AT&T BGW210 Gateway - IP Passthrough vs. Static IP Allocation

AT&T BGW210 Gateway - IP Passthrough vs. Static IP Allocation

PLEASE READ: There is a difference in using IP passthrough and assigning a device a static IP behind an AT&T gateway. This uses the BGW210 model gateway as an example but is similar to some other models. There will be differences with varying models and some use Pinhole Mode or DMZ Plus. This is specific to the BGW210 Model AT&T Gateway.

Configuration #1 - Dynamic IP Address from AT&T - IP Passthrough

  1. NOTE: For this work you need your WAN port in the firewall/router to be in DHCP Mode.
  2. If AT&T is on a dynamic IP address you will want to use IP Passthrough to assign their Public Dynamic IP to the firewall or router.
  3. You can check and see if there are Public IP addresses assigned by going to Home Network -> Subnets & DHCP and looking at the Public Subnet.


  4. If Public Subnet Mode is Off and the boxes are empty then you DO NOT have Static IP addresses assigned to the gateway.
  5. To assign a Dynamic IP address to the firewall/router use IP Passthrough by going to Firewall -> IP Passthrough and then turn on Allocation Mode to Passthrough.
  6. Depending on how you want it to allocate you can choose DHCPS-Fixed, DHCPS-Dynamic, or Manual, but I strongly suggest you ONLY use DHCPS-Fixed.
  7. Then select the Device according to its MAC address from the Device List.


  8. Once you select the device then Save the settings.
  9. The once the device is rebooted (or just unplug the WAN cable and plug it back in) it will show under Device -> Device List.
  10. It will show the IP Passthrough Public IP address from AT&T and as it being assigned via Passthrough.
       

  11. Lastly, you need to disable all of the Advanced Firewall rule in the AT&T gateway.
  12. Go to Firewall -> Firewall Advanced and turn everything OFF.


  13. This concludes how to assign a device an external dynamic address with the BGW210.
    NOTE: You can then use the address above to ping the firewall and gain remote access to the firewall, if it is allowed via the firewall rules.

Configuration #2 - Static IP Addresses from AT&T - Public DHCP and/or Static Assignment

  1. For this configuration you can use DHCP Mode or assign a Static IP address to the WAN Port on the firewall/router.
  2. If AT&T assigns  Static IP addresses you will want to use Public Subnet DHCP server to assign the Static IP to the firewall or router.
  3. You can check and see if there are Public IP addresses assigned by going to Home Network -> Subnets & DHCP and looking at the Public Subnet.
  4. If Public Subnet Mode is ON then you have Static IP addresses assigned to the gateway.
  5. To assign a Static IP address to the device use Public Subnet DHCP by going to Home Network -> Subnets & DHCP and then make sure that Public Subnet Mode is ON and that the Primary DHCP Pool is the Public Subnet.

  6. Then once the device is rebooted (or just unplug the WAN cable and plug it back in) it will show under Device -> Device List.
  7. It will show that the device has pulled a Public IP via DHCP from the gateway.


  8. If you are going to staticly assign an IP address to the device then set the WAN port in Static Mode and assign it.
    (Skip to the Advance Firewall Rules if you do this.)

  9. If you want to use the DHCP Public Subnet you will need to IP Allocation in the gateway.
  10. To do this go to Home Network -> IP Allocation and find your device.
  11. It will show that it using DHCP Allocation instead of Fixed Allocation.


  12. Click on Allocate next to your device and assign it a Public IP of your choosing.


  13. Save the setting and reboot the device (or just unplug the WAN cable and plug it back in)
  14. it will show under Device -> Device List as having the IP Allocated address and it is getting it via DHCP.


  15. Lastly, you need to disable all of the Advanced Firewall rule in the AT&T gateway.
  16. Go to Firewall -> Firewall Advanced and turn everything OFF.


  17. This concludes how to assign a device an external static address with the BGW210. 
    NOTE: You can then use the address above to ping the firewall and gain remote access to the firewall, if it is allowed via the firewall rules.

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