02:33:03 EDT; 7s ago Docs: man:httpd(8) man:apachectl(8) Main PID: 7147 (httpd) Status: "Processing requests..." CGroup: /system.slice/httpd.service ├─7147 /usr/sbin/httpd -DFOREGROUND ├─7194 /usr/sbin/httpd -DFOREGROUND ├─7195 /usr/sbin/httpd -DFOREGROUND ├─7196 /usr/sbin/httpd -DFOREGROUND ├─7197 /usr/sbin/httpd -DFOREGROUND └─7199 /usr/sbin/httpd -DFOREGROUND Aug 20 02:33:00 ns1.mahedi.net systemd[1]: Starting The Apache HTTP Server... Aug 20 02:33:01 ns1.mahedi.net httpd[7147]: gethostby*.getanswer: asked for ..." Aug 20 02:33:01 ns1.mahedi.net httpd[7147]: AH00558: httpd: Could not reliab...e Aug 20 02:33:02 ns1.mahedi.net httpd[7147]: gethostby*.getanswer: asked for ..." Aug 20 02:33:03 ns1.mahedi.net systemd[1]: Started The Apache HTTP Server.
    [Show full text]
  • Cost Effective RADIUS Authentication for Wireless Clients
    Database Systems Journal vol. I, no. 2/2010 27 Cost Effective RADIUS Authentication for Wireless Clients Alexandru ENACEANU Faculty of Computer Science, Romanian-American University, Bucharest, Romania [email protected] Gabriel GARAIS Faculty of Computer Science, Romanian-American University, Bucharest, Romania Network administrators need to keep administrative user information for each network device, but network devices usually support only limited functions for user management. WLAN security is a modern problem that needs to be solved and it requires a lot of overhead especially when applied to corporate wireless networks. Administrators can set up a RADIUS server that uses an external database server to handle authentication, authorization, and accounting for network security issues. Keywords: RADIUS, WLAN, Wireless Authentication, Wireless Access Control totally inadequate for a corporate wireless or Introduction Corporate wireless a campus network. That is because a 1 networks are in general the primary corporate wireless network has a lot of source of hacking into the corporate access points to reconfigure for changing the systems. The risks to users of wireless access key or adding a new MAC address to technology have increased lately, as the the allowed clients list. service has become more popular. There WLAN security can be significantly were relatively few dangers when wireless strengthened by using 802.1X to control technology was first introduced. Crackers access point access and deliver dynamic had not yet had time to latch on to the new keys to authenticated users. Authentication technology and wireless was not commonly Servers based on the RADIUS protocol play found in the work place.
    [Show full text]
  • Experiences with BOWL: Managing an Outdoor Wifi Network (Or How to Keep Both Internet Users and Researchers Happy?) T
    Experiences with BOWL: Managing an Outdoor WiFi Network (or How to Keep Both Internet Users and Researchers Happy?) T. Fischer, T. Huhn,¨ R. Kuck, R. Merz, J. Schulz-Zander, C. Sengul TU Berlin/Deutsche Telekom Laboratories {thorsten,thomas,rkuck,julius,cigdem}@net.t-labs.tu-berlin.de,[email protected] Abstract The Berlin Open Wireless Lab (BOWL) project at Technische Universitat¨ Berlin (TUB) maintains an out- door WiFi network which is used both for Internet ac- cess and as a testbed for wireless research. From the very beginning of the BOWL project, we experienced several development and operations challenges to keep Internet users and researchers happy. Development chal- lenges included allowing multiple researchers with very different requirements to run experiments in the network while maintaining reliable Internet access. On the oper- ations side, one of the recent issues we faced was au- thentication of users from different domains, which re- quired us to integrate with various external authentica- tion services. In this paper, we present our experience Figure 1: Coverage of the BOWL network on the TU- in handling these challenges on both development and Berlin campus. operations sides and the lessons we learned. Keywords: WiFi, configuration management, authenti- a variety of other networks and infrastructures which are cation, research, DevOps, infrastructure, testbed not controlled by the BOWL project, adding to the in- 1 Introduction herent complexity of running a production network. In this paper, we focus on two of our many challenges that Wireless testbeds are invaluable for researchers to test we have experienced in the last year while moving from their solutions under real system and network condi- a prototype to a more stable infrastructure.
    [Show full text]
  • FREERADIUS TECHNICAL GUIDE CHAPTER 1 - INTRODUCTION WHAT IS FREERADIUS? Chapter 1 - Introduction
    THE FREERADIUS TECHNICAL GUIDE CHAPTER 1 - INTRODUCTION WHAT IS FREERADIUS? Chapter 1 - Introduction This chapter describes: • What is RADIUS? • What is FreeRADIUS? • FreeRADIUS benefits • FreeRADIUS case studies 1.0 What is RADIUS? RADIUS, which stands for “Remote Authentication Dial In User Service”, is a network protocol - a system that defines rules and conventions for communication between network devices - for remote user authentication and accounting. Commonly used by Internet Service Providers (ISPs), cellular network providers, and corporate and educational networks, the RADIUS protocol serves three primary functions: • Authenticates users or devices before allowing them access to a network • Authorizes those users or devices for specific network services • Accounts for and tracks the usage of those services For a detailed look at how RADIUS performs these functions, see section 2.2, “The RADIUS Session Process”, on page 11. 1.0.1 History In 1991, Merit Network, a non-profit internet provider, required a creative way to manage dial-in access to various Points-Of-Presence (POPs) across its network. In response to this need, RADIUS was created by Livingston Enterprises. At the time RADIUS was created, network access systems were distributed across a wide area and were run by multiple independent organizations. Central administrators wanted to prevent problems with security and scalability, and thus did not want to distribute user names and passwords; instead, they wanted the remote access servers to contact a central server to authorize access to the requested system or service. In response to contact from the remote access server, the central server would return a “success” or “failure” message, and the remote machines would be in charge of enforcing this response for each end user.
    [Show full text]
  • RADIUS and Freeradius
    RADIUS and FreeRADIUS Chris Wilson, Aptivate Ltd. Presented at AfNOG 2014 Based on “FreeRADIUS Install and Configuration” by Frank A. Kuse Download this presentation at: http://github.com/afnog/sse/tree/master/radius Ingredients Theory What is RADIUS Why use RADIUS How RADIUS works User databases Attributes Practical Installing FreeRADIUS Adding RADIUS users Authenticating services that use PAM What is RADIUS? Remote Authentication Dial In User Service Authentication “Who are you?” Authorization “What services am I allowed to give you?” Accounting “What did you do with my services while you were using them?” Why RADIUS? What are the alternatives? LDAP, Kerberos, Active Directory Advantages of RADIUS: Lightweight and efficient Supported by many clients, e.g. 802.1x, switches and routers Disadvantages of RADIUS: Limited attribute set, limited use for desktop authentication How does RADIUS work? Authentication Password authentication, plain text and hashed Lookup in various user databases: passwd, SQL, text Authorization Using a set of rules or other templates Accounting Measuring, communicating and recording resources accessed by user See Wikipedia for list of RFCs RADIUS Architecture RADIUS protocol is between NAS and AAA server NAS controls access to protected resource What does RADIUS do? NAS sends an Authentication-Request to AAA server user name password hashed with secret shared some client specific information AAA server receives an Authentication-Request consults password databases: looks
    [Show full text]
  • Django-Freeradius Documentation Release 0.1
    django-freeradius Documentation Release 0.1 Fiorella De Luca Sep 10, 2020 Contents: 1 Setup 3 1.1 Create a virtual environment.......................................3 1.2 Install required system packages.....................................3 1.3 Install stable version from pypi.....................................3 1.4 Install development version.......................................4 1.5 Setup (integrate in an existing django project)..............................4 1.6 Migrating an existing freeradius database................................5 1.7 Installing for development........................................5 1.8 Troubleshooting.............................................6 1.9 Automating management commands..................................6 2 Available settings 9 2.1 DJANGO_FREERADIUS_EDITABLE_ACCOUNTING ........................9 2.2 DJANGO_FREERADIUS_EDITABLE_POSTAUTH ..........................9 2.3 DJANGO_FREERADIUS_GROUPCHECK_ADMIN ...........................9 2.4 DJANGO_FREERADIUS_GROUPREPLY_ADMIN ...........................9 2.5 DJANGO_FREERADIUS_USERGROUP_ADMIN ............................ 10 2.6 DJANGO_FREERADIUS_DEFAULT_SECRET_FORMAT ....................... 10 2.7 DJANGO_FREERADIUS_DISABLED_SECRET_FORMATS ..................... 10 2.8 DJANGO_FREERADIUS_RADCHECK_SECRET_VALIDATORS ................... 10 2.9 DJANGO_FREERADIUS_BATCH_DEFAULT_PASSWORD_LENGTH ................ 11 2.10 DJANGO_FREERADIUS_BATCH_DELETE_EXPIRED ........................ 11 2.11 DJANGO_FREERADIUS_BATCH_PDF_TEMPLATE ......................... 11 2.12 DJANGO_FREERADIUS_API_TOKEN
    [Show full text]
  • Building, Installing, and Configuring a RADIUS Server George Mays, CCNA, A+, Network+, Security+, CTT+, I-Net+
    Expert Reference Series of White Papers Building, Installing, and Configuring a RADIUS Server 1-800-COURSES www.globalknowledge.com Building, Installing, and Configuring a RADIUS Server George Mays, CCNA, A+, Network+, Security+, CTT+, I-Net+ Introduction I work often with a variety of networking devices from different manufacturers. In many cases the equipment is simply being evaluated, configured for demonstration purposes, or incorporated into a lab for classroom use. RADIUS is supported by a lot of these gadgets but I have never found a handy-dandy inexpensive and easy to use RADIUS server. Well, let’s build one. RADIUS is an acronym for Remote Authentication Dial-In User Services. It is an AAA tool intended to be useful in instances where the user would like to centralize management of authentication, authorization, and accounting functions (hence the AAA). Authentication, or proving that users are who they claim to be, is the primary reason that most people are driven to want a RADIUS server. But the authorization (limiting what a user is allowed to do once they have been authenticated) and accounting (logging and billing functions) will be of interest to some people, too. Where I most often like to demonstrate the use of RADIUS is in the configuration of Ethernet switches and IEEE 802.11 access points. For switches, RADIUS is most often used in conjunction with IEEE 802.1x port-based network access controls, which can in turn be used to control the identity of users who are allowed access to specific ports. For access points the same mechanism is actually in play, but it is used to limit who can associate with the wireless network.
    [Show full text]
  • 802.1X for Home Users and Guest Networks
    Author Stefan Neuhuber Submission Institut of Networks and Security Thesis Supervisor Univ.-Prof. Priv.-Doz. DI Dr. René Mayrhofer February, 2017 802.1x for home users and guest networks Master’s Thesis to confer the academic degree of Diplom-Ingenieur in the Master’s Program Computer Science JOHANNES KEPLER UNIVERSITY LINZ Altenbergerstraße 69 4040 Linz, Österreich www.jku.at DVR 0093696 Contents 1. Introduction ....................................... 1 1.1. Motivation . 1 1.2. Threat Model and security concerns . 2 1.3. Structure . 2 2. State of the art ..................................... 3 3. Employed Technologies and Tools ........................... 8 3.1. OpenWrt . 8 3.1.1. Architecture . 9 3.1.2. Build System . 9 3.1.3. Flash Memory Layout . 10 3.1.4. The Unified Configuration Interface (UCI) System . 13 3.2. Port-Based Authentication - 802.1x . 15 3.2.1. Primary Components . 17 3.2.2. Authentication Process . 19 3.2.2.1. Communication between Supplicant and Authenticator (802.1x) . 20 3.2.2.2. Communication between Authenticator and Authentication Server (RADIUS) . 22 3.2.2.3. Communication between Supplicant and Authentication Server (EAP-Method) . 23 3.3. EAPoL/EAPoW Protocol . 24 3.3.1. Packet Structure . 25 Version . 25 Type..................................... 25 Length . 26 Packet Body . 26 3.4. Extensible Authentication Protocol (EAP) . 26 3.4.1. Packet Structure . 27 Code..................................... 28 Identifier . 28 Length . 29 I Data . 29 3.4.2. Packet Types . 29 EAP-Request/Response . 29 EAP-Success/Failure . 30 3.4.3. EAP-Methods . 30 3.4.3.1. Packet Structure . 31 Type ................................. 31 Data . 31 3.4.3.2.
    [Show full text]
  • CHAPTER 6 - EAP AUTHENTICATION the PROCESS Chapter 6 - EAP Authentication
    THE FREERADIUS IMPLEMENTATION GUIDE CHAPTER 6 - EAP AUTHENTICATION THE PROCESS Chapter 6 - EAP Authentication This chapter describes using Extensible Authentication Protocol with FreeRADIUS. The following topics are discussed in this chapter: • EAP Overview • Types/Methods • Testing with eapol_test • TLS based EAP methods • Certificates 6.0 EAP Overview EAP stands for Extensible Authentication Protocol. The extensible portion of the EAP acronym describes the intended use of the protocol: EAP is a simple wrapper that can transport other authentication methods. These other methods are independent of the encapsulating EAP layer and are independent of each other. EAP provides only for authentication. There is no way to transport authorization data in EAP (as opposed to RADIUS, which can send authorization data); therefore, only success and failure can be transported in EAP - other information such as IP address assignments and session timeouts cannot be transported in this manner. The protocol originally started out in PPP, where it was intended to replace the use of PAP and CHAP. Since then, it has gained wider use in wired and wireless network authentication, especially with 802.1X When used in conjunction with RADIUS, EAP requires the following participants (the names used here are taken from the IEEE 802.1X standard): • Supplicant The supplicant is the machine that requests network access to a Local Area Network (LAN). It contains the credentials used for authentication, and it is one end of the EAP exchange. • Authenticator The authenticator is the Access Point or switch that controls access to the LAN. It allows or denies network access based on the status returned by EAP.
    [Show full text]
  • Radius: a Remote Authentication Dial-In User Service
    InSight: RIVIER ACADEMIC JOURNAL, VOLUME 5, NUMBER 2, FALL 2009 RADIUS: A REMOTE AUTHENTICATION DIAL-IN USER SERVICE Daniel Szilagyi*, Arti Sood** and Tejinder Singh§ M.S. in Computer Science Program, Rivier College Abstract This paper provides an overview of RADIUS deployment in the network. It also introduces the various protocols, such as EAP, that is used to implement this service, and PAP, CHAP, MSCHAP, EAP-TLS, EAP-TTLS, EAP- LEAP, EAP-FAST, EAP-FAST that provide authentication mechanisms. These protocols are not discussed in detail but only to present the idea of workflow as to how the RADIUS works in conjunction with them. The role of RADIUS is outlined in point-to-point and VPN connection. Also the 802.1x framework and RADIUS are described briefly. The various AAA protocols are discussed briefly along with DIAMETER, an enhanced version of the RADIUS protocol. This paper is intended for readers with Computer Science or Information Technology background. 1. Overview With growing numbers of remote users like telecommuters using wireless laptops, PDA(s) trying to access the network, Remote Authentication Dial-In User Service (RADIUS) is widely used. RADIUS, a distributed service, provides centralized management of user access control and security. RADIUS manages and secures the Wireless Local Area Network (WLAN), remote Virtual Private Network (VPN), and wired access. RADIUS is available as a standalone service like Internet Authentication Service (IAS), Access Control Server (ACS) etc. It may also be embedded in the network devices such as routers, switches etc. Users are authenticated by the RADIUS server against a central database which stores profile data such as passwords, type of access, etc.
    [Show full text]
  • 7360 Freeradius Category: Experimental September 2014 ISSN: 2070-1721
    Internet Engineering Task Force (IETF) A. DeKok Request for Comments: 7360 FreeRADIUS Category: Experimental September 2014 ISSN: 2070-1721 Datagram Transport Layer Security (DTLS) as a Transport Layer for RADIUS Abstract The RADIUS protocol defined in RFC 2865 has limited support for authentication and encryption of RADIUS packets. The protocol transports data in the clear, although some parts of the packets can have obfuscated content. Packets may be replayed verbatim by an attacker, and client-server authentication is based on fixed shared secrets. This document specifies how the Datagram Transport Layer Security (DTLS) protocol may be used as a fix for these problems. It also describes how implementations of this proposal can coexist with current RADIUS systems. Status of This Memo This document is not an Internet Standards Track specification; it is published for examination, experimental implementation, and evaluation. This document defines an Experimental Protocol for the Internet community. This document is a product of the Internet Engineering Task Force (IETF). It represents the consensus of the IETF community. It has received public review and has been approved for publication by the Internet Engineering Steering Group (IESG). Not all documents approved by the IESG are a candidate for any level of Internet Standard; see Section 2 of RFC 5741. Information about the current status of this document, any errata, and how to provide feedback on it may be obtained at http://www.rfc-editor.org/info/rfc7360. DeKok Experimental [Page 1] RFC 7360 DTLS as a Transport Layer for RADIUS September 2014 Copyright Notice Copyright (c) 2014 IETF Trust and the persons identified as the document authors.
    [Show full text]