Re: Doubt about DNAT

["Rodrigo Leme de Mello" <rodrigo@idg.com.br>]

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Hi Stewart,

Yeap! I have and my SQL Server is set with the default configuration, that
put it to listen on 1433.
I've also did a port scan to check if the port is open and it is.

Thanks for youe help

Rodrigo

----- Original Message -----
From: Stewart Thompson
To: Rodrigo Leme de Mello ; netfilter@lists.samba.org
Sent: Tuesday, September 10, 2002 5:27 PM
Subject: RE: Doubt about DNAT


Hi Rodrigo:



            Do you have a Forward rule to match the Prerouting rule?

Is your SQL server on the Internal Net expecting connections on

Port 1433?



Stu...





-----Original Message-----
From: netfilter-admin@lists.netfilter.org
[mailto:netfilter-admin@lists.netfilter.org]On Behalf Of Rodrigo Leme de
Mello
Sent: September 10, 2002 7:17 AM
To: netfilter@lists.samba.org
Subject: Doubt about DNAT



Hi all,



I am in trouble to do a rule. Anybody can help me?



I want to redirect all traffic from a specific valid ip and specific
destination port to a machine located inside a LAN.



This rule is to access SQL Server that is located inside a LAN and i have a
valid ip address in a linux machine with iptables.



I've tried the following:



Lan IP with SQL Server: 192.168.0.10

Valid IP with iptables: 200.221.98.123

Valid IP that will acess SQL Server. 200.206.123.112



This rule i've put in the machine 200.221.98.123



iptables -t nat -A PREROUTING -p tcp -s 200.206.123.112 --dport 1433 -j
DNAT --to 192.168.0.10



And now i configure my SQL Server to connect to 200.221.98.123 but i still
can't connect. Dou you have any idea why it is not working?



The ip's i've mentioned are just for example.



Thanks a lot



Rodrigo














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