iodine
Platforms:
FreeBSD,
Linux,
MacOS,
NetBSD,
OpenBSD,
Windows XP
Categories:
Covert Channels,
Network Utilities,
Tunneling
Version: 0.5.2
URL: http://code.kryo.se/iodine
iodine lets you tunnel IPv4 data through a DNS server. This can be usable in different situations where Internet access is firewalled, but DNS queries are allowed.
It needs a TUN/TAP device and one server can handle 16 simultaneous users. The bandwidth is asymmetrical with limited upstream and up to 1 Mbps downstream.