How to Configure Bridge Mode on Your Router

What bridge mode does and when to use it

Bridge mode is a router setting that changes how the device handles network traffic. In most home routers, enabling bridge mode stops the router from acting as a router: it no longer performs NAT, hands out IP addresses with DHCP, or runs its own firewall, so another router can take over those jobs. The IEEE 802.11-2020 standard specifies the wireless LAN medium access control and physical layer for Wi-Fi, while bridge mode is a higher-level router feature that controls how traffic moves between network segments.

Use bridge mode when you have two routers on the same connection. The most common setup is an ISP-provided gateway connected to your own router. If both devices are routing, you can end up with double NAT, which can break port forwarding, online gaming, and VPN connections. In bridge mode, the ISP gateway passes the connection through and your own router handles the rest. When you only need one device to broadcast Wi-Fi, access point mode may be the better choice instead.

Before you begin: know your connection type

Before changing any settings, find out how your internet service arrives. If you have a separate modem or ONT, you may already be able to plug your own router directly into it with the correct WAN settings. If the ISP provides a gateway, you may need to bridge just that gateway. This is especially common on fiber connections, where the ISP requires an ONT and may also require PPPoE credentials or a VLAN tag. Check router ISP compatibility and WAN port types to confirm what your connection needs.

Write down any login credentials and connection details before you switch modes. Some ISPs post them on their support pages, while others print them on the device. You may need a username and password for PPPoE, a VLAN ID for the ISP network, or a static IP address. The fields you use in bridge mode should match what your second router needs to establish the connection. See PPPoE explained and VLAN tagging explained.

Configure the primary router or gateway

Log in to the admin page of the device you want to put in bridge mode. The address and login information are usually printed on the device or included in the manual. If you have not changed the admin password, change the router admin password before you expose anything to the network.

Look for a setting named Bridge Mode, IP Passthrough, Transparent Bridging, or sometimes PPPoE Bridge. In most routers it is under Internet, WAN, or Advanced Setup. When you enable it, the device generally stops routing and passes the WAN connection to the device connected to one of its LAN ports. In some gateway models, only a specific LAN port is used for passthrough. The exact location differs by manufacturer, and the Wi-Fi Alliance certifies the wireless features of the device, not the wording of the menus.

• NAT: disable it if there is a separate switch.
• DHCP server: disable it so only the second router assigns addresses.
• Firewall: disable it on the bridged device if this setting remains available.
• Wi-Fi: disable it unless you plan to use the device radios.

Configure the second router to take over

Connect an Ethernet cable from the bridged device LAN port to the WAN port of the second router. The second router should stay in Router mode, not Access Point mode, because it is now the device doing NAT, DHCP, and firewalling.

Open the second router WAN settings and choose the connection type your ISP uses. On many routers this is Dynamic IP, PPPoE, or Static IP. Enter the credentials you collected from the ISP. If the router asks for a VLAN ID, enter the value your ISP requires. Follow how to set up a new router for the general steps.

Give the second router a different local IP range if the bridged device still has its own IP address. This is not always required, but it avoids conflicts when both devices are on the same cable segment. If you are using a mesh system, connect one of its main nodes to the WAN port and complete the setup flow in the app or web interface.

Verify the bridge and secure the network

Check the WAN status on the second router after it connects. It should show the public or ISP-assigned IP address instead of a private address from the first device. If it still shows a private address in the first device range, the first device is still performing NAT and bridge mode may not have fully engaged.

Once the connection is live, secure the network on the second router. Use WPA3 if your devices support it. The Wi-Fi Alliance states that WPA3 is mandatory for Wi-Fi CERTIFIED devices and protections such as Protected Management Frames are required for new certified devices. If older equipment needs transitional mode, see WPA3 explained. Keep the firewall enabled on the second router and make sure its admin password is not left at the default. NIST develops cybersecurity and privacy standards and guidelines that many router makers use as they build security features.

Afterward, try the things you normally do: browse websites, make a video call, and confirm that any port-forwarded applications work. A few minutes of normal use can reveal obvious issues. If a device cannot connect, check the WAN status page and the cable connection first.

Handle ISP and troubleshooting cases

Some ISP gateways do not expose a bridge mode setting. In that case, contact the ISP and ask for IP Passthrough or for help moving your connection to a separate modem or ONT. On fiber connections, you may also need the ISP to register your own router if it does not use PPPoE. The process varies by ISP and is not controlled by the router.

If the second router cannot get an IP address after bridging, go back to the bridged device WAN settings and confirm the connection type is set to Bridge or IP Passthrough. Also confirm that you are using the correct LAN port, because many gateways use only one port for passthrough.

Bridge mode is not the same as access point mode. When you use access point mode, the device still relies on another router for IP addresses but keeps broadcasting Wi-Fi and may keep a switch. When you use bridge mode, the device normally stops routing and the downstream router becomes the main router. To decide which approach fits your setup, compare bridge mode explained with access point vs router.

What to pick for your use

Questions

Do I need my ISP permission to use bridge mode?

Usually not for your own router. If the ISP-provided gateway is locked, you may need to ask the ISP to enable IP Passthrough or provide the credentials required for your own router to connect.

Will bridge mode make my internet faster?

Bridge mode does not add speed. It avoids double NAT and lets your own router manage connections, which can solve some connectivity and port-forwarding problems.

Can I use my ISP router Wi-Fi when it is in bridge mode?

Some models let you keep the radios on, but most guides recommend turning Wi-Fi off on the bridged device so only one router broadcasts the network.

What is double NAT and why does bridge mode fix it?

Double NAT happens when two routers translate the public address. Bridge mode removes the first router NAT so your own router sees the public or ISP-assigned connection instead of another private network.