Re: [CentOS] redirecting web requests from localhost

On Wed, 2013-08-28 at 21:49 +0200, Miguel González wrote:

Dear all,

I´m testing a server and try to simulate a server in production. We 

have a SSL certificate and I have configured the test server with the same servername as it is in production. To access it, I change the hosts file in my laptop to reach the test server.

However, the Java application running in the server tries to access 

some local web content. I have changed the hosts file and some applications (ping, wget) they get the local IP address. However nslookup and maybe our Java application (I didn´t have the programmer available to debug it) are getting the production server IP.

So, how can I redirect for instance 443 traffic to a specific IP to 

the local IP address of the local server? I have tried this:

 iptables -t nat -A PREROUTING -d XXX.XXX.XXX.XXX -p tcp --dport 80 

-j DNAT --to YYY.YYY.YYY.YYY

XXX.XXX.XXX.XXX - IP of production server

YYY.YYY.YYY.YYY - local IP of the test server

Thanks

Miguel

You have the prerouting but you have to forward it as well. This allows a connection on the Internet to make a connection to a internal machine on my local network. Router machine's local network ip 10.0.0.1 on eth1. 10.0.0.5 internal machine.

iptables -A FORWARD -p tcp -i ppp0 -o eth1 -d 10.0.0.5 --dport 1234 -j ACCEPT iptables -t nat -A PREROUTING -p tcp -i ppp0 --dport 1234 -j DNAT --to-destination 10.0.0.5:1234

ip and ports changed to protect the guilty :)

Gary.