XMPP

VTun – create virtual tunnels over TCP/IP networks

VTun (Virtual TUNnel) is software that lets users create Virtual Tunnels over TCP/IP networks.

It support various tunnel types and provides many useful features including encryption, compression, and traffic shaping.

This is free and open source software.

Key Features

  • Tunnel types:
    • IP tunnel (tun) – supports point-to-point IP tunnel.
    • Ethernet tunnel (ether) – supports all protocols that work over Ethernet: IP,IPX,Appletalk,Bridge,…
    • Serial tunnel (tty) – supports all protocols that work over serial lines: PPP,SLIP,…
    • Pipe tunnel (pipe) – supports all programs that works over Unix pipes.
  • Protocols:
    • VTun protocol over TCP. It allows you to establish tunnels behind firewalls.
    • VTun protocol over UDP – fast and efficient protocol with small tunneling overhead.
  • Compression:
    • Deflate (zlib) – very efficient compression. Supported for TCP only.
    • LZO (lzo) – super fast compression. Supported for UDP and TCP.
  • Encryption:
    • Challenge based authentication – no clear text passwords.
    • BlowFish 128 bits key – fast efficient encryption with 128 bits MD5 hash keys.
  • Traffic Shaping Platform Independent Traffic Shaper – allows you to limit inbound and outbound speed of the tunnels.

Website: vtun.sourceforge.net
Support:
Developer: Maxim Krasnyansky
License: GNU General Public License v2.0

VTun is written in C. Learn C with our recommended free books and free tutorials.


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Read our verdict in the software roundup.


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