You can restrict access from a specific modem/mobile device, or an access device specified with its IMEI. TekRADIUS will add the 3GPP-IMEISV attribute as a check attribute automatically at the user’s first logon attempt. TekRADIUS will check if users try to log on from the same device successive logon attempts. You need to add Lock-IMEI = Yes as a check attribute to user or group profiles for this function.
Lock- IMEI attribute is an integer type attribute and can exist as check attributes in User or Group profiles.