Avast For Mac Web Shield Blocking All Internet Access

| 25-04-2021
[RAND-1-100] Comments

Avast Free Mac Security [Download]. Our Web Shield and Mail Shield combine to check the vast majority of incoming data from the Internet, while File Shield scans all programs stored and executed from your hard drive. Everything is packed in a brand new GUI. Ransomware Shield. Block ransomware and other untrusted apps from changing, deleting, or encrypting your personal photos and files. All your Avast-protected devices in one handy place. Manage your licenses, locate your mobile devices, and stay super-organised the easy way. Avast Internet Security is built upon multiple layers of. In any case, we have checked Web Shields, which as far as I know is the 'firewall' in Avast. It does stick upon reboot, but that's why you see temporary access at first; it just hasn't loaded yet and when it does, you lose the ability to browse. How to Stop Avast from Blocking Websites If Avast blocks website, you wish to access then follow the steps that are mentioned below to prevent Avast from using that website’s content. But always remember, don’t ever try to use those sites which avast web shield has blocked access before ensuring them because it may contain malicious.

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Avast Web Shield Blocking Access To Websites

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AVG personal for OSX. As of today, after a definition update, AVG Web Shield began blocking ALL https sites that I attempted to visit and I am not allowed to accept the certificate. Gmail/google, amazon, even avg itself. It appears to be an issue with AVG inspecting the cert chain. This is rendering my browser unusable. Therefore web shield is deactivated until this is resolved.

www.avg.com uses an invalid security certificate. The certificate is not trusted because the issuer certificate is unknown. The server might not be sending the appropriate intermediate certificates. An additional root certificate may need to be imported. Error code: SEC_ERROR_UNKNOWN_ISSUER

  • February 3, 2018
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Karthikeyan(Avast)
Hello Customer,
I understand your concern on this recent update from AVG causing browsers to https sites. Please follow the below steps and check if that fix the issue.
Firstly, it is necessary to obtain a copy of the certificate.
This can be found with Keychain Access with Keychain 'login' and category 'Certificates'. Search for 'avg'. You should find 'AVG trusted CA'. Select it and export it from the menu bar under 'File' then 'Export Items...'. Save it somewhere accessible.
Next, the certificate needs to be added to Firefox's certificate manager.
Open Firefox's Preferences > Privacy & Security tab. Scroll down to Security > Certificates. Open 'View Certificates...'. Click on 'Authorities' then 'Import...'. Import 'AVG trusted CA' and trust it to 'identify websites'. You can select 'identify mail users' if you want.
If you face any difficulties, feel free to contact us.
  • February 3, 2018
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first name last name
Um...no. You are blocking EVERY https site I've attempted to go to. I've tried enough that I feel safe in concluding that you are blocking ALL certificates...EVEN YOUR OWN. You actually expect me to import certs for every site I wan to visit? That's your workaround? .........REALLY?
If you can't work with Firefox's code to trust even your own certificate chain then you have clearly done something wrong. Avast is working great and doesn't break my browser. See ya.
  • February 3, 2018
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Balasubramanian(Avast)
Hello,
I understand this must be upsetting and forwarded the concern to senior team for getting suggestion.
Keep checking this post to know about the status. Your patience is much appreciated.
  • February 3, 2018
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Alok Kumar(Avast)
Hello,
I'm sorry for any inconvenience caused. We have released an AVG Antivirus new update (18.2) yesterday, so I request you to check if your AVG Antivirus for Mac is up to date.
1) In the menu bar, click on the AVG AntiVirus
2) Select Check for updates. The current update status (updated/outdated) is displayed in the top right corner of the main page of AVG AntiVirus, so there two variants that you might see.
3) Click the Update Now button to launch the update process.
To find out the date of the last successful update proceed with the following:
1. In the task bar, click on the AVG Antivirus Menu.
2. Select About AVG AntiVirus.
3. Look for the line Last update.
If it shows 18.2 version installed then check for websites issue and keep us informed about the status.
Best regards,
Alok.
  • February 8, 2018
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Forrest Purser
Same issue. Problem happened after update. Cannot use firefox with web protection turned on. This is an avg problem and not a cert issue.
  • February 12, 2018
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Forrest Purser
Version 18.2 -- auto upgraded this morning and is whats causing the issue.
  • February 12, 2018
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Tony D
I'm having the same issue as Forrest, AVG updated to 18.2 this morning, and now FF can not access any SSL sites! This is a critical bug on AVG's software. When will this be corrected??
  • February 12, 2018
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Bhuvaneswari Vairavan(Avast)
Hello Tony,
I apologize for the inconvenience. Please reinstall AVG Antivirus on your MAC device and check the status. If you face any issues, then we need to collect logs and FF version. Also, if you have included any extensions to it to escalate the case.
  • February 13, 2018
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Forrest Purser
  • February 13, 2018
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Tony D
Bhuvaneswari Vairavan,
I've already uninstalled and reinstalled AVG Antivirus, that didn't help. The problem started for me, and many other users, when we recivied updates to version 18.2 over the last few days. Something within that package needs to be corrected on your end. I'm running the latest version of Firefox, 58.0.2.
  • February 13, 2018
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Bhuvaneswari Vairavan(Avast)
I appreciate your efforts and patience so far, Tony.
To analyze the issue further, I need to submit your concern to our senior technicians along with other diagnostic logs. I have sent you an email with steps on how to collect and upload the data required for analyzing your issue. Please check your inbox and spam/junk folder as well.
  • February 13, 2018
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Tony D
I'm not sending all those log files, that's crazy. Several people so far have told you what the problem is with what version of your software. You should be able to set this up on a test machine and see the problem, and have all the logs you want.
  • February 13, 2018
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Akash Chanda(Avast)
Hi Tony,
Yes, we do have the AVG Logs and we've already forwarded them to our Senior Team to analyze the issue. Please be patient while our Senior Team finds a resolution for the issue.
  • February 13, 2018
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Damyan Hristov
So is there a solution to this problem or it was swept under the rug as noone has posted in more than 2 months? Cuz the issue is still there and it's quite annoying having to restart the PC every time it happens.
  • April 27, 2018
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Ranjani Bakthavachalam(Avast)
Damyan,
Are you receiving this error on Windows or Mac? Let us know the name & version of browser you have used and AVG version to check and assist you further.
  • April 27, 2018
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Damyan Hristov

Win 10 Home Edition, Mozilla Firefox version 59.0.2, AVG 180430-0 (Microsoft Edge has no issues). The problem occurs occasionally on all https sites. For some reason restarting the PC resolves it but only temporarily. I have attempted to re-install both the browser and AVG and the issue still persists.

In case you need a bit more info on the problem:

'The owner of www.facebook.com has configured their web site improperly. To protect your information from being stolen, Firefox has not connected to this web site.
This site uses HTTP Strict Transport Security (HSTS) to specify that Firefox only connect to it securely. As a result, it is not possible to add an exception for this certificate.'

One thing that I found useful is allowing AVG Web/Mail Shield Root to identify web sites and mail users from the settings in Firefox but that only fixes some of the websites.

  • April 30, 2018
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Karthikeyan(Avast)
Damyan, thank you for the detailed information.
To analyse this issue further, I have sent you an email to get connected with our advanced support. Follow the steps from the email and the concerned team will fix this firewall issue for you.
  • April 30, 2018
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Guy Martin
I am having the same issue with Firefox. Completely unusable on any HTTPS site.
'Your connection is not secure
The owner of accounts.google.com has configured their website improperly. To protect your information from being stolen, Firefox has not connected to this website.
This site uses HTTP Strict Transport Security (HSTS) to specify that Firefox may only connect to it securely. As a result, it is not possible to add an exception for this certificate.'
On looking at the certificate, it is blocked by AVG.
I am on Windows 10 Home, version 1803, Build 17134.1
AVG version 18.3.3051.
Clearly this has been happening for some time. Guys, can we have a fix please?
  • May 3, 2018
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Web Security Guard

Guy Martin
Turning off Web shield solves the issue, but of course it leaves one rather exposed.
  • May 3, 2018
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Alok Kumar(Avast)
Hello Guy,
We’re happy to help you sort this out. May I know if you're using AVG Internet Security for computer protection or AVG Free Antivirus?
I also request you to share a screenshot of the error message to assist you further.
You can post the screenshot here on your topic. Click on 'Answer' & then click on the 'Image' [mountain symbol] & follow the instructions.
Best regards,
Alok.
  • May 4, 2018
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George Thompson
I tried to upload 2 images - Insecure connection and my system info but alas, neither seem to have been uploaded.
  • May 30, 2018
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George Thompson
I am having the same issue - started a few days ago. I ended upswitching off all AVG protection, tried the internet and was successful. Web site access was OK for a few days but again, while surfing, I suddenly was hit with the problem again. As said above by Guy Martin, switching off the web shield allows access to the websites but leaves the computer vunerable.
To write this post, I have to have web shield off.
Firefox 60.01 (64 bit version) up to date
Windows 10 up to date
  • May 30, 2018
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Alok Kumar(Avast)
Hello George,
We can certainly take a look into this. May I know if you're using AVG Free Antivirus or AVG Internet Security for your computer protection?
Regards,
Alok.
  • May 30, 2018
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George Thompson
I have AVG Internet Security and again, I am running with Web Shield deactivated in order to reply. And please do not give me complicated instructions as posted by Karthikeyan in the second post in this discussion, That is way outside my capabilities.
Regards
George
(I will be away until next Monday)
  • May 31, 2018
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Abirami Shanmugam(Avast)
George,
Thank you for the confirmation. Please uninstall and reinstall AVG webshield component by going to AVG Internet Security->Menu->Settings->Component->down arrow next to Webshield component->Uninstall component. Then reinstall it and check if it works.
  • May 31, 2018
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George Thompson
Thanks for the very quickreply.
I have done as you requested and all seems to be well - for the moment.
Thanks
George
  • May 31, 2018
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Abirami Shanmugam(Avast)
Excellent George!
We are glad to know that your issue is resolved.
Feel free to contact for any assistance with AVG.
Have a nice day!
  • May 31, 2018
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