The Hosts file is a static name-resolution table that overrides the system's DNS server. After we update the host file, when the application will try to contact the activation server it will be redirected to the loop-back address 127.0.0.1 and therefore will be blocked. By default, the /etc/hosts file is relatively simple. 73 - Configuration Guide: Avoiding IP Fragmentation in GRE Tunnel Deployments FD3. Technical Tip: Troubleshooting PPTP VPN users experiencing disconnections on the Forti. Technical Note: Setting up Point- to- Point Tunneling Protocol (PPTP) VPN FD3. Hosts File Entries To Block Adobe Activation Script Fonts.