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Using the program to transmit data via the Internet

You can configure TCP Splitter to transmit data via the Internet. To enable data transmission, you might need to change the network settings on your computer and/or the router in your network.


Most computers are not connected directly to the Internet, so other computers may be unable to connect directly to your computer via the Internet and transmit data.


How to check whether your computer is connected directly to the Internet?


If your network address belongs to one of the ranges listed below, it means that your computer is in a local private network and is connected to the Internet via a router: - - -


For more details, read this article: http://en.wikipedia.org/wiki/Private_network


Your public IP address on the Internet may be entirely different. You can check it via Google:




To configure a connection for TCP Splitter operating as a client, you only need to now the public IP address of the other computer on the Internet.


To configure a connection for TCP Splitter operating as a server, you need to configure port forwarding on your router. Port forwarding on the router lets you redirect all data, coming to the specified public IP address and port, to the local IP address.


For example: Your address in the local network is Your public IP address is All clients will be sending data only to your public IP address. The router will forward data to, implicitly binding your local IP address to your public IP address.


Note: For TCP Splitter to operate as a server, it must run on a computer with a static local IP address. That’s because the router is configured to forward data to a specific address only.


How to configure the router to redirect data?


1. Open your router’s control panel. Usually you configure the router via a web browser. Try entering in the address bar.

2. On the control panel, look for “Port Forwarding” or “Virtual Server” settings.

3. Add a data forwarding rule.



 Local port: 10232

 Local IP address:

 Remote port: 10232


4. Save the changes, and reboot the router.


For more details about configuring port forwarding for any router model of any vendor, visit this website: http://www.portforward.com/. If your router model is not listed, try reading instructions for similar models.


Dynamic public IP address


Having a dynamic public IP address may not let TCP Splitter operate as a server. Each time you connect to the Internet, your public IP address may change, so a remote computer will be unable to connect to a predefined IP address. If you don’t know what type of IP address you have, ask your Internet service provider.


Dynamic DNS services can solve this problem by binding your dynamic IP address to your permanent domain name. For example, you can use these dynamic DNS services:





If you register at such a website, you will get a permanent domain name. If you install a special software from the DNS service provider on your computer, you can automatically update the binding of your dynamic IP address to the domain name.


Many state-of-the-art routers have built-in support for dynamic DNS services.




Another thing that may hinder the transmission of data via the Internet is the firewall. The firewall’s purpose is to prevent any unauthorized transmission of data. All modern operating systems have a built-in firewall. All-in-one antiviral bundles include a firewall too.


When TCP Splitter attempts to use any TCP port for the first time, the Windows Firewall will show a warning. To let TCP Splitter operate properly, you must allow it to connect to the network. You can see an example of firewall warning in Figure 1.



Figure 1: Firewall warning


If you use a third-party firewall, you may also need to configure it to let TCP Splitter connect to the network. Please refer to your firewall’s manual, and add TCP Splitter to the list of exceptions.