Call for the Best Cable, Phone and Internet Deals: 855-349-9328
Call For Best Deals: 855-349-9328

Why go for slow-paced DSL or cable internet service when you can get more at the same price? The ultra-fast AT&T fiber internet gives you almost symmetrical gig speeds at very reasonable price-points along with a 99% reliability guaranteed. It ensures that all your home devices retain stable and consistent connectivity throughout. So you and your entire household can enjoy quick surfing, heavy-duty gaming, hardcore streaming, and even telecommute without a hitch on the AT&T home network.

In your AT&T fiber Internet plan, you get a Wi-Fi Gateway — a modem and Wi-Fi router combo — delivered to your home via a technician as they deftly install the fiber internet set up at your residence. But, you may also opt for using your own router which is already available at hand.

How to Use Your Own Router with AT&T Fiber?

There are many reasons you may want to use your own router. Foremost being greater Wi-Fi coverage at your residence as AT&T fiber Internet Wi-Fi Gateway coverage may not be to your liking. After all, you’ve got these amazing gig speeds being supplied to your house. But when your own router is better able to deliver those speeds with ultra-low lags, you may love to know how to achieve that.

AT&T currently doesn’t permit its fiber subscribers to solely rely on a third-party router, but you can still utilize your own router behind the AT&T-provided fiber router/modem. For this, you may need to configure the AT&T fiber router to another router.

How to Configure AT&T Fiber Router To a Third-Party Router?

As AT&T (for ESP user AT&T Español) wants you to utilize the company-provided router with your own, it may require some configuration settings. Two routers can wreak havoc on the network, as each possesses its own private network. So the connected devices around the house may have trouble interacting with each other.

You can configure the AT&T fiber router to router via Bridge Mode configuration. This mode enables the user to connect two routers on one network and averts any performance backlash. The configuration disables the Network Address Translation (NAT) feature on the modem and prevents any IP address conflict by enabling the router to perform as a DHCP server.

As for AT&T router/modems, you may need to keep the company provided gateway, but can configure your own router into the AT&T gateway and disable the wireless network on the AT&T gateway.

However, there may be some limitations to setting up a bridge mode as there it is not possible to attain true bridge mode with an AT&T gateway. The alternatives like IP passthrough can get you a decent enough configuration. However, the passthrough mode may deprive you of firewall protection provided by the AT&T fiber gateway.

There are several ways to configure the setup depending on which AT&T fiber router/modem model you have: Motorola NVG 510 or 589, and 2Wire/Pace device.

To determine which device you have, connect your AT&T fiber router/modem to the PC with an Ethernet cable, and follow the applicable instructions.


The AT&T gateway server assigns the WAN IP address to the first device that requests its DHCP address on the LAN.

  • In the browser of your computer connected directly to the AT&T fiber gateway, enter
  • Go to the Firewall tab on the gateway’s GUI page, and select IP Passthrough right below the Firewall tab
  • If requested, enter the Device Access Code
  • In the Allocation Mode drop-down menu, choose the Passthrough option
  • Then, in the Passthrough Mode drop-down, choose DHCPS-dynamic
  • Now, click on Save.
  • Select the Restart Now option when a re-start gateway reminder appears.
  • Also, reset your third-party device to refresh the network connection as it receives the public IP address


If you want to connect more than one device directly to the AT&T gateway, then this configuration is viable as it assigns the DHCP server to a specified MAC address.

  • Use the browser of the PC directly connected to your AT&T gateway.
  • Upon opening the browser, log in to AT&T fiber router with
  • Go to Firewall on the gateway GUI page, and choose IP Passthrough below the tab.
  • If prompted, enter the Device Access Code
  • Choose the Passthrough mode on the Allocation menu.
  • In the Passthrough Mode drop-down, select the DHCPS-dynamic option, and click save
  • Click Restart Now as the restarting reminder appears, and also reset the newly configured third-party device.


For manual configuration, you’d need your WAN IP address, subnet mask, and default gateway, for which you would need to contact AT&T support. However, all the gateway information is assigned to the gateway through DHCP, if the AT&T fiber gateway gets a different WAN IP, your device will lose connectivity until you update AT&T fiber router/modem manually in its settings.

  • On your directly connected PC, open the browser and log in to
  • Go to Firewall tab, choose IP Passthrough below the tab
  • If prompted, enter the Device Access Code
  • On the Allocation Mode drop-down menu, choose the Passthrough option
  • Choose the Manual option, and click save
  • Restart your gateway to complete the settings
  • Now, manually configure your third-party device with the WAN IP address, Subnet Mask, and the default gateway given to you by the customer care.

Default Server

You can also opt for the Default Server Mode in the Motorola gateway a sit permits the AT&T fiber gateway to convey all the externally initiated IP traffic (only TCP and UDP protocols) to a specified device on the LAN. So the configured router will continue to use a LAN IP address, instead of an assigned WAN IP in the Default Server mode.

  • In the browser of your computer connected directly to the AT&T fiber gateway, enter
  • Go to the Firewall tab on the gateway’s GUI page, and select IP Passthrough right below the Firewall tab
  • If requested, enter the Device Access Code
  • Choose the Default Server option in the Allocation Mode menu
  • In the Default Server Internal Address field, input the IP address of the device you intend to set as the default server.
  • Click Save, and Re-start Now.

For 2Wire/Pace Gateways here are the following instructions:

The passthrough mode in these gateways is known as DMZplus mode. Your device must be directly connected to the AT&T Fiber gateway and configured to acquire an IP address via DHCP.

  • On the PC directly connected to your AT&T fiber router/modem, open its browser
  • Enter in the address bar of the browser.
  • On the GUI page, go to Settings, then Firewall, then Applications, then Pinholes, and finally, DMZ
  • Choose the third-party device name or its IP address in the Select a Computer option to set that device in DMZplus mode
  • Choose the Allow all Applications (DMZplus mode) radio button, and click Save

How to Get a True Bridge Mode Connection with AT&T Fiber Router/Modem?

The true bridge mode is the most desired router configuration as it transforms your AT&T Gateway to that of an enterprise modem. Unfortunately, it isn’t possible on an AT&T platform as it is not compatible with AT&T services.

Besides, there is another way to circumvent it and attain the closest true bridge mode you can get. It may allow you native and working IPv6 support, consistent internet speeds with a third-party router, but not gateway and firewall monitoring.

However, this comes at a certain additional monthly fee from your provider as you acquire a block of LAN static IPs. These static IPs are a bunch of public IP addresses that AT&T leases to you through the LAN, and function similarly to your regular LAN IP. But, you can statically assign these acquired addresses to any device on your AT&T network. You can use multiple unique public IP addresses for multiple routers, but most likely you would need only one router for your home AT&T network.

Instructions for True Bridge Mode setup:

  • Get your block of internet static IP addresses from AT&T
  • In your browser’s address bar, enter (See below, for detailed login instructions)
  • Go to LAN, then click on DHCP
  • Change the New Device DHCP Pool, and change it to Public Routed Network. (As you connect your third-party router with AT&T fiber gateway, the router will automatically catch one of your purchased public IP addresses)
  • For more AT&T fiber router optimization, disable the firewall and your wireless network settings.

If you have other AT&T services connected to the home network, such as AT&T TV, keep your New Device DHCP Pool option to private, and instead;

  • Go to LAN IP Address Allocation.
  • Go to WAN IP Mapping, and look for your third-party router.
  • Manually assign the router to one of the Static IP addresses in the drop-down menu.
  • Also, set the Firewall setting to Disabled.

Now your own router can function well by utilizing its own Public Static IP address.

How to Login To AT&T Fiber Router

Before you do configuration mojo, and set up your own router, you have to access your AT&T fiber router. The login is very crucial as an AT&T fiber internet service subscriber as it lets you perform a lot of settings for your AT&T router to your satisfaction, including changing default login credentials.

It’s very easy to log in to your router, just follow the steps.

(In case the password cannot be found on your AT&T device and its packaging either, leave the fields blank and attempt to proceed. If you cannot proceed further, contact AT&T for support)

  • Ensure your AT&T gateway is switched on with the appropriate LED indicators blinking on the device.
  • Connect your computer to the AT&T gateway via a LAN or the wireless network.
  • Open your browser, and input the following address in the bar:
  • Press enter to proceed to the log-in page.
  • The log-in page would require your router credentials. If you haven’t changed your AT&T router credentials yet, then you can enter ‘admin’ in the username field. For the password, you’d find it at the side of your modem beside the ‘Device System Code’ or ‘System Password’. Enter the password on the log-in page.
  • Upon completion of your login details, press enters and you would be greeted on a page that displays your AT&T fiber router’s web interface. Now, you can change the default router login credentials to the one you prefer and configure your AT&T fiber router.

Bringing it All Together

Sure, the AT&T-provided gateway works for most of the customers, but for some, it may leave notes of discontent as it does not provide enough signal coverage to their home. In that case, they can opt for AT&T Wireless Mesh Extender, which ensures that your multiple-story expansive house can get wall-to-wall coverage. However, a tried and tested router may be able to deliver better fiber speeds than the AT&T one, so you can always opt for that option.

It is very simple and easy to configure your AT&T fiber router/modem to your own router, just follow the instructions provided and you are good to go. You can also speak to an expert at AT&T customer service for more assistance.

Frequently Asked Questions (FAQs)

Can I use my own router with AT&T Fiber?

AT&T currently doesn’t permit its fiber subscribers to solely rely on a third-party router, but you can still utilize your own router behind the AT&T-provided fiber router/modem.

Is AT&T Fiber available in my area?

AT&T Fiber has limited availability. To know if you can subscribe to AT&T Fiber plans in your area, call 1-855-820-1220 for help.

More About AT&T