Activating simultaneous login limit on Freeradius

For those who are too lazy to read the Simultaneous-Use document in
Freeradius 1.0.1, here's how to do it, but I opted to use SNMP_Session
and BER modules:

1. Download SNMP_Session and BER from

http://www.switch.ch/misc/leinen/snmp/perl/

2. Extract and

#cd SNMP_Session-1.07/
#perl Makefile.PL
#make test
#make install

3. Edit /etc/raddb/users file and insert the following lines:

DEFAULT Simultaneous-Use := 1
Fall-Through = 1

(It may differ if you want to define it under a group, but it should
be one instance)

4. Edit /etc/raddb/nasspaswd and add:

<ip address of NAS> SNMP community

5. Restart radius

You're done!