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Hi. Anyone ever had the problem on Fat Clients in a 2 NIC setup where Google Chrome is unable to go to any web site even google.com?
can other programs have internet access?
Firefox has no problems getting to any page.
probably google trying to phone home and failing for some odd reason
wild speculation :)
what error does chrome give?
And it's strange, it can be working fine for a student and after 10 minutes the problem arises. I'll post a screen shot...
I bet! hadn't though of that...
Just a bit, I'll post the screen shot...
is your NAT firewalling very permissive, or does it restrict any ports, etc. ?
good point too, I'll check on that...
but... what's the recommended site for sharing images here?
(BTW, howdy @vagrantc !)
pick your favorite
|20:37||* vagrantc waves|
|20:37||* alkisg waves There's also the new kid on the block, called "DNS over HTTPS", check if either of those browsers has it enabled|
not sure there is one... imgur is probably fine if you're fine with it being on imgur ;)
dns over https ... wow.
ok! I'll check imgur out, not familiar w/it
ah yes, I thought google was going to force it to their own servers in chrome
(and hi @alkisg and @mwalters too!)
although, I think firefox is investigating doing the same, but with a more "open process" regarding which dns servers
...somehow ended up with cloudflare's I think?
I've tested firefox's, it works fine with cloudflare
I suspect a janky 2nic config
but that probably doesn't make sense if it's happening on the client... dunno
And if you open a terminal right there, does ping google.com work?
@alkisg, I can check the last ping check idea, I'll have to check how to check if the browsers have "DNS over HTTPS" enabled. I will have to search for a client that has this chrome problem at the moment (thanks to some students who didn't log out :-)
--- google.com ping statistics ---
5 packets transmitted, 5 received, 0% packet loss, time 4005ms
rtt min/avg/max/mdev = 11.556/19.795/31.538/7.255 ms
No IP there?
Is it safesearch?
there? I did the ping in terminal
Oh I meant that you would paste the google.com ip here so that we see if your organization has google safesearch enabled or not
Anyways, need to leave, sorry!
|20:49||* alkisg waves again :)|
:-) Thanks and Bye!
but, not a filter issue, the same site is reachable w/firefox.
But, this sparked idea and I see the problem is ONLY with google.com!
I type in a google search for "dog" and I get the dns error.
I type dog.com and it goes immediately to the site!
wow, chrome only blocking google. AWESOME!
"we detected a large amount of unsolicited advertizing very disturbingly tuned to your particular profile... and decided to block it"
I wonder, is it possible that it appears to google.com that all the traffic coming from my classroom is from a single computer?
Here's the error message:
www.google.comâs server IP address could not be found.
if you're using NAT, definitely.
that's what NAT does
ummmm www.google.com's server IP address could not be found.
I am (2 NIC setup)
I've had this problem, occasionally, over the last 6+ years.
But it never happens on the teacher computer, only clients
could you plug a laptop into the client network and see if it happens to them too?
e.g. using the same NAT, but not the same configuration
sure, I'll try right now. It doesn't always happen but let's see...
could also be some sort of DNS proxy caching error?
are you using dnsmasq? does it have multiple upstream DNS servers configured, and are they both working?
something like that, maybe
I am using dnsmasq. Would I check this in network manager on the teacher computer?
not sure off the top of my head to check how dnsmasq is configured
e.g. it might be running and only serving up dns to the clients and not the teacher compuer
I just went to network manager. The internet-facing NIC has 2 dns servers, an internal to our district IP and 188.8.131.52
I'm going to check on a client...
i think dnsmasq will query both dns servers and use whichever it gets the first response from, and then possibly cache that for a while ... which could explain why it sometimes works for some machines
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So, I wonder which is more likely to be causing this particular problem? I'll try using just 1 at a time...
If I restart networking (sudo service networking restart?) on the server after changing the dns entries in nm on the teacher client, I wonder if it will mess things up with connecting to the clients?
is there a better way to test?
Also, service restart networking OR systemctl restart networking?
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or... sudo systemctl restart networking.service (I'll try when students in after school study have left :-)
dgroos: either work, "service" basically just calls the appropriate systemctl command when running systemd
and it's certainly easier to type...
I would like to know about sombebody use Linux Mint? I am trying do other ltsp server with Mint. But when client up, it show uncompressor error or stop at check after ipxe part and stop in this part
Ah, thanks @vagrantc
so what do you thing about Mint (last version 19.3 64 bits)
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