LinuxSecurity.com
Share your story
The central voice for Linux and Open Source security news
Home News Topics Advisories HOWTOs Features Newsletters About Register

Welcome!
Sign up!
EnGarde Community
Login
Polls
What is the most important Linux security technology?
 
Advisories
Community
Linux Events
Linux User Groups
Link to Us
Security Center
Book Reviews
Security Dictionary
Security Tips
SELinux
White Papers
Featured Blogs
All About Linux
DanWalsh LiveJournal
Securitydistro
Latest Newsletters
Linux Advisory Watch: November 21st, 2014
Linux Security Week: November 17th, 2014
Subscribe
LinuxSecurity Newsletters
E-mail:
Choose Lists:
About our Newsletters
RSS Feeds
Get the LinuxSecurity news you want faster with RSS
Powered By

  
What is needed

2. What is needed

This section describes what is needed for the authentication gateway.

2.1. Netfilter

The authentication gateway uses Netfilter and iptables to manage the firewall. Please see the Netfilter HOWTO .

2.2. Software for dynamic Netfilter rules.

One means to insert and remove Netfilter rules is to use pam_iptables. This is a pluggable authentication module (PAM) written by Nathan Zorn that can be found at http://www.itlab.musc.edu/~nathan/pam_iptables . This PAM module allows users to use ssh and telnet to authenticate to the gateway.

Another means to dynamically remove and create Netfilter rules is to use NocatAuth. NocatAuth can be found at http://nocat.net . NocatAuth provides a web client for authenticating to the gateway.

2.3. DHCP Server

The authentication gateway will act as the dynamic host configuration protocol (DHCP) server for the public network. It only serves those requesting DHCP services on the public network. I used the ISC DHCP Server .

2.4. Authentication mechanism

The gateway can use any means of PAM authentication. The authentication mechanism the Medical University of South Carolina uses is LDAP. Since LDAP was used for authentication, the pam modules on the gateway box were set up to use LDAP. More information can be found at http://www.padl.com/pam_ldap.html . PAM allows you to use many means of authentication. Please see the documentation for the PAM module you would like to use. For more information on other methods, see pam modules .

If NocatAuth is used, an authentication service needs to be setup. The NocatAuth authentication service supports authentication with LDAP,RADIUS,MySQL,and a password file. More information can be found at http://nocat.net/download/NoCatAuth/ .

2.5. DNS Server

The gateway box also serves as a DNS server for the public network. I installed Bind, and set it up as a caching nameserver. The rpm package caching-namserver was also used. This package came with Red Hat.

    
Partner

 

Latest Features
Peter Smith Releases Linux Network Security Online
Securing a Linux Web Server
Password guessing with Medusa 2.0
Password guessing as an attack vector
Squid and Digest Authentication
Squid and Basic Authentication
Demystifying the Chinese Hacking Industry: Earning 6 Million a Night
Free Online security course (LearnSIA) - A Call for Help
What You Need to Know About Linux Rootkits
Review: A Practical Guide to Fedora and Red Hat Enterprise Linux - Fifth Edition
Yesterday's Edition
Partner Sponsor

Community | HOWTOs | Blogs | Features | Book Reviews | Networking
 Security Projects |  Latest News |  Newsletters |  SELinux |  Privacy |  Home
 Hardening |   About Us |   Advertise |   Legal Notice |   RSS |   Guardian Digital
(c)Copyright 2014 Guardian Digital, Inc. All rights reserved.