Mpd is a netgraph(4) based implementation of the multi-link PPP protocol for FreeBSD. It is designed to be both fast and flexible. It handles configuration and negotiation in user land, while routing all data packets strictly in the kernel. It supports several of the numerous PPP sub-protocols and extensions, such as: Multi-link PPP capability PAP, CHAP, MS-CHAP and EAP authentication PPP compression and encryption IPCP and IPV6CP parameter negotiation Mpd have support for many link types: Serial port modem Point-to-Point Tunnelling Protocol (PPTP) Layer Two Tunnelling Protocol (L2TP) PPP over Ethernet (PPPoE) PPP over TCP PPP over UDP PPP over specified netgraph(4) node Mpd also includes many additional features: IPv4 and IPv6 support RADIUS authentication and accounting NetFlow traffic accounting Network address translation (NAT) Dial-on-demand with idle timeout Multiple active connections running simultaneously Dynamic demand based link management (also known as ``rubber bandwidth'') Powerful chat scripting language for asynchronous serial ports Pre-tested chat scripts for several common modems and ISDN TAs Clean device-type independent design Comprehensive logging Telnet and HTTP control interfaces. WWW: https://sourceforge.net/projects/mpd/