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Captive Portal on WiFi that doesn't have a Captive Portal. 0 Recommended Answers 13 Replies 19 Upvotes
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We started getting reports that kids' Chromebooks are getting a pop-up that they need to visit the network's sign-in page. The problem is that we do not have a Captive Portal for the SSID that the Chromebooks connect to and they won't have an internet connection. When they bring the Chromebook down to us the problem fixes itself but might say it again when they go back to class. This started happening around the time we allowed the Chromebooks to update to OS 88 and we thought it was a bug with that version so we went to OS 89 and it is still happening. If the kids click the link to visit the network's sign-in page it takes them to gstatic.com/generate_204 and nothing loads. I can replicate the problem by taking a Chromebook and walking around the building and then I'll get the pop-up to visit the network's sign-in page. When I get the pop-up I ran the chrome connectivity diagnostics and got back DNS error but the DNS server is fine. I have tried to set the DNS to 8.8.8.8 8.8.4.4 and 9.9.9.9 for the Chromebooks but that still didn't work. I don't think this is a network problem as this is only affecting Chromebooks and not phones and laptops. If I roll back the update to OS 86 the problem goes away. Any Chromebook that's still on 86 has no problem. I would roll back the update on them but there are about 200-300 Chromebooks.  Any thoughts too what is going on here? Is there something new with the OS 88/89 that I can change in google admin to fix this?
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Hi Paul,
 
Thanks for stopping by the Chrome Enterprise Help Community!
 
You seem to have filed a bug in Chromium regarding this problem. Meanwhile, I'd suggest you visit the following article which details on setting up networks for managed devices. Please make sure that the network settings for Chrome OS devices are configured accordingly.
 
Best,
Brad
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Exact same issue here.
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Brad, I have seen that article and made a few wifi changes and we are still having the problem. Side note with this problem we got a call from a teacher yesterday saying a kid was having this problem at home with one of the T-Mobile hotspots that we give out for virtual students.
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We are still having problems and because this starting to snowball we are wiping the Chromebooks one by one about 300-400 and putting ChromeOS 86 back on them. If there a way to mass roll back the updates that would be great and help would be appreciated.
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I am having the same issue.  500 Chromebooks.  Many unable to connect.
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Same issue here and my Wi-Fi settings have been checked.
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same here cromebook think its connected to an SSID with captive Portal and can't connect.
my users drives crazy hwo can it be solved ?  is there a way to disable the captive portal check ?
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Yes , I am experiencing the same problem
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Same problem here. I might be able to add a little insight for someone who is (hopefully) working on this. I recently installed Chrome OS ver. 89 on an old MS Surface Pro 3, and this problem cropped up. I don't think it was there from the very beginning, but it might have been. 

I get a good connection each time when I reboot, but any time the device sleeps, it comes up with the Captive Port blank screen. This only happens with sleeping, whether by timing out or from closing the cover. If it is left on power and the screen blanks but does not sleep, the connection stays fine. 

I get the same behavior on my home network (no captive port there) and at work, where I have to authenticate, but no captive port. 

I am new to Chromebooks, but love the OS when it can connect. It's very snappy, making my SP3 seem like new again. Is there a way to check for OS updates or to roll back to an older version from within Chrome OS? Again, ignorance, since this is a new configuration for me.
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IT consultant here. (20 plus years Tech Support experience) - I am experiencing the same problem with a customer student client as well using the latest build 90.x (various WiFi locations) Please note taking the laptop to a random office building with WiFi connected happened to work perfectly fine NO ISSUES with any desired websites. BUT travel back home or school and problem occurs with limited access.(gmail, google.com, all google sites/apps work) - Please note Windows PCs and all Apple devices (iPhones, iPads, Macs) all connect fine and can browse internet without restrictions on suppo-sed problem networks where Chromebook fails. - 

Connection to Wi-Fi network router is strong and established on the Chromebook BUT only access is allowed and is selective to certain websites. Very strange correct?

One very interesting observation is we cannot reach the school website BUT here is something I'd like to survey you all about. 

Can you test your users for access to iPV6 only sites?

My observation is that the Chromebook can access ipv6 perfectly fine!

Is this a protocol bug on IPV4 in-combo with post Chromebook Build 86 with certain types/brands of routers???

IPV6 compliant websites seem to work without issue.

Let me know guys if your devices can access for example the following sites after establishing a network connection.

Just as a test Do these specific sites load???
  • CNN.com
  • Google.com
  • YouTube.com
  • Facebook.com
  • Baidu.com
  • Wikipedia.org
  • Yahoo.com
  • Amazon.com

HELP!
Thanks,
IT Guy
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One more bit of information: if I "sign out" instead of letting the computer sleep, it does not exhibit the "captive portal" problem or message. It really seems to be something about the sleep state, at least on my computer.
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Same issue. This must have been caused by a chrome OS update as this was working fine in the past against an otherwise unchanged wifi setup. Of all 7 wifi devices on this wifi setup, only the chromebook exhibits this bug.

Chrome OS WIFI broken, google needs to fix this asap.
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I tried accessing the list of IPV6 sites and was unable to do so. I'm running Chrome OS 89 on a surface pro 6. Everything is working wonderfully.
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