openssh unix dev - May 2002 - X11 forwarding and LBX

So I'm working from home today, and for the first time I've tried
running Evolution over a forwarded X11 connection. Even though work has
a T1 and I have 640k at home, and ssh is compressing, it's ... rather
slow.

So I fire off lbxproxy and try to run an xterm to see if it works. No
dice, authentication denied.

Does anybody have any experience with this? Is it possible to run
lbxproxy and ssh X11 forwarding simultaneously? If so, does it result in
any noticable performance gains over basic ssh compressing?

-- 
John Hardin                                   <johnh at aproposretail.com>
Internal Systems Administrator                    voice: (425) 672-1304
Apropos Retail Management Systems, Inc.             fax: (425) 672-0192
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John Hardin wrote:
> So I fire off lbxproxy and try to run an xterm to see if it works. No
> dice, authentication denied.
> 
> Does anybody have any experience with this? Is it possible to run
> lbxproxy and ssh X11 forwarding simultaneously? If so, does it result in
> any noticable performance gains over basic ssh compressing?
I've used it with a network management product over a WAN link. To open
a map with compressing ssh took ~12sec. With LBX, it took ~9sec, but to
re-open a map that had previously been opened took <1sec.

The script I used to sort out xauth stuff is attached. The caveats are:
you need to source it (ie ". ./lbx") and various versions of LBX
behave
differently so you may need to adjust it to local conditions. I also
found that some versions of LBX running on Solaris wouldn't bind()
unless they ran as root, although I never figured out why.

		-Daz.
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#!/bin/sh

LIBPATH=/usr/X11R6.4/lib:$LIBPATH
export LIBPATH

PATH=/usr/openwin/bin:$PATH
export PATH

if [ "$DISPLAY" = "" ]
then
        echo "No DISPLAY variable set, LBX cannot start."
        exit 1
fi

echo Starting Low Bandwidth X proxy.
>$HOME/.lbxproxy
lbxproxy :10 2> $HOME/.lbxproxy &

until egrep "Using port number .[0-9]*." $HOME/.lbxproxy
do
  sleep 1
done

lbxport=`awk '/Using port number/{print $4}' $HOME/.lbxproxy | tr -d
"'"`

LBXDISPLAY="`hostname`:$lbxport.0"

authtype=`xauth list $DISPLAY | awk '{print $2}'`
authkey=`xauth list $DISPLAY | awk '{print $3}'`

if [ ! -z "$authtype" ]
then
  echo "Adding Xauthority for lbxproxy"
  xauth add $LBXDISPLAY $authtype $authkey
else
  echo "No Xauthority found for display $DISPLAY."
  echo "You may have authorization problems (especially via SSH!)"
fi

echo Standard X11 display: $DISPLAY
echo LBX proxy display: $LBXDISPLAY

ps -eaf |grep [l]bxproxy

DISPLAY=$LBXDISPLAY
export DISPLAY