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Friday, October 20th, 2017 5:34 PM

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Bridge-mode vs IP Pass-through - Info from the AT&T Community

Learn how to set up your own router

 

The Arris BGW210-700 BGW320 is an advanced residential gateway that supports VoIP, IPv6, video delivery, security firewall, and extensive remote management features. 

 

The BGW210-700 Broadband Gateway delivers robust video, primary line telephony, and high-speed data over broadband networks via high-speed Internet connectivity.

 

The four Gigabit Ethernet ports can be separated into different services allowing the configuration of dedicated ports for data. It is designed for advanced DSL network service deployments and supports Quality of Service (QoS) and IP Passthrough.

Heads up: MAC Filtering has been disabled on the 5268AC. If you are in need of a modem that requires MAC Filtering, please reach out to us in the AT&T Community

 

Determining the Business Need

You may need your gateway configured or placed into a Bridged Mode. The internet architecture does not allow for bride mode, but you can setup IP Passthrough, which should allow for most of the same things. 

 

IP Passthrough means the AT&T supported CPE device terminates the DSL, authenticates with the network (Receives a WAN IP) and shares that IP address with a single device connected to the AT&T supported CPE equipment. This configuration is often times suitable for a business customer desiring to connect third party equipment to AT&T supported equipment. The IP Passthrough configuration still allows AT&T support groups to access the AT&T supported equipment while allowing end-users to connect third party equipment in a configuration they desire. The IP Passthrough configuration will only allow one connection to AT&T supported equipment to be "unfiltered" or pingable from the WAN or internet side of the AT&T equipment (does not support multiple pingable connections).

 

The IP Passthrough feature allows a single PC on the LAN to have the AT&T Gateway's public address assigned to it. It also provides port address translation (PAT) or network address and port translation (NAPT) via the same public IP address for all other hosts on the private LAN subnet.

Using IP Passthrough, the public WAN IP is used to provide IP address translation for private LAN computers. The public WAN IP is assigned and reused on a LAN computer.

 

Note: Remember to make a copy of all current IP settings before proceeding.

 

Configuring IP Passthrough

Run your Web browser application, such as Firefox and Chrome, from the computer connected to the Arris BGW210-700 and BGW320. 

  • Enter http://192.168.1.254 in the Location text box. 

  • Click the IP Passthrough tab and configure your settings. 

Dynamic host configuration protocol (DHCP) address serving can automatically serve the WAN IP address to a LAN computer.

 

When DHCP is used for addressing the designated IP Passthrough computer, the acquired or configured WAN address is passed to DHCP, which will dynamically configure a single servable address subnet, and reserve the address for the configured PC's MAC address. This dynamic subnet configuration is based on the local and remote WAN address and subnet mask.

 

  • The two DHCP modes assign the needed WAN IP information to the client automatically.

    • You can select the MAC address of the computer you want to be the IP Passthrough client with fixed mode or with first-come-first-served dynamic. The first client to renew its address will be assigned the WAN IP.

     

  • Manual mode is like statically configuring your connected computer. With Manual mode, you configure the TCP/IP Properties of the LAN client computer you want to be the IP Passthrough client. You then manually enter the WAN IP address, gateway address, and so on that matches the WAN IP address information of your AT&T device. This mode works the same as the DHCP modes. Unsolicited WAN traffic will get passed to this client. The client is still able to access the AT&T BGW210 device and other LAN clients on the 192.168.1.x network.

  • DHCP Lease: By default, the IP Passthrough host's DHCP leases will be shortened to two minutes. This allows for timely updates of the host's IP address, which will be a private IP address before the WAN connection is established. After the WAN connection is established and has an address, the IP Passthrough host can renew its DHCP address binding to acquire the WAN IP address. You may alter this setting. 

  • Click Save. Changes take effect upon restart.

 

Note: IP Passthrough Restriction

Since both the BGW210 Internet Gateway and the IP Passthrough host use the same IP address, new sessions that conflict with existing sessions will be rejected by the BGW210. For example, suppose you are working from home using an IPSec tunnel from the router and from the IP Passthrough host. Both tunnels go to the same remote endpoint, such as the VPN access concentrator at your employer's office. In this case, the first one to start the IPSec traffic will be allowed; the second one from the WAN is indistinguishable and will fail.

 

Jared, AT&T Community Specialist

 

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*I am an AT&T employee, and the postings on this site are my own and don't necessarily represent AT&T's position, strategies or opinions.

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4 Attachments

Tutor

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5 Messages

5 years ago

for me it said " address may not be in network" what do i do? i have a nighthawk router i want to put in

Tutor

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5 Messages

5 years ago

c. For Network Address, type in the Gateway address of your secondary router, but use a “0” instead of a “1” for the final octet. So for this example, I typed in 100.10.1.0.

 

 

 

****

- I have a netgear 2600 nighthawk router, my gateway address is  5 numbers **.*.*.1

not letting me put that in, im sorry im very confused i just want my nighthawk to be running and using all its features

Contributor

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1 Message

5 years ago

I have had U-verse since 2016 here with the Pace 5268AC. How can I swap that router out for the Arris BGW210-700? The Pace really throttles my Unifi network.

 

Thanks!

Contributor

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2 Messages

5 years ago

I disabled the AT&T BGW210 wifi radios and connected a Netgear Wi-Fi router to one of the Gateway’s ethernet LAN ports. The bandwidth speeds are better with the NetGear Wi-Fi router but the download speed never tests above 500Mbps while the upload tests at around 900Mbps. My MacBook is directly wired to one of the other gateway’s LAN ports and consistently tests at around 900Mbps up/down. I did not set the Gateway to IP Passthrough after disabling the Gateway’s WiFi radios. Could that setting increase the NetGear WiFi router download speed or is it designed for some other purpose? My only goals are increasing that NetGear WiFi router download speed and secondarily solving any other unstable behavior associated with the current or passthrough configurations

Contributor

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2 Messages

5 years ago

I have enabled IP Passthrough on my ATT Arris NVG599 to my Untangle Firewall and it's working fine. I also disabled all of the advanced firewall features and disabled the packet filters on my NVG599.

 

The only device I have attached to my NVG599 is the Untangle Firewall and my Home Phones.

 

Question I have is does disabling advanced firewall and packet filters on the NVG599 pose a security issue for my phones?

 

I know this could be a silly question, but want to make sure I'm not unknowingly creating a security risk.

Contributor

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2 Messages

5 years ago

Just checking back since it's been a few days to see if anyone can help me on my previous post just above this one.

Contributor

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2 Messages

5 years ago

i got my fiber connection setup and get close to 1gig speeds but i want to use my own router. I followed ip passthrough steps to use with my R7000 router. everything seems to have worked fine but for some reasons all my speed tests wired/wireless are limited to 300/300. i cant break those speeds. is possible to get higher than that using a 3rd party router?? 

Contributor

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1 Message

5 years ago

  1. I’m using an ASUS RT-AC86U and have tested up/down a bit over 500 a couple of times.  On average though I’d say it’s closer to 390/415.  I didn’t turn on cascade as I didn’t need that but I did disable all Advanced Firewall settings and SSID broadcasting.  I’m using a Cat5 from the AT&T modem port 1 to my ASUS WAN port. 

Contributor

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2 Messages

5 years ago

i got my fiber connection setup and get close to 1gig speeds but i want to use my own router. I followed ip passthrough steps to use with my R7000 router. everything seems to have worked fine but for some reasons all my speed tests wired/wireless are limited to 300/300. i cant break those speeds. is possible to get higher than that using a 3rd party router?? 

 

I found that my router hardware could not handle full speeds with features on. once i disabled features and left it stock with only wireless settings on i was able to hit high speeds. 

Tutor

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4 Messages

5 years ago

I get very close to 1 Gbit for both down and up, but understand that there are many factors in play.

I only get those high results using the Speedtest app (standalone, not web-based), on a newer model Mac that is connected via Gigabit directly to the same Apple AirPort Extreme Basestation that is my main router which is the pass through destination of the AT&T hardware.

It also depends on what's between your home, the AT&T equipment in your neighborhood, the distance to their actual point of presence, and from there to wherever they actually punch-out to the real Internet, *and* which speed test destination you choose. It's < 500 feet to the AT&T entry point to our neighborhood and from there it's less than 1 mile to the actual AT&T point of presence.

Wirelessly, I can get close to Gigabit, but slightly slower, but only when standing directly in front of one of my 802.11ac AirPort Extreme Basestations. My iPad Pro 12.9" (lastest/fastest) gets slightly better results than my iPhone X (original year+ old model). Understand also that these devices automatically lower their bandwidth demand, for power-savings reasons, if you're not doing anything terribly bandwidth intensive. I have to do several speed tests in a row before they kick up to full 802.11ac maximum bandwidth mode.

YMMV
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