Network Reset

Disconnect the ISP NIC cable from the VPN Server, U can do it also once updated the DC & VPN servers if possible.

Reboot the ISP modem by disconecting the Power cable for at least 30 sec, once all lights come on back, disconnect the DSL cables/Fibe Network cable, if possible from the wall. Wait at least one minute to reconnect.
Log into the DC server, go to Server Manager

Local Server. Click on the Ethernet link (“192.168.0.120”). That will take you into “Network

Connections” Dialog box. Right click on it > Status – Disable button, wait for 10 seconds Right
click on it > Status – Enable button to enable it. Click Properties button, select …(TCP/IPv4) > Properties, and make sure Primary DSN is 127.0.0.1