In order to configure your DSR router, you must log in to the Web Interface of your router - How do I log in to my router?
Select your Configuration Interface:
OLD GUI

NEW GUI

Old GUI
Step 1: Click on the Advanced tab. On the left side click on Firewall Settings > Custom Services.

Step 2: Click Add.

Step 3: Configure your custom Service:

- Name - Enter a name for the service (i.e. NVR)
- Type - Select the Port type (TCP/UDP)
- Port Type - Select your desired port type
- Start Port - The 1st port you want to open/forward
- End Port - The last port you want to open/forward
Note: If only entering one port, enter the same port number in both the start and end port fields.
Step 4: Click Save Settings.
New GUI
Step 1: Click on the Security tab. Under Firewall click Custom Services.

Step 2: Click Add New Custom Service.

Step 3: Configure your custom Service:

- Name- Enter a name for the service (i.e. NVR)
- Type - Select the Port type (TCP/UDP)
- Port Type - Select your desired port type
- Source Start Port - Enter Port 1
- Source Finish Port - Enter Port 65535
- Destination Start Port - The 1st port you want to open/forward
- Destination Finish Port- The last port you want to open/forward
Note: If only entering one port, enter the same port number in both the start and end port fields
Step 4: Click Save.