<![CDATA[[Solved]HSTS blocking access to many web sites.]]>I use Opera 63.0 with HTTPS installed. My computer is a Mac Mini using OSX 10.11.6 (El Capitan).

Something called HSTS suddenly started blocking access to many web sites today — Thursday, October 3 — with no prior warning or indication or anything. I am now unable to access some of my most important and most frequently accessed sites.
Can anyone help me?

I get this instead:
768f6909-ca38-4afc-99a5-e8d0cb770cc6-image.png

Or I get this:

0615a93b-a59d-4cb9-83e2-06a16e93faac-image.png

]]>https://forums.opera.com/topic/35529/solved-hsts-blocking-access-to-many-web-sitesRSS for NodeSat, 11 Apr 2026 21:44:17 GMTThu, 03 Oct 2019 23:57:24 GMT60<![CDATA[Reply to [Solved]HSTS blocking access to many web sites. on Tue, 08 Oct 2019 03:17:28 GMT]]>Thanks for responding. I wondered about that because of the ereservations.att.com web site that was listed above. The situation has cleared up. If it occurs again, I will go straight to ATT.

]]>https://forums.opera.com/post/183970https://forums.opera.com/post/183970Tue, 08 Oct 2019 03:17:28 GMT<![CDATA[Reply to [Solved]HSTS blocking access to many web sites. on Mon, 07 Oct 2019 03:13:23 GMT]]>@bobamamda-0 AT&T offers some kind of protection service for the internet? Based on the first image, it seems that AT&T is intercepting the internet traffic.

]]>https://forums.opera.com/post/183848https://forums.opera.com/post/183848Mon, 07 Oct 2019 03:13:23 GMT<![CDATA[Reply to [Solved]HSTS blocking access to many web sites. on Mon, 07 Oct 2019 01:24:30 GMT]]>We have DSL with AT&T. We use a router to which a few computers are linked. We don't use a VPN, if that is what you mean by a proxy.

]]>https://forums.opera.com/post/183845https://forums.opera.com/post/183845Mon, 07 Oct 2019 01:24:30 GMT<![CDATA[Reply to [Solved]HSTS blocking access to many web sites. on Sun, 06 Oct 2019 00:51:36 GMT]]>@bobamamda-0 Do you use any kind of proxy to connect to the internet?

]]>https://forums.opera.com/post/183734https://forums.opera.com/post/183734Sun, 06 Oct 2019 00:51:36 GMT<![CDATA[Reply to [Solved]HSTS blocking access to many web sites. on Sun, 06 Oct 2019 00:22:51 GMT]]>@leocg

Thanks for responding.
I use Malwarebytes and Avast.
I received no warning from Avast while I was trying to access any web sites.
When I read you entry here, I ran Malwarebytes and came up clean.
There had been no change in any of my software settings in a long time.

]]>https://forums.opera.com/post/183733https://forums.opera.com/post/183733Sun, 06 Oct 2019 00:22:51 GMT<![CDATA[Reply to [Solved]HSTS blocking access to many web sites. on Sat, 05 Oct 2019 04:23:10 GMT]]>@bobamamda-0 Well, you just waited for a day.

Do you use any antivirus or some other program that intercept your internet traffic?

If I saw the message in the first screen shot, i would have started looking for malware on my computer.

]]>https://forums.opera.com/post/183573https://forums.opera.com/post/183573Sat, 05 Oct 2019 04:23:10 GMT<![CDATA[Reply to [Solved]HSTS blocking access to many web sites. on Sat, 05 Oct 2019 04:18:25 GMT]]>Nobody have any ideas or suggestions?

]]>https://forums.opera.com/post/183572https://forums.opera.com/post/183572Sat, 05 Oct 2019 04:18:25 GMT