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Open Port (NAT Port) on Viettel Modem vG-421WD-v2

Today I will show you how to open the modem port to install install remote camera view. Opening the port for the camera and using the domain name will help connect to the camera faster when using Cloud P2P. Also in case of remote pull also need to open the port. This guide is applicable to Viettel modem vG-421WD-v2 and equivalent product lines.

No matter what router/modem port you open, whichever carrier you’re on. You need to prepare yourself some of the following requirements:

  • Identifies the IP address of the DVR and the ports to open. 
  • Identifies the IP address of the router/modem (on cmd -> type ipconfig -> see address of Gateway)
  • Computer or phone and camera receiver must connect to the internet of router/modem.

Step 1: Log in to Viettel vG-421WD-v2 Modem

  • Log in to your modem by opening a web browser and typing: (default) or . It will show the router/modem interface and ask for login.
  • Default account and password are printed on the stamp below the router/modem.

Step 2: Open port on Viettel modem vG-421WD-v2

After logging in to the main interface on the router/modem, do the following:

As shown above, I am opening port 8889 only network device IP address

Step 3: Check port opening

After opening the port. You need to check if your port is open or not.

  • Browser will redirect to another page here you do the following: 
  • Click on the number after the text Your IP is
  • In the box IP address or host name  will appear that sequence of numbers
  • In the box Port Number you enter the ports you have opened. press Go.
  • If the results are as shown above, you are successful. In contrast, as shown in the image below, you are not successful, need to recheck the steps performed in on. 

Wishing you a successful installation!

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