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External access to computers behind a firewall or NAT

Configuration

Java Proxy requires TWO computers on the net controled by you - one outside firewall and second behind firewall. Controled by you, means you can install and run applications on these computers. On this diagram such computers are Computer 1 and Computer 2. Second requirement is computer outside firewall must have real IP address. Last requirement is - you must have J2SE 1.4 installed on both computers, you can download it here, and it is highly recommended (until you know how to deal with java application) to have Java Web Start support installed (it is in default J2SE installation, just don't remove this option).

Client application not necessary have to be located on the computer with Connector, all allowed clients can use it as proxy to access services behind firewall. The same situation is for Redirector - it can access services on it's own computer or on another computers.

Configuration on computer outside firewall (Computer 1)

Click here, to run application by Java Web Start. Or download application here and run in from your disk.

Select Connector server mode. Click Next.

There is default value for Server port, you can use it or customize it. If your Firewall/Proxy does not allow connections to custom ports you may try 443 or 563, or ports above 1024 here. Configure Proxies/Forwarders section, you can read about them here. Click Next.

Click Start. Connector is running, once Redirector will be running too, you can start using Java Proxy.

Configuration on computer behind firewall (Computer 2)

Click here, to run application by Java Web Start. Or download application here and run in from your disk.

Select Redirector client mode. Click Next.

Specify hostname or IP of Computer 1 in the Host field and in the Port enter the same number as you entered in Server port for Computer 1.

If you can connect to the Internet only through proxy (check browser configuration if you are not sure), then you have to enter information about it into Advanced Connection section. Once it is done, click Next.

Click Start. Once Computer 2 will connect Computer 1 you will see orange squre in the left lower corner. It means you can start using Java Proxy.