Strange Internet Problem

Newtun

Storage is nice
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Nov 21, 2002
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Virginia
I'm having a perplexing issue on my main Ubuntu PC, in FireFox. For just a couple of web sites (that I know of), mlb.com and nba.com, they take a while, then time out with various error messages. Just now, for NBA.com, "Request Timeout The server timed out while waiting for the browser's request. Reference #2.9ff02217.1599083100.0". And for MLB.com, "Secure Connection Failed An error occurred during a connection to www.mlb.com. The page you are trying to view cannot be shown because the authenticity of the received data could not be verified. Please contact the website owners to inform them of this problem."

Most other web pages open relatively fast on this PC, and NBA.com and MLB.com open fine in my other Ubuntu PC and my Windows PC, here in my office, and in my WiFi connected Chromebook.

I compared the network setups on the two Ubuntu PCs, and they have the same "Default Route" and DNS settings.

Do any of you have suggestions as to how to troubleshoot this problem?

TIA!
 

Chewy509

Wotty wot wot.
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Could be a problem at either end, as I've seen weird problems with some sites load balancer's not directing traffic correctly that cause these sort of issues, or could be stale cookies on the client side giving information that the server doesn't like.

IIRC Firefox has started using DNS over HTTPS in newer releases, and this has been known to cause issues with some larger site as well.

If enabled, try turning off DNS over HTTPS [1], clearing all cookies and cache data, and see how that goes.

Also any plugins installed/enabled that are different between the various PCs?

[1] https://support.mozilla.org/en-US/kb/firefox-dns-over-https
 

Newtun

Storage is nice
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Virginia
Thanks for the response!

Last night, my other Ubuntu PC started doing the same thing.

But today, both web sites load fine on both PCs. Gotta love those intermittent problems. 🤪
 

Handruin

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I thought there was another semi-recent cloudflare outage or DNS issue happening. You may have been hit by that which might cause what you desribed.
 

Handruin

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Also for future troubleshooting, since you're using Ubuntu/Linux, you could remove the web browser from the equation and use curl from the command line on any given website to test the response. You could start with something as basic as getting the website headers to see if there are any errors:

Bash:
curl http://example.com -I
 

Newtun

Storage is nice
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Nov 21, 2002
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Virginia
Good curl-y point, Handruin. (I had tried using the Ubuntu "native" browser, but that app failed to load.)

And I don't want to install the Chrome browser (FireFox is my preference), but I may do so if these issues keep popping up intermittently.

BTW, I did check on the "DNS over HTTPS" setting in FireFox, and it's switched off.

Thanks, all!
 

Handruin

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I hear ya, Firefox is my personal preferences one either windows or linux when I'm browsing. I do use Chrome at work on my Mac and it's fine but still prefer Firefox for personal stuff.
 
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