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I keep getting an error message of "Your connection is not secure" for sites like facbook and twitter. They work fine in other browsers, but not firefox

  • 9 replies
  • 17 have this problem
  • 76 views
  • Last reply by philipp

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On the advanced tab it says "Error code: SEC_ERROR_UNKNOWN_ISSUER". I've done a refresh to Firefox and deleted the cert8.db file. I'm able to get to these sites just fine in other browsers and in Firefox on other computers. Any thoughts?

On the advanced tab it says "Error code: SEC_ERROR_UNKNOWN_ISSUER". I've done a refresh to Firefox and deleted the cert8.db file. I'm able to get to these sites just fine in other browsers and in Firefox on other computers. Any thoughts?

Chosen solution

no, your work is not blocking it, but they are intercepting/monitoring every secure connection you are opening - your firefox isn't properly configured to work with that apparently and therefore gives you an errors, because it cannot validate the "fake" certificates. again, your it department should be able to help out with that

Read this answer in context 👍 1

All Replies (9)

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Hi, sorry to hear you are having a problem; please see if anything here helps - How to troubleshoot security error codes on secure websites.

If your question is resolved by this or another answer, please take a minute to let us know. Thank you!

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I tried that several times before posting on here, no help

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hi, can you give us more information about the error by clicking on the error code, copying the text to the clipboard and then pasting it here into a reply in the forum (as shown in the screenshot).

thank you!

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https://facebook.com/

Peer’s Certificate issuer is not recognized.

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

Certificate chain:

-----BEGIN CERTIFICATE-----
MIIGRzCCBS+gAwIBAgIRAOraTJHvo7NxYHmupnidAwAwDQYJKoZIhvcNAQELBQAw
XTELMAkGA1UEBhMCVVMxCzAJBgNVBAgTAk9IMRMwEQYDVQQHEwpDaW5jaW5uYXRp
MQ4wDAYDVQQKEwVDQ0hNQzELMAkGA1UECxMCSVMxDzANBgNVBAMTBnNzbHJzYTAe
Fw0xNjEyMDkwMDAwMDBaFw0xODAxMjUxMjAwMDBaMGkxCzAJBgNVBAYTAlVTMRMw
EQYDVQQIEwpDYWxpZm9ybmlhMRMwEQYDVQQHEwpNZW5sbyBQYXJrMRcwFQYDVQQK
Ew5GYWNlYm9vaywgSW5jLjEXMBUGA1UEAwwOKi5mYWNlYm9vay5jb20wWTATBgcq
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DQEBCwUAA4IBAQCUCIiKXU+69lXWhFQsFFIn+udtWw490OCIRglLFlbxsSOoJXIk
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-----END CERTIFICATE-----
-----BEGIN CERTIFICATE-----
MIIEDjCCAvagAwIBAgITHgAAAAkpP1rIGhAhsQAAAAAACTANBgkqhkiG9w0BAQsF
ADAWMRQwEgYDVQQDEwtDQ0hNQ1Jvb3RDQTAeFw0xNjAzMjkxODQ5MThaFw0yNjAz
MjkxODU5MThaMF0xCzAJBgNVBAYTAlVTMQswCQYDVQQIEwJPSDETMBEGA1UEBxMK
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7ZrBWoyJOBQmbNkzJ2sWunQQXC783nBfPo2iBtGFJEIz0TLH66G1O5qRGgmF2fLj
R3o7k/ThYLPKX9tyarsrgKG64PmuuLc2q3myt6JMbJdJyg==
-----END CERTIFICATE-----

Modified by cor-el

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thank you, so it appears the affected device is in an enterprise environment where the certificates of legitimate websites are replaced with a different one in order to be able to monitor secure network traffic. it's probably best to get in contact with your it department on how to fix this issue and set up firefox to work in this kind of environment.

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Also: https://twitter.com/

Peer’s Certificate issuer is not recognized.

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

Certificate chain:

-----BEGIN CERTIFICATE-----
MIIF9zCCBN+gAwIBAgIRAOraTJHvo7NxYHmupn2dAwAwDQYJKoZIhvcNAQELBQAw
XTELMAkGA1UEBhMCVVMxCzAJBgNVBAgTAk9IMRMwEQYDVQQHEwpDaW5jaW5uYXRp
MQ4wDAYDVQQKEwVDQ0hNQzELMAkGA1UECxMCSVMxDzANBgNVBAMTBnNzbHJzYTAe
Fw0xNjAzMDkwMDAwMDBaFw0xODAzMTQxMjAwMDBaMIIBITEdMBsGA1UEDwwUUHJp
dmF0ZSBPcmdhbml6YXRpb24xEzARBgsrBgEEAYI3PAIBAxMCVVMxGTAXBgsrBgEE
AYI3PAIBAhMIRGVsYXdhcmUxEDAOBgNVBAUTBzQzMzc0NDYxEjAQBgNVBAkTCVN1
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5M7RGlGJkDANBgkqhkiG9w0BAQsFAAOCAQEANRZ2YRXh0w9XUpERLHsUTcjm/lQM
us8REZvUbEgKNzLjMx144IYfoF18nyZB2LUBLCqsHJChmU5JxDerXp9xf+eHrG1/
qtusMPTWtoYd+Pdmhpu2k4CgAPp79X3CNeeP5POCJMStTrTPhxrFAEPnaV99CIC+
HLBp7ykvEmw9cA1OmJEOp3Y2rJgEiHI2/p13rzLYA5GzPLcDnuP9vb98+HY20Tzs
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DpeBubN2dGMX0d6YDlCUYWTpKnd3/eEjonrzoGmtrhD0/VgDf1ivVoL9oA==
-----END CERTIFICATE-----
-----BEGIN CERTIFICATE-----
MIIEDjCCAvagAwIBAgITHgAAAAkpP1rIGhAhsQAAAAAACTANBgkqhkiG9w0BAQsF
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6AfMNNJ6YykVuE4y8zd16fGOcIxoJETEDjPnCkUfuPhGFcYpLVvVAIe/8lwIw+ju
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7ZrBWoyJOBQmbNkzJ2sWunQQXC783nBfPo2iBtGFJEIz0TLH66G1O5qRGgmF2fLj
R3o7k/ThYLPKX9tyarsrgKG64PmuuLc2q3myt6JMbJdJyg==
-----END CERTIFICATE-----

Modified by cor-el

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same issue with twitter - that's no valid certificate from twitter you are seeing there but it's actually issued by:

Common Name (CN) sslrsa Organizational Unit (OU) IS Organization (O) CCHMC Locality (L) Cincinnati State (ST) OH Country (C) US

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Ok, so you are saying my work is blocking it? But they only block it in Firefox? I guess I'll just have to start using Chrome :(

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Chosen Solution

no, your work is not blocking it, but they are intercepting/monitoring every secure connection you are opening - your firefox isn't properly configured to work with that apparently and therefore gives you an errors, because it cannot validate the "fake" certificates. again, your it department should be able to help out with that