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Old 02-03-2004, 03:44 AM   #1
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Registered: Nov 2003
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linking to an internal ip via external ip


I have an ADSL line to a linux box (RH9). If I want to connect remotely to a database on that box I use the connection string - this works fine.

But if the database is on another linux box on the LAN - what syntax should I use to point to the database?

I have tried

This does not work.

If I am on the LAN I can connect to my database via


Old 02-03-2004, 04:02 AM   #2
Registered: Feb 2004
Location: 50N 3E
Distribution: Gentoo
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You'll have to know what port(s) are used to access that db.
Eg: for HTTP transfers that port would be TCP/80.

Once you know that, you'll have to configure your gateway box (the one connected to both, LAN and internet) to forward all packets for port xxx to that specific LAN client.

try 'man iptables'
the syntax should be something like
iptables -A prerouting -p tcp --dport 80 -j DNAT
and maybe:
iptables -A FORWARD -p tcp --dport -j ACCEPT
Note: in this way you can only have 1 such db-server. If you need more, you'll have to ask some more IP's with your ISP.

Last edited by nielchiano; 02-03-2004 at 04:04 AM.


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