If you don't know what Port Forwarding is yet, you might want to start by reading our What is Port Forwarding guide.
You might also be interested in our huge collection of Router Screenshots where you can see every page of every router that we know of.
To setup port forwarding on the Dlink DSL-3780 router your device needs to have a static IP address. You should complete one of the following steps first:
Now that you have setup a Static IP Address on your device, please enter the IP address that you assigned to your device here:
In the picture above the address bar has http://www.google.com in it. Just replace all of that with the internal IP address of your Dlink DSL-3780 router. By default the IP address should be set to 192.168.1.1.
You should see a box prompting you for your username and password. Enter your username and password now.
Click the Ok button to log in to your Dlink DSL-3780 router.
Please visit our Default Dlink Router Passwords page if the username and password shown below did not work for you.
If you can't login to your router because you forgot your Dlink DSL-3780 router username and password, use our How to Reset a Router Password guide to set your Dlink DSL-3780 router back to its factory settings.
Click the Advanced Setup link near the top of the page.
The menu on the left should change. In this new menu, click Virtual Server.
We will list a series of lines here that will show you exactly how to forward the ports you need to forward. Echolink requires you to forward the AppFullPortsListTag ports. Go ahead and enter the settings shown above into the Virtual Server menu and then click Add/Apply.
You should see another page of settings that need to be entered into one of the blank lines on your routers Virtual Server page. Go ahead and enter those settings and then click Add/Apply.
And that is it! You are done!
Now that you have forwarded ports for Echolink on the Dlink DSL-3780 you should test to see if your ports are forwarded correctly.