First, find out whether File Threat Protection actually slows down the computer (or a program): Find the computer that works slowly Disable the policy on it Stop (disable) File Threat Protection Check whether the computer (program) works any faster Even if programs work faster on the computer without File Threat Protection, do not leave File Threat Protection disabled. Analyse the certificate and select Confirm Security Exception if you are sure that the site can be trusted.ĭone! If you have any questions, please contact our managers.Hey Just for me: Why do you use KES on your file server and not Kaspersky Security for Windows Server? Last one is also included in any KESB license.On the warning page, select Advanced item.In this case, an invalid certificate indicates the risk of interception of your connection by third parties. How to solve the problem for a separate siteĪttention: we strongly recommend that you DO NOT make an exception for well-known sites (Facebook, Google, etc.) or sites where financial transactions take place. Such certificates generate an ERROR_SELF_SIGNED_CERT error in Firefox. In this case, the problem is solved by restoring the full certificate chain. The site administrators had to re-issue their Symantec SSL certificates to DigiCert with Digicert roots. In this case, the warning MOZILLA_PKIX_ERROR_ADDITIONAL_POLICY_CONSTRAINT_FAILED (or SEC_ERROR_UNKNOWN_ISSUER) is displayed. Starting with Firefox 63, all Symantec certificates (as well as GeoTrust, RapidSSL, Thawte) automatically lost trust in Mozilla. The certificate is issued by a certification authority owned by Symantec. Below we will look at some common reasons for this: If the warning appears only on one particular site, then this indicates that the web server has the wrong settings. Corporate traffic filtering / monitoring solutions (contact your IT department to solve this problem).What other reasons may lead to errors "SEC_ERROR_UNKNOWN_ISSUER" or "MOZILLA_PKIX_ERROR_MITM_DETECTED": Other antiviruses should have similar options. Restart the system for the changes to take effect.If you are using a version of Kaspersky 2015, then untick “Scan encrypted connections”. If you are using a version of Kaspersky 2016, then in the section “Encrypted connections scanning” select the item “Do not scan encrypted connections”.Select Settings in the bottom-left corner.In Bitdefender 2015 go to the Protection section.ĭisabling interception of secure connections in Kaspersky is as follows: In Bitdefender 2016, go to the Modules section.In Bitdefender, you can disable the interception of secure connections as follows: Go to Menu> Settings> Components and select Customise.Interception of secure connections in Avast can be disabled using the following steps: There are also solutions for individual antiviruses: If the error was caused by the antivirus, the general solution is as follows: you need to reinstall the antivirus software so that Firefox automatically inserts its security certificates into own certificate store. Malicious software that performs certificate spoofing.Antivirus and security scanners that analyze encrypted connections.If the MOZILLA_PKIX_ERROR_MITM_DETECTED error occurs on different HTTPS sites that are not related to each other, this could mean that your connection is being intercepted by a proxy server. 1) Warning pops up on different HTTPS sites Let's look at both cases, because the causes and ways to get rid of the warning will vary. One of two things might happen: this warning appears on a variety of HTTPS sites or this warning only pops up on one specific site. If you see an error page with the message "SEC_ERROR_UNKNOWN_ISSUER" or "MOZILLA_PKIX_ERROR_MITM_DETECTED", this means that the certificate was issued by a certification authority unknown to Firefox. In this article, we will review the following error codes: SEC_ERROR_UNKNOWN_ISSUER, MOZILLA_PKIX_ERROR_MITM_DETECTED, ERROR_SELF_SIGNED_CERT. If Firefox cannot verify the authenticity of a certificate, it will display the page “Your connection is not secure” with an error code.
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