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xforward(local)						       xforward(local)

NAME
       xforward	- provide user-level X forwarding service

SYNOPSIS
       xforward	[options]

OVERVIEW
       xforward	provides a user-level X11 forwarding service which can be use-
       ful if there are	IP network  topologies	which  provide	non-transitive
       routing (e.g. routers which implement policy packet screening).

OPTIONS
       -display	display

	      Specifies	 the destination display where the user	wants applica-
	      tions to appear.	Without	this argument, xforward	will  use  the
	      DISPLAY environment variable.

       -allow allowed-host1 [allowed-host2 ... allowed-host16]

	      Only connections from allowed-hosts are permitted.  At least one
	      allowed-host must	be specified, and at most sixteen are allowed.

DESCRIPTION
       xforward	will choose an unused port for the local display,  and	listen
       for  connections	 on the	local host at that port.  xforward informs the
       user which port to use as the local display, when xforward is first in-
       voked.	When  it  receives a connection, it will create	a confirmation
       pop-up on the destination.  If the user	confirms  the  connection  re-
       quest,  it will create a	separate socket	and connect it to the destina-
       tion, and then commence data piping between the two connections.	 xfor-
       ward can	handle multiple	simultaneous connections.

       If  there is no activity	on a connection	for 90 minutes,	the connection
       is closed. If the X server at the destination does not have access con-
       trol enabled, then xforward will	report an error.

       If  a  connection is closed by either end, any buffered data is drained
       to its destination before xforward will close the corresponding	socket
       on the other end.

SEE ALSO
       socket(2), connect(2), listen(2), accept(2), bind(2), select(2)

BUGS
       Out-of-band data	is ignored/thrown away.

       If the initial connection to the	destination fails for some reason, the
       client who connected to the local-display will get an open and  immedi-
       ately  closed  TCP connection, which may	cause indigestion to some pro-
       grams which expect some sort of server response or an error code	 indi-
       cating failure to connect.

AUTHORS
       John Kohl, MIT Project Athena and Digital Equipment Corporation
       Modifications  for  X  by Win Treese and	Alec Wolman, Digital Equipment
       Corporation

DISTRIBUTION
       The file	NOTICE in the xforward distribution specifies  the  terms  for
       distributing xforward.  The current version of xforward can be found by
       anonymous FTP from crl.dec.com:/pub/DEC/xforward.tar.Z.

							       xforward(local)

NAME | SYNOPSIS | OVERVIEW | OPTIONS | DESCRIPTION | SEE ALSO | BUGS | AUTHORS | DISTRIBUTION

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