Hi Nikos, My ocserv server is running on a Amazon EC2 instance, as you may know EC2 instances have 2 kind of IP address assigned, private IP and public IP. Commands executed from inside the OS such as ifconfig just return the private IP, on the other hand when you communicate with the internet, the public IP will be used. The NAS-IP-Address info of radius account data received from ocserv is always the private IP, but this NAS-IP-Address sending from other VPN services such as PPTP or L2TP is always the public IP. Just noticed that you are making some improvement on radius accounting, it would be great if you can also make ocserv sending public IP to radius too. Regards, Di