Author Topic: Avast Free Mac Security Web Shield Blocking HTTPS Sites on Domain  (Read 2641 times)

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I have installed Avast Free Mac Security onto my laptop, and I noticed that Web Shield blocks sites using HTTPS on the domain. This issue appears to only occur on the Mac client, with us unable to replicate it with the Windows client. Sites affected include,, and, among others. While whitelisting the specific servers or disabling Web Shield would work, I was wondering if this issue could be fixed on Avast's end. Also, is there a workaround that will allow us to unblock the entire * domain, or will we have to continue unblocking sites individually? Lastly, where might the log files be located for the Web Shield?

If there is any other piece of information that you need from us, please let me know and I'll be happy to provide it.
« Last Edit: March 10, 2015, 09:56:58 PM by nickpeoples »

Offline tumic

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The server apparently can not handle SSL requests correctly. The Avast web shield
is using OpenSSL (1.0.1) for the HTTPS requests equivalent to the following s_client command:
Code: [Select]
openssl s_client -connect -servername -no_ssl3which also fails.

All Avast components use syslog for logging so you can find the webshield log entries in your system
log file.