How to Port Forward in a Siemens 4200 DSL Modem
Firewalls are a type of security measure that protect your computer from attacks over your network by blocking all traffic that has not been specifically allowed through it. Port forwarding is how you configure a firewall to allow specific types of network traffic through the firewall unrestricted. If you have a firewall set up on your Siemens 4200 DSL modem, you need to configure the firewall manually to allow newly installed programs access to your Internet connection.
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Instructions
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Open a Web browser and enter "10.0.0.138" into the address bar.
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Enter the user name and password for a user account on the modem with administrative privileges. The default administrator's account uses "admin" for both the user name and password.
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Click "Setup" in the panel on the left side of the window, then click "Port Forwarding" in the list underneath it.
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Open the "Select protocol" drop-down menu and choose the type of port you are forwarding. The options are "TCP" and "UDP." Most applications use "TCP."
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Enter the port number you want to forward in the top "TCP/UDP port(s)" box. If you want to forward a range of ports, enter the lower number in the top box and the higher number in the bottom box.
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Click "Redirect select protocol/service to IP address."
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Enter the IP address of the computer that will be running the program you need to forward the port for. To check a computer's IP address, open "Control Panel" from the Start Menu, type "adapter" into the search box near the top-right corner of the window, then click the "View network connections" link. Double-click on the network adapter your computer is using, then click the "Details" button. The IP address is listed in the "IPv4 Address" entry.
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Click "Apply" to forward the ports.
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Tips & Warnings
Different programs use different ports for their network traffic. Check the program documentation to find which port a specific program uses, or visit a port directory online.
References
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