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libnet-proxy-perl - Framework for proxying network connections in many ways…  more info»


CONNECT-TUNNEL(1pUser Contributed Perl DocumentatiCONNECT-TUNNEL(1p)

       connect-tunnel - Create CONNECT tunnels through HTTP proxies

       connect-tunnel [ -Lv ] [ -A user:pass ] [ -P proxy:port ]
                      [ -C controlport ] [ -T port:host:hostport ]

       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

       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

       -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

       To connect to a SSH server running on "", on
       port 443, through the proxy "", running on
       port 8080, use the following command:

           connect-tunnel -P -T

       And now point your favorite ssh client to the machine running

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

           connect-tunnel -U "Mozilla/4.03 [en] (X11; I; Linux 2.1.89 i586)"
                          -P -T

       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 -T
                          -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 -T
                       -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 -A book:s3kr3t -L

       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. ";-)"

       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.

       Philippe "BooK" Bruhat, "<>".

       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.

       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:

       ยท   HTTP Tunnels Through Proxies, Daniel Alman

           Available at SANS InfoSec Reading Room: Covert Channels

           Direct link:

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

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

perl v5.10.1                 2009-10-18           CONNECT-TUNNEL(1p)
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