Hi My problem : Error 734: The PPP link control protocol was terminated." appeared on my PC every 30 minutes. After that I have to stop the radiusd than deleting"db.ippool's" and "db.ipindex's" files then restart the radiusd. After doing that it works 30 minutes more than same i have to do the same.... I am tring to solve this problem more than 2 weeks but unfortunately i couldnt. I would be very happy if someone helps me. Below you can see my ippool configuration. ippool 128 { range-start = 212.108.xxx.2 range-stop = 212.108.yyy.254 netmask = 255.255.255.0 cache-size = 3200 session-db = ${raddbdir}/db.ippool-128 ip-index = ${raddbdir}/db.ipindex-128 override = no maximum-timeout = } ippool 256 { range-start = 212.108.xxx.1 range-stop = 212.108.yyy.254 netmask = 255.255.255.0 cache-size = 3200 session-db = ${raddbdir}/db.ippool-256 ip-index = ${raddbdir}/db.ipindex-256 override = no maximum-timeout = 0 } ippool 512 { range-start = 212.108.xxx.1 range-stop = 212.108.yyy.254 netmask = 255.255.255.0 cache-size = 3200 session-db = ${raddbdir}/db.ippool-512 ip-index = ${raddbdir}/db.ipindex-512 override = no maximum-timeout = 0 } ippool 1024 { range-start = 212.108.xxx.1 range-stop = 212.108.yyy.254 netmask = 255.255.255.0 cache-size = 3200 session-db = ${raddbdir}/db.ippool-1024 ip-index = ${raddbdir}/db.ipindex-1024 override = no maximum-timeout = 0 } ippool 2048 { range-start = 212.108.xxx.1 range-stop = 212.108.yyy.254 netmask = 255.255.255.0" cache-size = 3200 session-db = ${raddbdir}/db.ippool-2048 ip-index = ${raddbdir}/db.ipindex-2048 override = no maximum-timeout = 0 } accounting { 128 256 512 1024 post-auth { 128 256 512 1024 2048 Thanks Emre.