![]() The following knowledge base article describes how this is done in policy: Disable Detect Protocol on exception to resolve an issue with SSL interception failure. The following screenshots show the results of the above URL on FireFox 52 with its default configuration:Īnd after following the steps above to disable TLS 1.3 support:įor explicit deployments policy can be added to disable protocol detection for any impacted website. SSL Labs provides a URL which will test and report the TLS versions supported by the browser requesting the URL. ![]() How to confirm if TLS 1.3 is supported by a browser The below image shows the the configuration set to “3”, which is TLS 1.2: TLS 1.3 can be disabled by accessing URL “about:config”, search for, change it from “4”, which is TLS 1.3, to “3”, which is TLS 1.2, and restart the browser. Note: Chrome will use TLS 1.3 by default starting with Chrome version 65. The below image shows the configuration set to TLS 1.2: ![]() ![]() TLS 1.3 can be disabled by accessing URL “chrome://flags/#tls13-variant”, changing the setting from “Default” to “Disabled”, and then relaunching Chrome. Web Security Service (WSS) - March 4, 2017.Symantec recommends that you upgrade to these or later releases to avoid the issue. Fixes for TLS 1.3 interoperability are included in the following releases. ![]()
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