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Difference Between Configuring Modem in Bridge Mode and PPPoE Mode

As I mentioned in my old posts, I started my career in computer networking as a SOHO consultant. In first few months we were assigned to configure Local Networks in small offices. During the time the first thing I learned was the differences between configuring a DSL modem in bridge mode and PPPoE mode. It is because the mode of modem configuration entirely affects the router configuration. If your modem is configured in bridge mode, you need a dialer to access the Internet and every time you must enter the Username and Password provided by ISP. If your modem is in PPPoE mode, the connection is always on. It means you do not need to use any dialer to access the Internet. Below you can see a summary of differences between a modem in bridge mode and PPPoE mode.

Major Differences Between PPPoE Mode and Bridge Mode

  1. Bridge Mode Supports only one computer but PPPoE supports multiple computers
  2. In bridge mode, you need to dial every time to connect Internet. PPPoE mode is always connected.
  3. PPPoE is more secure compared to bridge mode.
  4. In Bridge mode, there is no need for port forwarding but in PPPoE mode, you may need port forwarding
  5. NAT is supported in PPPoE mode but in bridge mode there no no NAT
  6. The computer connected to the modem in bridge mode gets the public IP address but in PPPoE mode, your computers get private IP addresses.
The most important difference between PPPoE mode and bridge mode is the number of computers supported in each mode. Only one computer can be connected to a modem configured in bridge mode. Since NAT is supported in PPPoE mode, we can connect multiple computers to a modem in PPPoE mode. Computers connected to the modem in PPPoE mode can access the Internet directly because ISP username and password are saved in the modem.

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The computer connected to a modem setup in bridge mode need you to log in with username and password provided by ISP and dial to access the Internet every time. A modem in PPPoE mode can work as a router with feature like NAT, Firewall, DHCP etc. With these additional features modem in PPPoE mode is more secure than a modem in bridge mode. You may need to perform port forwarding on modem configured in PPPoE mode for the proper working of certain applications. You do not need to do port forwarding on modems in bridge mode.

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As per the above post, we can see it is better to configure your modem in PPPoE mode unless you have other priorities. In case if you want to learn a practical example to configure a DSL modem in PPPoE mode, click on the link below.
How to Configure Reliance DSL Modem in PPPoE Mode

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If you are looking for another practical example to configure a modem in PPPoE mode, follow the link below.
How To Configure BSNL Modem in PPPoE Mode