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VDE_OVER_NS(1) FreeBSD General Commands Manual VDE_OVER_NS(1)

vde_over_ns - Steganographic cable over NS protocol for Virtual Distributed Ethernet

vde_over_ns [ -D] [ -c server_address] [ -s vde_plug] [ -i]

A vde_over_ns allows to connect two remote vde_switches through steganographic NS query/response datagrams. e.g.:
dpipe vde_plug /tmp/s1 = vde_over_ns tun.mydomain.vde
binds to udp port 53 and listen for incoming steganographic NS queries (server mode). All the traffic to/from stdout/stdin is redirected to the client via ns responses.
creates a wire between two vde_switches (with sockets /tmp/s1 and /tmp/s2 respectively). This cable looses 10% of the packets in each direction.
The same vde_over_dns server can be created using:
vde_over_ns -s /tmp/s1 tun.mydomain.vde
The syntax is almost identical for the client mode, except that to have a vde_over_ns client connect to that server, the -c server option must be specified.

-s vdeplug
If specified, the vde_over_ns will connect to the local vde socket vdeplug instead pf stdin/stdout, using the libvdeplug library.
Detach console and send the process to background.
The NS server will bind only to the specified ip, instead of any ip. Only valid in server mode (without -c)
-c server_addr
If specified, client mode is enabled. Vde_over_ns will try to send NS requests to server_addr. If not specified, server mode is enabled by default.

Virtual Distributed Ethernet is not related in any way with ("Verband der Elektrotechnik, Elektronik und Informationstechnik" i.e. the German "Association for Electrical, Electronic & Information Technologies").

vde_switch(1), vdeq(1). dpipe(1). unixterm(1).

VDE_OVER_NS is a tool by Daniele Lacamera <>
VDE is a project by Renzo Davoli <>
based on nstx, a steganographic ns client/server software by:
Florian Heinz <>
Julien Oster <>
May 2, 2007 Virtual Distributed Ethernet

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