PPTP

The Point-to-Point Tunneling Protocol (PPTP) is Article description::a method for creating virtual private networks. PPTP allows the Point-to-Point Protocol (PPP) to be tunneled through an IP network on TCP port 1723. PPTP has many security vulnerabilities and is considered obsolete.

External resources

 * https://wiki.archlinux.org/index.php/PPTP_VPN_client_setup_with_pptpclient
 * https://wiki.archlinux.org/index.php/PPTP_Server