Security Strategies in Linux Platforms and Applications, 3rd Edition

Securing Modem Connections

Again, this is highly unlikely, but in some cases, you may still have older environments you need to support. If you have to administer connections from telephone modems, the standard used is the Remote Authentication Dial In User Service (RADIUS). The open source implementation of this software is based on the work of the FreeRADIUS project, available from http://freeradius.org/. The implementation of a RADIUS server, including FreeRADIUS, will not be covered here. However, it can be downloaded from the noted website and is also available from standard Ubuntu software repositories. If you need remote user authentication, you may also look into DIAMETER, which is an enhancement of RADIUS—the joke, of course, being ...