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CONNECT-TUNNEL(1)     User Contributed Perl Documentation    CONNECT-TUNNEL(1)

NAME
       connect-tunnel -	Create CONNECT tunnels through HTTP proxies

SYNOPSIS
       connect-tunnel [A -LvA ]	[A -AA user:passA ] [A -PA proxy:portA ]
		      [A -CA controlportA ] [A -TA port:host:hostportA ]

DESCRIPTION
       connect-tunnel sets up tunneled connections to external hosts by
       redirecting connections to local	ports towards thoses hosts/ports
       through a HTTP proxy.

       connect-tunnel makes use	of the HTTP "CONNECT" method to	ask the	proxy
       to create a tunnel to an	outside	server.	Be aware that some proxies are
       set up to deny outside tunnels (either to ports other than 443 or
       outside a specified set of outside hosts).

OPTIONS
       The program follows the usual GNU command line syntax, with long
       options starting	with two dashes.

       -A, --proxy-authentication user:password
	   Proxy authentication	information.

	   Please note that all	the authentication schemes supported by
	   "LWP::UserAgent" are	supported (we use an "LWP::UserAgent"
	   internally to contact the proxy).

       -C, --control-port controlport
	   The port to which one can connect to	issue control commands to
	   connect-tunnel.

	   See "CONTROL	CONNECTIONS" for more details about the	available
	   commands.

       -L, --local-only
	   Create the tunnels so that they will	only listen on "localhost".
	   Thus, only connections originating from the machine that runs
	   connect-tunnel will be accepted.

	   That	was the	default	behaviour in connect-tunnel version 0.02.

       -P, --proxy proxy[:port]
	   The proxy is	required to connect the	tunnels.  If no	port is	given,
	   8080	is used	by default.

	   See also "ENVIRONMENT VARIABLES".

       -T, --tunnel port:host:hostport
	   Specifies that the given port on the	local host is to be forwarded
	   to the given	host and hostport on the remote	side. This works by
	   allocating a	socket to listen to port on the	local side, and
	   whenever a connection is made to this port, connect-tunnel forwards
	   it to the proxy (with the credentials, if required),	which in turn
	   forwards it to the final destination.

	   Note	that this does not imply the use of any	cryptographic system
	   (SSL	or any other). This is a simple	TCP redirection. The security
	   if any, is the one provided by the protocol used to connect to the
	   destination through connect-tunnel.

	   On Unix systems, only root can forward privileged ports.

	   Note	that you can setup tunnels to multiple destinations, by	using
	   the --tunnel	option several times.

       -U, --user-agent	string
	   Specify User-Agent value to send in HTTP requests.  The default is
	   to send "connect-tunnel/version".

       -v, --verbose
	   Verbose output.

	   This	option can be used several times for more verbose output.

EXAMPLES
       To connect to a SSH server running on "ssh.example.com",	on port	443,
       through the proxy "proxy.company.com", running on port 8080, use	the
       following command:

	   connect-tunnel -P proxy.company.com:8080 -T 22:ssh.example.com:443

       And now point your favorite ssh client to the machine running connect-
       tunnel.

       You can also emulate a "standard" user-agent:

	   connect-tunnel -U "Mozilla/4.03 [en]	(X11; I; Linux 2.1.89 i586)"
			  -P proxy.company.com:8080 -T 22:ssh.example.com:443

       connect-tunnel can easily use your proxy	credentials to connect
       outside:

	   connect-tunnel -U "Mozilla/4.03 [en]	(X11; I; Linux 2.1.89 i586)"
			  -P proxy.company.com:8080 -T 22:ssh.example.com:443
			  -A book:s3kr3t

       But if you don't	want anybody else to connect to	your tunnels and
       through the proxy with your credentials,	use the	--local-only option:

	connect-tunnel -U "Mozilla/4.03	[en] (X11; I; Linux 2.1.89 i586)"
		       -P proxy.company.com:8080 -T 22:ssh.example.com:443
		       -A book:s3kr3t -L

       If you have several destinations, there is no need to run several
       instances of connect-tunnel:

	connect-tunnel -U "Mozilla/4.03	[en] (X11; I; Linux 2.1.89 i586)"
		       -P proxy.company.com:8080 -A book:s3kr3t	-L
		       -T 22:ssh.example.com:443
		       -T 222:ssh2.example.com:443

       But naturally, you will need to correctly set up	the ports in your
       clients.

       Mmm, such a long	command	line would perfectly fit in an alias or	a .BAT
       file. ";-)"

ENVIRONMENT VARIABLES
       The environment variable	"HTTP_PROXY" can be used to provide a proxy
       definition.

       The environment variable	is overriden by	the --proxy option, if passed
       to connect-tunnel.

AUTHOR
       Philippe	"BooK" Bruhat, "<book@cpan.org>".

       I seem to have re-invented a well-known wheel with that script, but at
       least, I	hope I have added a few	interesting options to it.

SCRIPT HISTORY
       The first version of the	script was a quick hack	that let me go through
       a corporate proxy.

       Version 0.02 and	version	0.03 were released on CPAN in 2003.

       Version 0.04 sits half-finished in a CVS	repository at home: I couldn't
       decypher	the spaghetti of my data structures any	more. ":-("

       Version 0.05 (and higher) are based on "Net::Proxy", and	included with
       the "Net::Proxy"	distribution.

       Even though it's	not rocket science, connect-tunnel has been cited in
       at least	one academic works:

       o   HTTP	Tunnels	Through	Proxies, Daniel	Alman

	   Available at	SANS InfoSec Reading Room: Covert Channels
	   <http://www.sans.org/rr/whitepapers/covert/>

	   Direct link:	<http://www.sans.org/rr/whitepapers/covert/1202.php>

COPYRIGHT
       Copyright 2003-2007, Philippe Bruhat. All rights	reserved.

LICENSE
       This module is free software; you can redistribute it or	modify it
       under the same terms as Perl itself.

perl v5.24.1			  2014-11-02		     CONNECT-TUNNEL(1)

NAME | SYNOPSIS | DESCRIPTION | OPTIONS | EXAMPLES | ENVIRONMENT VARIABLES | AUTHOR | SCRIPT HISTORY | COPYRIGHT | LICENSE

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