PPTP VPN uses protocol GRE on two way, both inbound and outbound. Setting up the firewall to allow PPTP VPN dialup client (e.g. Ubuntu’s NetworkManager) to use protocol GRE is just a few steps in adding rules and interfaces. This post is based on the previous post “How to set up Shorewall firewall (alternate to [...]
Tag Archives: IPTables
Linux – How to set up Shorewall firewall (alternate to FireStarter)
There are a few option of firewall interface available on Linux for iptables, both GUI (Graphical User Interface) and CLI (Command Line Interface). FireStarter user interface on GUI is easy to use and configure. The only problem is it does not work properly with PPTP VPN dialup, it blocks protocol GRE. It does provide a [...]
