Hi
> > I'm was trying to use x-windows over a telefone line (using ppp). My
> > linux-box using ip-masq for going on the local network. Every services
> > works (telnet, ping ,ftp,xdm .....) but when i wanna start an x-windows
> > session. No x-windows will appear on my screen. (I use exceed on PC).
> > What is happening. Can anybody help me ??
> >
>
> The X clients (like netscape, etc.) need to be able to connect to your
> computer (the X server.) Running X programs on your linux box should be
> ok (so long as the DISPLAY environment variable is set or the -display
> argument is passed to the program.) Running X programs from outside the
> firewall will not work because the connections cannot go back
> through the masquerade. unless...
You are absolutely right.
Let me suggest yet another way of getting X through an IP masquerading
router.
ssh http://www.ssh.fi/sshprotocols2/
It makes a tunnel through the net, the tunnel can be encrypted and
authenticated with strong encrypting techniques, _and_ it's the most
painless way to use X from one machine to another, since it automatically
handles the boring details like DISPLAY.
X in itself has a lot of security problems, by using ssh as the only means
of using X over the network you can switch off most of the more "usefull"
security "feautures" in your X installations.
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