The shareware RADIUS TACACS Server for Windows can limit users to one
dial-in at a time. You just need to configure the login count to 1 in the
GUI, and it will limit the login count to 1. This program runs on Windows
instead of UNIX, but it can import UNIX style passwords (/etc/passwd). You
may visit Universal Networks at "http://www.hkstar.com/~unet/" for details.
Regards
+-----------------------------------------------------------+
+ Developer of Windows based Security Server +
+ +
+ TACACS, XTACACS, TACACS+ and Radius +
+ +
+ Peter Mak +
+ Universal Networks Company Limited +
+ unet@mailhub.hkstar.com +
+ http://www.hkstar.com/~unet/ +
+-----------------------------------------------------------+