Please, read ${PREFIX}/share/doc/icradius/README. It
helps you to configure your system.

Don't forget to make required changes to 
${PREFIX}/etc/raddb/radius.conf.

Also you need to customize your database. Required files 
are placed into ${PREFIX}/share/icradius.

To use multiple login limitations, you need to install 
some additional ports:

${PORTSDIR}/net/p5-Net-Telnet
${PORTSDIR}/net/p5-SNMP_Session