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Error code: SEC_ERROR_UNKNOWN_ISSUER

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No matter which website I try recently I keep getting "Your connection is not secure" and Error code: SEC_ERROR_UNKNOWN_ISSUER Other web browsers work fine. I tried disabling Avira and have Firefox in my list of Windows firewall exceptions but the problem was not solved. Below is a dump of the error messages. Let me know what I can do to fix this issue once and for all. I am running Windows 10 and using Firefox 60.0.1 (64-bit)

www.google.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

https://www.google.com/

Peer’s Certificate issuer is not recognized.

HTTP Strict Transport Security: false HTTP Public Key Pinning: true

Certificate chain:


BEGIN CERTIFICATE-----

MIIDRzCCAi+gAwIBAgIEWxB1+TANBgkqhkiG9w0BAQsFADB2MQswCQYDVQQGEwJV UzEbMBkGA1UECgwSQ29udGVudFdhdGNoLCBJbmMuMSswKQYDVQQDDCJDb250ZW50 V2F0Y2ggQ2VydGlmaWNhdGUgQXV0aG9yaXR5MR0wGwYDVQQLDBR3d3cuY29udGVu dHdhdGNoLmNvbTAeFw0xODA1MTUyMDQwMjRaFw0xODA4MDcxOTUzMDBaMGgxCzAJ BgNVBAYTAlVTMRMwEQYDVQQIDApDYWxpZm9ybmlhMRYwFAYDVQQHDA1Nb3VudGFp biBWaWV3MRMwEQYDVQQKDApHb29nbGUgTExDMRcwFQYDVQQDDA53d3cuZ29vZ2xl LmNvbTCBnzANBgkqhkiG9w0BAQEFAAOBjQAwgYkCgYEAwsXbrGozZwzGB1QVGP6N Nykl5GScJBVgMG/kUpJc6+koC+wu4+b2RNwMIHd42I8HS/84nf0NNMooc3yOM1Kh gexXGDKDa0eMCTMWs0fobNH6tYTJr1TQbYM9aK3vpdCqDJs3G7gE/1cH7hY5MGgv 2lZLxeoKFag7DzfGGavU1tMCAwEAAaNvMG0wEwYDVR0lBAwwCgYIKwYBBQUHAwEw DgYDVR0PAQH/BAQDAgeAMBkGA1UdEQQSMBCCDnd3dy5nb29nbGUuY29tMB0GA1Ud DgQWBBRiz5xdwnstoQ+lsGNLtCfI3OH14DAMBgNVHRMBAf8EAjAAMA0GCSqGSIb3 DQEBCwUAA4IBAQBYdNDKthe3FAk44Rsq5rr3qJ28v0O1vj7FAUTAPvI9WGf6QsHp yxZjgHgrVi8Vnncp99Os3sOxm7NKAC1I8caUHs1Y0BNaInPcokq/154P8LG2IIiy iuzeB9Rjku7KlZAujSNJmkdo2lGvaCwjyxka6I2/wzcHXrdq/ee2tEBsShTD7GYs qwdqvgUV/+AIQ0ioe2xyrypNSxb7wAUv+exRW9zUtie7h7Of2SoSlPuroHsejK9Y R2a1ZZKqXMDMyeZ3Nz2g00Wz9c96ruRRz7DjX6wQhIV1gLsm3yOavcA2l/TzuR4x 55P2g+nXPeVsAW2/R68E6Z70Zt87Mqx+KNWD


END CERTIFICATE-----
BEGIN CERTIFICATE-----

MIIEKzCCAxOgAwIBAgIEV0+ulDANBgkqhkiG9w0BAQsFADB2MQswCQYDVQQGEwJV UzEbMBkGA1UECgwSQ29udGVudFdhdGNoLCBJbmMuMSswKQYDVQQDDCJDb250ZW50 V2F0Y2ggQ2VydGlmaWNhdGUgQXV0aG9yaXR5MR0wGwYDVQQLDBR3d3cuY29udGVu dHdhdGNoLmNvbTAeFw0xNjA2MDIwMzU3MDhaFw0yNjA1MzEwMzU3MDhaMHYxCzAJ BgNVBAYTAlVTMRswGQYDVQQKDBJDb250ZW50V2F0Y2gsIEluYy4xKzApBgNVBAMM IkNvbnRlbnRXYXRjaCBDZXJ0aWZpY2F0ZSBBdXRob3JpdHkxHTAbBgNVBAsMFHd3 dy5jb250ZW50d2F0Y2guY29tMIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKC AQEAuEsAnD8pG0iLVFHRk/nYuSbo5zpQd4laQE+O+r/u/wG7WZxuFb6V+20PM9lZ aHxFe8LdtUd5Cexukc5mZUiK/8WkJ8tZYi/lGm2U9DDChiliZIg/bHey1Qknl8AZ J+pPR48/u50LRoMmCz3xwZAVZ4VFSuZF9gd1lRA2bEgz1vN1CBcyQzO6uBKndFA/ KHGnfYbU558Xv0qpTThKeuvpAr5ZfEy2/EMc6N1IUyVXyW7S2Huhdz9nybRPLkfz zU1gAMh9rF7Upr88Ps4vo6OEd6F7evTzT+0qyocup38JuU+85qXOy0Z5WX6nAnbu SRzJOAPn8/2UlkBnvHhmGt8dvQIDAQABo4HAMIG9MB0GA1UdDgQWBBQaHCKd3NSd P4iX8W/CXorLidrHEDAfBgNVHSMEGDAWgBQaHCKd3NSdP4iX8W/CXorLidrHEDAS BgNVHRMBAf8ECDAGAQH/AgEAMAsGA1UdDwQEAwIBrjAxBglghkgBhvhCAQ0EJBYi Q29udGVudFdhdGNoIENlcnRpZmljYXRlIEF1dGhvcml0eTAnBgNVHSUEIDAeBggr BgEFBQcDAQYIKwYBBQUHAwIGCCsGAQUFBwMEMA0GCSqGSIb3DQEBCwUAA4IBAQAY Y2OEF0wHtPaY97IojtXlcysMdweoseL+tLpF0T+oNBg19tlVVa+hNhfgmhGYBJKh 3hAfYemtWTn/fokzCK6t7EMF8uhGFhL/lB4q1KZwBi9aFASxAlbPktaFv1FJUOWK 5xOZ03leGUPapVI+cT3PI5bWyIb/8O9OZP0d+SVNRfnSBTDzyKQMdrGJreG+DTSd IRqcOTbAkb8VXdoJfAGHhdTbcAnVzVDcxMLdM14zQUsHGHTPnIeS2k/A4HAER0iT ugU0Lu8LlUK70tdVoUH5x91VWSlF6rtQP76cRZxRJx/3zp4QYFQqB+L0l3sxS6YS mL7lWHKPZsD5YtJF2kYe


END CERTIFICATE-----
No matter which website I try recently I keep getting "Your connection is not secure" and Error code: SEC_ERROR_UNKNOWN_ISSUER Other web browsers work fine. I tried disabling Avira and have Firefox in my list of Windows firewall exceptions but the problem was not solved. Below is a dump of the error messages. Let me know what I can do to fix this issue once and for all. I am running Windows 10 and using Firefox 60.0.1 (64-bit) www.google.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 https://www.google.com/ Peer’s Certificate issuer is not recognized. HTTP Strict Transport Security: false HTTP Public Key Pinning: true Certificate chain: -----BEGIN CERTIFICATE----- MIIDRzCCAi+gAwIBAgIEWxB1+TANBgkqhkiG9w0BAQsFADB2MQswCQYDVQQGEwJV UzEbMBkGA1UECgwSQ29udGVudFdhdGNoLCBJbmMuMSswKQYDVQQDDCJDb250ZW50 V2F0Y2ggQ2VydGlmaWNhdGUgQXV0aG9yaXR5MR0wGwYDVQQLDBR3d3cuY29udGVu dHdhdGNoLmNvbTAeFw0xODA1MTUyMDQwMjRaFw0xODA4MDcxOTUzMDBaMGgxCzAJ BgNVBAYTAlVTMRMwEQYDVQQIDApDYWxpZm9ybmlhMRYwFAYDVQQHDA1Nb3VudGFp biBWaWV3MRMwEQYDVQQKDApHb29nbGUgTExDMRcwFQYDVQQDDA53d3cuZ29vZ2xl LmNvbTCBnzANBgkqhkiG9w0BAQEFAAOBjQAwgYkCgYEAwsXbrGozZwzGB1QVGP6N Nykl5GScJBVgMG/kUpJc6+koC+wu4+b2RNwMIHd42I8HS/84nf0NNMooc3yOM1Kh gexXGDKDa0eMCTMWs0fobNH6tYTJr1TQbYM9aK3vpdCqDJs3G7gE/1cH7hY5MGgv 2lZLxeoKFag7DzfGGavU1tMCAwEAAaNvMG0wEwYDVR0lBAwwCgYIKwYBBQUHAwEw DgYDVR0PAQH/BAQDAgeAMBkGA1UdEQQSMBCCDnd3dy5nb29nbGUuY29tMB0GA1Ud DgQWBBRiz5xdwnstoQ+lsGNLtCfI3OH14DAMBgNVHRMBAf8EAjAAMA0GCSqGSIb3 DQEBCwUAA4IBAQBYdNDKthe3FAk44Rsq5rr3qJ28v0O1vj7FAUTAPvI9WGf6QsHp yxZjgHgrVi8Vnncp99Os3sOxm7NKAC1I8caUHs1Y0BNaInPcokq/154P8LG2IIiy iuzeB9Rjku7KlZAujSNJmkdo2lGvaCwjyxka6I2/wzcHXrdq/ee2tEBsShTD7GYs qwdqvgUV/+AIQ0ioe2xyrypNSxb7wAUv+exRW9zUtie7h7Of2SoSlPuroHsejK9Y R2a1ZZKqXMDMyeZ3Nz2g00Wz9c96ruRRz7DjX6wQhIV1gLsm3yOavcA2l/TzuR4x 55P2g+nXPeVsAW2/R68E6Z70Zt87Mqx+KNWD -----END CERTIFICATE----- -----BEGIN CERTIFICATE----- MIIEKzCCAxOgAwIBAgIEV0+ulDANBgkqhkiG9w0BAQsFADB2MQswCQYDVQQGEwJV UzEbMBkGA1UECgwSQ29udGVudFdhdGNoLCBJbmMuMSswKQYDVQQDDCJDb250ZW50 V2F0Y2ggQ2VydGlmaWNhdGUgQXV0aG9yaXR5MR0wGwYDVQQLDBR3d3cuY29udGVu dHdhdGNoLmNvbTAeFw0xNjA2MDIwMzU3MDhaFw0yNjA1MzEwMzU3MDhaMHYxCzAJ BgNVBAYTAlVTMRswGQYDVQQKDBJDb250ZW50V2F0Y2gsIEluYy4xKzApBgNVBAMM IkNvbnRlbnRXYXRjaCBDZXJ0aWZpY2F0ZSBBdXRob3JpdHkxHTAbBgNVBAsMFHd3 dy5jb250ZW50d2F0Y2guY29tMIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKC AQEAuEsAnD8pG0iLVFHRk/nYuSbo5zpQd4laQE+O+r/u/wG7WZxuFb6V+20PM9lZ aHxFe8LdtUd5Cexukc5mZUiK/8WkJ8tZYi/lGm2U9DDChiliZIg/bHey1Qknl8AZ J+pPR48/u50LRoMmCz3xwZAVZ4VFSuZF9gd1lRA2bEgz1vN1CBcyQzO6uBKndFA/ KHGnfYbU558Xv0qpTThKeuvpAr5ZfEy2/EMc6N1IUyVXyW7S2Huhdz9nybRPLkfz zU1gAMh9rF7Upr88Ps4vo6OEd6F7evTzT+0qyocup38JuU+85qXOy0Z5WX6nAnbu SRzJOAPn8/2UlkBnvHhmGt8dvQIDAQABo4HAMIG9MB0GA1UdDgQWBBQaHCKd3NSd P4iX8W/CXorLidrHEDAfBgNVHSMEGDAWgBQaHCKd3NSdP4iX8W/CXorLidrHEDAS BgNVHRMBAf8ECDAGAQH/AgEAMAsGA1UdDwQEAwIBrjAxBglghkgBhvhCAQ0EJBYi Q29udGVudFdhdGNoIENlcnRpZmljYXRlIEF1dGhvcml0eTAnBgNVHSUEIDAeBggr BgEFBQcDAQYIKwYBBQUHAwIGCCsGAQUFBwMEMA0GCSqGSIb3DQEBCwUAA4IBAQAY Y2OEF0wHtPaY97IojtXlcysMdweoseL+tLpF0T+oNBg19tlVVa+hNhfgmhGYBJKh 3hAfYemtWTn/fokzCK6t7EMF8uhGFhL/lB4q1KZwBi9aFASxAlbPktaFv1FJUOWK 5xOZ03leGUPapVI+cT3PI5bWyIb/8O9OZP0d+SVNRfnSBTDzyKQMdrGJreG+DTSd IRqcOTbAkb8VXdoJfAGHhdTbcAnVzVDcxMLdM14zQUsHGHTPnIeS2k/A4HAER0iT ugU0Lu8LlUK70tdVoUH5x91VWSlF6rtQP76cRZxRJx/3zp4QYFQqB+L0l3sxS6YS mL7lWHKPZsD5YtJF2kYe -----END CERTIFICATE-----

被選擇的解決方法

philipp said

It looks like your web traffic is intercepted by software on your system/network relating to www.contentwatch.com

Actually, I have NetNanny content filter installed, but when I check Netnanny logs I don't see it blocking anything today

從原來的回覆中察看解決方案 0
Shadow110 1072 個解決方法 14836 個答案

Hi, what extensions are you using please as well what Anti-virus/firewall, security program are you using.  ?? Thank You.

Hi, what extensions are you using please as well what Anti-virus/firewall, security program are you using. ?? Thank You.
FredMcD
  • Top 10 Contributor
4272 個解決方法 59923 個答案

There is security software like Avast, Kaspersky, BitDefender and ESET that intercept secure connections and send their own certificate.

https://support.mozilla.org/en-US/kb/firefox-cant-load-websites-other-browsers-can

https://support.mozilla.org/en-US/kb/firefox-and-other-browsers-cant-load-websites

https://support.mozilla.org/en-US/kb/secure-connection-failed-error-message

https://support.mozilla.org/en-US/kb/connection-untrusted-error-message

http://kb.mozillazine.org/Error_loading_websites


  • uses an invalid security certificate SSL_ERROR_BAD_CERT_DOMAIN
  • configured their website improperly

How to troubleshoot the error code "SEC_ERROR_UNKNOWN_ISSUER" on secure websites https://support.mozilla.org/en-US/kb/troubleshoot-SEC_ERROR_UNKNOWN_ISSUER

There is security software like Avast, Kaspersky, BitDefender and ESET that intercept secure connections and send their own certificate. https://support.mozilla.org/en-US/kb/firefox-cant-load-websites-other-browsers-can https://support.mozilla.org/en-US/kb/firefox-and-other-browsers-cant-load-websites https://support.mozilla.org/en-US/kb/secure-connection-failed-error-message https://support.mozilla.org/en-US/kb/connection-untrusted-error-message http://kb.mozillazine.org/Error_loading_websites *uses an invalid security certificate SSL_ERROR_BAD_CERT_DOMAIN *configured their website improperly How to troubleshoot the error code "SEC_ERROR_UNKNOWN_ISSUER" on secure websites https://support.mozilla.org/en-US/kb/troubleshoot-SEC_ERROR_UNKNOWN_ISSUER

提出問題者

Pkshadow said

Hi, what extensions are you using please as well what Anti-virus/firewall, security program are you using.  ?? Thank You.

Avira Antivirus, Windows Firewall

''Pkshadow [[#answer-1117794|said]]'' <blockquote> Hi, what extensions are you using please as well what Anti-virus/firewall, security program are you using. ?? Thank You. </blockquote> Avira Antivirus, Windows Firewall
philipp
  • Top 25 Contributor
  • Moderator
5324 個解決方法 23509 個答案

It looks like your web traffic is intercepted by software on your system/network relating to www.contentwatch.com

It looks like your web traffic is intercepted by software on your system/network relating to www.contentwatch.com

選擇的解決方法

philipp said

It looks like your web traffic is intercepted by software on your system/network relating to www.contentwatch.com

Actually, I have NetNanny content filter installed, but when I check Netnanny logs I don't see it blocking anything today

''philipp [[#answer-1117841|said]]'' <blockquote> It looks like your web traffic is intercepted by software on your system/network relating to www.contentwatch.com </blockquote> Actually, I have NetNanny content filter installed, but when I check Netnanny logs I don't see it blocking anything today

提出問題者

romrom72 said

philipp said
It looks like your web traffic is intercepted by software on your system/network relating to www.contentwatch.com

Actually, I have NetNanny content filter installed, but when I check Netnanny logs I don't see it blocking anything today. Also, if it is Net nanny then why do the other web browsers work fine on my PC?

''romrom72 [[#answer-1117844|said]]'' <blockquote> ''philipp [[#answer-1117841|said]]'' <blockquote> It looks like your web traffic is intercepted by software on your system/network relating to www.contentwatch.com </blockquote> Actually, I have NetNanny content filter installed, but when I check Netnanny logs I don't see it blocking anything today. Also, if it is Net nanny then why do the other web browsers work fine on my PC? </blockquote>
philipp
  • Top 25 Contributor
  • Moderator
5324 個解決方法 23509 個答案

yes, netnanny belonged to that company till 2016 so that seems a plausible cause - you could try reinstalling or else removing it on the affected machine while firefox is closed. in order to be able to block specific content, it will intercept all network traffic...

yes, netnanny belonged to that company till 2016 so that seems a plausible cause - you could try reinstalling or else removing it on the affected machine while firefox is closed. in order to be able to block specific content, it will intercept all network traffic...

提出問題者

romrom72 said

philipp said
It looks like your web traffic is intercepted by software on your system/network relating to www.contentwatch.com

Actually, I have NetNanny content filter installed, but when I check Netnanny logs I don't see it blocking anything today

I contacted them and they told me how to load their certificate. Thanks.

''romrom72 [[#answer-1117844|said]]'' <blockquote> ''philipp [[#answer-1117841|said]]'' <blockquote> It looks like your web traffic is intercepted by software on your system/network relating to www.contentwatch.com </blockquote> Actually, I have NetNanny content filter installed, but when I check Netnanny logs I don't see it blocking anything today </blockquote> I contacted them and they told me how to load their certificate. Thanks.