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LEC - Linux Ethernet Console

 *   Copyright (C) 2009 Alejandro Liu Ly
 *
 *   This is free software; you can redistribute it and/or modify
 *   it under the terms of the GNU General Public License as
 *   published by the Free Software Foundation; either version 2 of 
 *   the License, or (at your option) any later version.
 *
 *   THis is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *   GNU General Public License for more details.
 *
 *   You should have received a copy of the GNU General Public
 *   License along with this program.  If not, see 
 *   <http://www.gnu.org/licenses/>
 *
 *   This software makes use of the uthash library.  See
 *   LICENSE.uthash for the uthash library specific license
 *   conditions

Original CEC client coyright:

/* Copyright Coraid, Inc. 2006.  All Rights Reserved. */

NCA Copyright

Copyright (c) 2002-2004 James McKenzie <james@fishsoup.dhs.org>,
          2004      Julian T. J. Midgley <jtjm@xenoclast.org>

nca is distributed under the terms of a 2-part BSD licence,


The Coraid Ethernet Console (cec) is a lightweight protocol for connecting two endpoints using raw ethernet frames. The communication is not secure, but it is not routed.

Cec is also the name of the client used to connect to cec servers. Coraid's Cec client will run on linux, and bsd flavors supporting bpf (including OSX).

This software implements a CEC client and a CEC server. It is mostly compatible with the Coraid CEC client implementation.

It can be used to implement a very light weight network console which does not need a file system nor full IP networking.

Included are the following:

  • cecd - The CEC server
  • cec - The cec client
  • nca - Used to access the physical Linux console

This software makes use of code from the following projects:

  • cec: Coraid Ethernet Console (client) AoE Tools
  • NCA: Network Console on Acid NCA

tcpdump options

tcpdump -i eth0 -n -nn ether proto 0xbcbc

Source: README.md, updated 2013-10-22