Synergy Across SBS | ISA Firewall Port Forwarding

I have this topology:

ISP -> Modem/Router -> NIC1 -> SBS 2003 with ISA -> NIC2 -> Switch ->
Internal Client with XP Pro

From the Modem/Router I also have an external "client" where I have a
tri-boot computer with a couple distros of Linux and XP. For reasons
that I'll exclude from this article, I'd like to keep this box outside
the SBS network.

I would like to run Synergy (a program that allows me to share the
mouse and keyboard between multiple computer/monitors [not a KVM])
across these computers.

I can successfully run Synergy when I setup the Linux box as the server
and the Internal XP Pro client as the client... but alas I would really
like the XP Pro box as the server because I also use the mouse/keyboard
for a KVM inside the SBS network. Unfortunately I cannot get the client
to connect to the server this way. I published the IP address of the
XP Pro server with the corresponding port within ISA but to no avail.
I continue to get the "failed to connect to server: Timed out"
message... which makes me think it is a firewall issue. I can ping the
external Linux box from the internal XP Pro box, but not vica versa...
but this I understand since ICMP requests are denied - but if I
published the server and created a rule for the port I need ICMP
request shouldn't matter right?

I've run out of ideas... I know there are other solutions by
re-orientating my setup that would work, but does anyone have any ideas
on how to make THIS setup work? Thanks!

.

Relevant Pages

  • Re: Synergy Across SBS | ISA Firewall Port Forwarding
    ... able to publish a server within ISA then? ... Internal Client with XP Pro ... the SBS network. ...
    (microsoft.public.windows.server.sbs)
  • Re: Synergy Across SBS | ISA Firewall Port Forwarding
    ... but is there no way for a client within the ... ISA could do simple port forwarding for external networks, ... > client/Synergy Server) within ISA? ... >> Internal Client with XP Pro ...
    (microsoft.public.windows.server.sbs)
  • Re: Thin Client networking
    ... > looking for a perspective from the embedded users crowd as well, ... Strange choice for the server machine OS. ... You are probably aware of the limitation on number of network connections built in XP Pro. ... XP Pro or XPe client side? ...
    (microsoft.public.windowsxp.embedded)
  • Re: VPN tunnel with XP Home on remote end cant connect to server in App Mode
    ... I'm running Win2000 Pro on the servers. ... The only thing I can think of is that the machines that have connected ... via a VPN client rather than a tunnel prior to this. ... MCSE, CCEA, Microsoft MVP - Terminal Server ...
    (microsoft.public.win2000.termserv.clients)
  • Re: IIS User Limit for XP Pro ?
    ... XP Pro allows 10 concurrent connections to the computer. ... take 2 connections every time they connect to your server. ... I had thought that the MS Client operating systems usually ...
    (microsoft.public.windowsxp.general)