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Make a Computer As DMZ Host On BSNL Modem

If your computer is barred from accessing certain web applications due to NAT or Firewall restrictions, you can overcome it either by port forwarding or by converting your computer as DMZ host. DMZ stands for De-Militarized Zone and the PC assigned as DMZ host is out of modem/router firewall protection. BSNL modem has the feature to assign a device connected to it as DMZ host. For that, we must enter the IP address of the computer on BSNL modem to assign as De-Militarized Zone. Since BSNL modem treats the IP address as DMZ host, you must assign the same IP address as the static IP address of the device which you want to use as De-Militarized Zone. Procedure to place a PC in De-Militarized Zone for BSNL broadband modem is provided below.

Facing Slower Internet Speed?

DMZ Host Configuration In BSNL Modem
  1. Login to Modem

    By default, the login IP address is and admin is the default username and password.

  2. Click on the Security tab

  3. Click on Virtual Server link

  4. Enter the static IP address you assigned to your PC as DMZ host address
    Use your computer as dmz host in bsnl Internet

You must enter the static IP address assigned to your computer as the De-Militarized Zone address in BSNL modem. Also, make sure the static IP address you have assigned to your PC is not in the IP range of the DHCP server. For example, if the DHCP range is 50 and the starting IP address is, it is safe to use an IP address from onwards.

Benefits & Risks of Using a Computer As DMZ Host
If your computer is facing issues with accessing certain websites or playing online games when connected to BSNL modem in PPPoE mode, you can override the BSNL modem restrictions by converting your computer as DMZ host. Your PC is open to the Internet without any protection or restrictions from modem firewall security when it is DMZ host. It risky to use a laptop in De-Militarized Zone because it is no longer protected from external threats unless your laptop has separate firewall protection. So it is not very recommended use a device as DMZ unless you are a hardcore gamer or planning to use your computer as a web host. By installing a reputed firewall program on your computer, you can enable protection even if it is acting as in De-Militarized Zone.

Recommended Tutorials
  1. What is De-Militarized Zone and Its Use

  2. How to Assign Static IP Address From Command Prompt

  3. How to Configure Broadband On Teracom Modem in PPPoE Mode

  4. I Cannot Open Certain Websites Using BSNL Connection

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This same procedure will works in all router network if you are going to do port forwarding you can access more that one device. It will works better than DMZ. Because if the router is publicly accessible after doing the DMZ you are only able to access your router from outside, so it's better you can go ahead with port forwarding.
Alex George said…
I agree with your comment about the superiority of Port forwarding over DMZ. However, in modern routers and modems, DMZ host receives different IP address (not in the range of private IP address provided to other devices from DHCP) and is treated as placed entirely outside the network. DMZ host has no connection with other devices connected to the modem. Accessing the router from DMZ is also prohibited.

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Alex George
Alex George has Engineering graduation in Computer Science and an MBA in Finance. He had been working as a senior Network Engineer for ten years. His specialization is in Cisco products. Traveling is one of his hobbies and visited various places as part of his onsite work. He visited different places as part of his onsite work like New York, Dubai, London, etc. Right now Alex is a director of one of the leading career development firms in India, which trains students for UPSC, SSC, and PSC examinations. He guides a lot of students to get selection for various prestigious institutions like CBI, Income Tax Department, etc. Alex George is a stock market investor and a very active intraday trader. Engineering Background: He has a B.Tech in Computer Science and Engineering and passed different network and security courses like CCNA, CCNP (Security), CEH, and various Microsoft certifications. Finance Background: Alex has an MBA in Finance. He is an active intraday trader and a Share Market Investor. Webmaster Skills: Alex is a blogger since 2004. He has a working knowledge of HTML, CSS, PHP, and JavaScrip.