How to configure firewall for X11

I have a system with a 192.168.. ip going through a
liunx firewall to a remote unix system. When I telnet
to this remote system, I would like to run X programs
but do not know how to configure the 'DISPLAY' settings.
How can I get my NAT'ed machine to receive X11?
shippy012000Asked:
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biardCommented:
Listening.  (I have interest in this ? as well)
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j2Commented:
you can't. Unless you can forward the port (6000 + display number) directly to the station behind the NAT it wont work. The X11 protocol puts the source IP in the data-part of the packages, aswell as in the normal IP-headers.

Using SSH to tunnel should work for single port forwarding tho.
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shippy012000Author Commented:
so..... can you tell me what I would have
to do in ipchains to get this port to forward?

If gateway machine ls 128.1.1.1 and
NAT machine is 192.168.1.1 and is using
display 0.0, what would a chain look like?

TIA

Ron
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j2Commented:
ipchains will not work. Ipchains cannot rewrite the packages properly. Ipchains only reqrites the adress part of the datagram, not the data part, which is needed.
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shippy012000Author Commented:
Rats.

I thought that I would be able to forward
any packet to 128.1.1.1:6000 to 192.168.1.1:6000 and it would work.

What do you recommend then to do this
forwarding?
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j2Commented:
Friend says that "ipmasqadm" would do the trick. Personally i stick to SSH tunnels :)
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