What Speedtest does xfinity use for their “ Your personalized WiFi summary”?

Does xfinity run a speed test on my phone when Xfinity generates the monthly report that I get in my email? I find that very implausible. 

I'm not asking how I can run a speed test. I'm asking how can I run the exact same speed test Xfinity uses in the monthly report? The month report always says I'm getting 110% or better of the speed I'm paying for, but I cannot replicate this speed.

@XfinityKassie , can you please find out how xfinity is doing the monthly report testing?

Thanks

I'm not speaking for or in support of what Xfinity does, but the reply you received is accurate. The only method Xfinity gives their subscribers to run a speed test between the "Internet <-> users gateway router" is through the Xfinity app. Any speed test users run through the browser is sort of invalid because those tests include testing all the way through the gateway router into the user's home network, and lastly to the PC. That's where things slow down. I've been about a frustrated about Xfinity's lack of transparency as everyone else when it comes to exactly what they are promising me in my plan. I too see the results in the app that displays something like this: You are receiving %118 above your plan of 300 Mbp/s. Then when is go to a site like Speakeasy Internet Speed Test, the results I receive are like:

>175 Mbp/s download

>41 Mbp/s upload

<15 ms Latency

<5 ms Jitter

The site scores those results as "Excellent"

Does this help you?

I apologize, but I thought I explained what I was seeing in my original post:

My monthly summery always report 20% higher speed than what I’m paying for. My own speed tests, even when my laptop is directly connected to the gateway, shows about 20% less than what I’m paying for.

So no matter what device I use, no matter if using the gateway in bridge mode or router mode, I generally see 70-80% of the speed I'm paying for (1gb/40mb). I always see 40+ on upload, but I rarely see download >800.

@user_l2c9a Good morning! Thank you for taking the time to reach out to our Xfinity Forums Team for assistance with your speeds. The speed test will be in the Xfinity App, under "test your whole home network". Do you see that option under Troubleshoot?

No, I do not. The only options are "Need Help now!" and "Restart you modem"

@user_l2c9a Good morning! Thank you for taking the time to reach out to our Xfinity Forums Team for assistance with your speeds. The speed test will be in the Xfinity App, under "test your whole home network". Do you see that option under Troubleshoot?

Are you sure when you run a speed test from the App it's not just checking the speed from the phone, through the gateway to the internet? I'm pretty sure there is no way to run a speed test from the gateway (at least an XB8). 

Yep, there are actually two different measurements. The Xfinity app's Speed to Gateway test measures the Internet connection directly to a compatible Xfinity Gateway, rather than measuring the Wi-Fi speed reaching the phone you're holding. A traditional speed test on your phone or computer measures the connection all the way to that particular device.

That's why comparing the two can be useful. If the gateway is receiving the expected speed but your device isn't, the difference can help point toward the connection between the gateway and device rather than the incoming Internet connection.

Once I turned off Bridge mode, I can see and test speeds.

@user_20satt​ I see there was an issue with "Xfinity Shield" earlier this year, but I'm not seeing any CVEs for bridge mode. Where are you getting your data? Just one data point?

If you don't know what a CVE is, it's short for Common Vulnerabilities and Exposures, and is a list of publicly disclosed computer security flaws. 

If you use bridge mode, you are responsible for setting up your router, including security settings. I would not say it makes a home network more vulnerable; it shifts the responsibility for security to the home network admin. The general recommendation is, if you aren't pretty knowledgeable, don't do it. I'm aware of every security setting on my routers, and where I use port forwarding, those computers are hardened. I also don't run a web server from home network. Web servers, especially ones with add-ons, are hard to harden. Look at all the fun we just went through with PHP!

As for the "Wi-Fi Motion Sensing" in Shield. Nope. Best to stay away. In fact, turn on bridge more pretty mush turns off much of the protections Xfinity includes. Those protections are great for the lay folks, but using bridge mode is for the experienced. 

I cannot find anything on the interwebs about how bridge mode might make a home network vulnerable, other than not securing the router behind the modem.