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Risky101Flag for United States of America

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Accessing a RS232 port of a computer in another country

Hi,

I wish to access the RS232 port of a computer in another country, via TCP/IP.

I am sitting here in my office, with a computer connected to an ADSL router. My IP address is 192.168.0.x (local IP address).

My client is sitting in their office, in another country, with a computer with COM1. Their computer is connected to an ADSL router. Their IP address is 192.168.0.x (local IP address).

My question is: how do I connect to COM1 on their computer, in another country? I can already chat with my client via ICQ or MSN, so I'm sure that this is possible.

Latency is not an issue, all I'm doing is typing commands into their remote embedded Linux box, which is accessed via COM1 on their computer.

UPDATE: There is a program called TCP/Com that acts as a telnet server. If my local IP address is 192.168.0.30, connecting to port 1000 gives you access to that RS232 port (COM1). Now the problem becomes "how can I telnet into a computer behind a firewall in another computer?"
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artokallio

The network 192.168.0.0 is reserved for local addresses, it does not route.
So you would need a gateway computer which has a port somehow redirected to the other network,
which has the same kind of arrangement for its local network.
Inherently this is very unsafe. You should be using VPN or something other secured for such a purpose.

/R2
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ASKER

Hi,

We're not worried about safety - just some solution, at any cost. There is no critical information being carried.

Any other ideas about how to get at a computer behind an ADSL router and a firewall, as described above?
ASKER CERTIFIED SOLUTION
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artokallio

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Hi,

We managed to find a solution - it was difficult, but it works perfectly. Thanks for the comments.