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comment by cgod
cgod  ·  423 days ago  ·  link  ·    ·  parent  ·  post: Pubski: March 22, 2017

I've had coustomers who's devices frequently leap into Xfinity wifi instead of the shop wifi. I guess it's a thing. Maybe Xfinity forces it somehow? They'd like all your data.

It's only been 1 out if 100 people it seems to happen to. Have you tried a different brand of phone yet?

kleinbl00  ·  423 days ago  ·  link  ·  

It's a known problem.

    You go into a bar. Standing in the doorway, you say, loudly, "Hey, Mike!" 22 people named "Mike" turn around and stare at you for more information. You, lacking Mike Murphy's last name, say, "Hey, Mike!", again to 22 angry Mikes who all try to answer you at the same time in a mass confusion as they are all Mike. Everyone is lost as you can't talk to 22 people simultaneously. That's what Comcast has done to crash wifi across America. Every Comcast wifi hotspot has the SAME EXACT SSID, "xfinitywifi".

    So, your stupid Windows/IOS/Android/Apple computer calls to connect to "xfinitywifi". At my local Waffle House, 15 of them all answer my call SIMULTANEOUSLY and, usually, nothing even connects. If one does connect, in the off chance one is a little stronger than the rest, the first time you send data to it, they all start calling and calling trying to reconnect. We sit with a professional networking program and joke about how stupid this is from this giant communications company that should, but doesn't, know better. Unless you can get close enough to ONE xfinitywifi that obliterates the signals from all the other xfinitywifi stations on the channel (1 or 6, sometimes 11), it WON'T WORK! As usual, when trying to describe this to tech support who know how to configure cable boxes but have no idea how 802.11(x) wifi operates, trying to get the Comcast beast to CHANGE the SSIDs to something UNIQUE, such as "xfinitywifi + the last 4 hex characters of that modem's MAC address" is like trying to push a 2500 pound elephant up a hill. Every hotspot having the same SSID must be ok or the Comcast beast wouldn't have done it. So, expect wireless wifi in every Comcast city in America to become a nightmare of stations all with the same SSID crashing and crashing and trashing wifi for everyone, not just Comcast's inop customers unless FCC does its job.

Starbuck's can pull it off because although they're everywhere, there generally aren't more than three per block. On the other hand, the birth center backs up against a 22-unit apartment building and unless you buy your own modem, every single Comcast customer is bleeding out "xfinitywifi" giving your phone around 11 SSIDs with the same name.

I can watch the "xfinitywifi" signal jump 20dB as my phone chooses between three or four of them.

Project Fi only works with Google or Nexus-branded phones because only Google or Nexus-branded phones will run dual-band on a single SIM. Your choices are 5X, 6, 6P, Pixel or Pixel XL.

Also, if your router is running damn near any kind of security, it'll take an extra second or two over barely-secure xfinitywifi. My laptop does it often, even though I'm less than five feet away from a rock-solid Netgear Nighthawk. It's the security.

veen  ·  423 days ago  ·  link  ·  

Then how does eduroam solve this problem? I have solid wifi on all campuses in the world and throughout all campus buildings with no issues like this, through one single 'eduroam' SSID.

kleinbl00  ·  422 days ago  ·  link  ·  

Ever set up an Airport Express? Simple as fuck, right?

How bout setting up an Airport Express to extend an existing network? utter shitshow, right? I'm not even sure they let you do it anymore. Take it from me - it takes about five hours of experimentation the first time, then pretty much every time you change something, expect to spend another couple hours.

Wanna see how Eduroam does it? It's on the Wikipedia page:

    The eduroam service uses IEEE 802.1X as the authentication method and a hierarchal system of RADIUS servers.[15] The hierarchy consists of RADIUS servers at the participating institutions, national RADIUS servers run by the National Roaming Operators and regional top-level RADIUS servers for individual world regions. When a user A from institution B in country C with two-letter country-code top-level domain xy visits institution P in country Q, A's mobile device presents his credentials to the RADIUS server of institution P. That RADIUS server discovers that it is not responsible for the Institution_B.xy realm and proxies the access request to the national RADIUS server of country Q. If C and Q are different countries, it is in turn proxied to the regional top-level RADIUS server, and then to the national RADIUS server of country C, which has a complete list of the participating eduroam institutions in that country. That national server forwards the credentials to the home institution B, where they are verified. The 'acknowledge' travels back over the proxy-hierarchy to the visited institution P and the user is granted access.

You can build a mesh network with Ubiquiti or Ruckus or whatever. You pay more. a Unifi is like $90 a node, compared to the $25 you pay for consumer shit. But it allows you to have everything working in concert - adjust the power, hand signals off from WAP to WAP and most importantly, put credentialing and access at one centralized location.

On the other hand, when you open up your Comcast router it has a 2nd network built in, on the same frequencies, at the same power, as your own personal SSID. The only thing Comcast has control over is whether or not your credentials let you on.

It matters a lot less when things are well-spaced but when they aren't, look out.

raisin  ·  423 days ago  ·  link  ·  

Yeah, I'm curious about this as well, currently on eduroam wi-fi with no problems.