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AT&T BGW320-500 (All-Fi Hub): own router and bridge mode

Can I use my own router with the AT&T BGW320-500 (All-Fi Hub)?

Partial

Use IP Passthrough (AT&T documents no bridge-mode switch)

  • Bridge modeNot in the ISP pages we read
  • IP PassthroughYes, documented by the ISP
  • Own routerYes, documented by the ISP

Checked October 26, 2026Confidence: high3 sources

AT&T documents IP Passthrough on the BGW320, which hands the public IP to your own router. AT&T describes passthrough as an alternative to bridged mode and shows no separate bridge-mode setting.

Model numbers: BGW320-500 · Type: Gateway (modem + router)

How to set it up

  1. Open your gateway settings from a computer connected to the gateway and sign in with the Device Access Code printed on the gateway sticker (if asked).
  2. Go to Firewall, then IP Passthrough.
  3. Set Allocation Mode to Passthrough and Passthrough Mode to DHCPS-fixed.
  4. Enter your own router's WAN MAC address in the Passthrough Fixed MAC address field.
  5. Save, then choose Restart Now. Reboot your router (and the gateway if needed) so it picks up the new public IP.

Know before you switch

  • Only one device can be placed in passthrough mode (AT&T).
  • A device in passthrough mode loses the firewall protection provided by the AT&T gateway and gets a WAN IP instead of a LAN IP; other devices on the gateway may not be able to share files with it (AT&T).
  • AT&T's articles name 'BGW210 or BGW320' without the -500/-505 suffix, so the model suffix is not separately confirmed by AT&T.

How sure are we?

Confidence is high. Passthrough steps are from AT&T for the BGW320 family; the -500/-505 suffix is not named on the page.

This page reports what the ISP documented on the date above. ISPs change firmware and policy; if your gateway screen differs, trust your ISP's current page.

Quick answers

Can I use my own router with the AT&T BGW320-500 (All-Fi Hub)?

Partial. use IP Passthrough (AT&T documents no bridge-mode switch)

Does the AT&T BGW320-500 (All-Fi Hub) have bridge mode?

Not in the ISP pages we read.

Does the AT&T BGW320-500 (All-Fi Hub) support IP Passthrough?

Yes, documented by the ISP.

How sure is this answer?

Confidence: high. Passthrough steps are from AT&T for the BGW320 family; the -500/-505 suffix is not named on the page. Checked October 26, 2026 against 3 ISP sources.

Sources and retrieval dates

  1. AT&T: Get help with DMZ+ zone devices (BGW210, BGW320, Pace 5268)att.com · read October 26, 2026
  2. AT&T Business: Configuring IP Passthrough and DMZplusatt.com · read October 26, 2026
  3. AT&T: Learn about your All-Fi Hub (BGW320)att.com · read October 26, 2026

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