VPND is a software that offers a Virtual Private Network Daemon with secure encryption of TCP/IP. It helps to provide secure communication over the internet by creating a private network between two devices.
The software is not intended to replace secured communication software like ssh or tunneling facilities of the operating system. It is created to provide secure network interconnection across potentially insecure channels. vpnd acquires a pseudo terminal and attaches a SLIP line discipline to it, which gives it its network interface, a SLIP interface named slx, where x is a number. All IP packets sent to this interface are read as a datastream by vpnd and sent through a TCP connection or over a serial line to its peer vpnd, where it gets decrypted and written to the pseudo terminal. The datastream read by vpnd is encrypted, ensuring secure communication.
The software tunnels network traffic between two systems even as it is a user-level daemon. In this release, there were various additions, including a fixed minor bug in generic whitening code, fixing porting to x86_64, ppp mru setup on Linux, adding a 'packetize' option for slip/ppp interoperability, and rtp header compression (SIP VoIP). Additionally, a 'smallrtp' option has been added for reduced bandwidth requirements in 'packetize' mode.
In conclusion, vpnd is a powerful daemon that encrypts all data transfer in a network-level connection. It can provide a secure network interconnection where legal restrictions are observed. The various options and new fixes make it more efficient and functional, providing better security for network interconnections.
Version 1.1.2: N/A