I'm here because after a good time searching how to limit the simultaneous connections of a user with FreeRADIUS I haven't achieved it...
My intention is that each user connects only once and that when they try to access again with that account, if it is already in use, it does not allow them to connect to the network, but I do not find how to do it??
If you are authenticating your users from a database, just insert this to the radreply table for each user:
username = "ABC" i.e the username of the user
attribute = "Port-Limit" i.e Radius attribute for limiting simultaneous connections
op = ":=" i.e The radius operator
value = "1" i.e The number of simultaneous connections you want to allow for the user
See how it looks on my database
You can read more about Port-Limit here
You can read more about Radius attributes here too
Port-Limit Attribute: This Attribute sets the maximum number of ports to be provided to the user by the NAS. The value you set for this attribute will be sent by the server to the client in the Access-Accept packet
