Support - No-IP Support Center
Routers and Firewall Appliances Support Guides 
Port Forwarding on the Linksys BEFSR41 Broadband Router
In order to open and forward ports on your Linksys BEFSR41 router, simply perform the following steps in order.
- Logon to your router
- Go to the Advanced menu
- Name your rule
- Select the range of ports to forward
- Select the Protocol Type
- Specify the internal IP address of the target machine
- Enable the new rule
- Apply the changes
Step 1: Logon to your router
Open you web browser and type the IP Address of the router in the address window (192.168.1.1 is the default IP of Linksys routers).
Enter username (blank by default) and your password (admin). Note: If you have changed the default password then use the value
you have changed it to.
Step 2: Click on the orange Advanced button on top and then click Forwarding.
Step 3: Create name for your new forwarding rule
Step 4: Select the range of ports you want to forward
This information depends on the needs of the services you're making available over the Internet. In this case we're
demonstrating with the port used by Windows Remote Desktop Connection (3389).
Step 5: Select the correct Protocol Type - either TCP, UDP, or both. If you are not sure, choose both.
Step 6: Enter the IP address of the target machine on your network that the traffic gets forwarded to.
Step 7: Enable the port forwarding rule you just created.
Step 8: Click the Apply button to save the rule.
There are a couple of gotchas you should be aware of:
- Because most routers use NAT (Network Address Translation), you can only open a specific port or ports to one computer at a time. For example: If you have 2 web servers on your network, you cannot open port 80 to both computers. You will need to configure 1 of the web servers to use a different port (8080 for example). Now you can open port 80 to the first computer and then open port 8080 to the other computer.
- If your application needs multiple ports open, you can make multiple entries here or alternately have a look at the DMZ option.
- USE CAUTION if you intend to experiment with the DMZ option as it will essentially expose all the ports on one computer to inbound Internet traffic.
Remember that opening and forwarding ports on a router effectively exposes your internal network to the Internet. You should only open the ports that are needed to get your applications to work and always make sure your computers have all the latest patches and security updates applied in order to minimize the possibilty of someone compromising your network.
Related Articles
Getting Started?
- We recommend you start with our Getting Started Guide which will walk you through all the basic steps to getting going with our service.
Still Need Help?
- Having trouble finding the answer you are looking for in our online support documents? First try our basic trouble shooting guide. If you still can't find the answer to your question feel free to open a Support Request or Contact Us.
Report Abuse
- If you believe a No-IP member's actions violate our Terms of Service, please inform us immediately at abuse@no-ip.com