How to fix Error code: SEC_ERROR_UNKNOWN_ISSUER on secure websites Call 1-800-240-2551 or Watch PPt and follow steps to fix or troubleshoot Error code: SEC_ERROR_UNKNOWN_ISSUER or Your connection is not secure error. In This PPT you will find steps to fix Error code: SEC_ERROR_UNKNOWN_ISSUER Error. For More- visit-: goo.gl/6s2yff

1. How to fix Error code:
SEC_ERROR_UNKNOWN_ISSUER
Follow Steps to fix Error code: SEC_ERROR_UNKNOWN_ISSUER or Call 1-800-240-
2551 Mozilla Firefox Browser Support Number for Help

2. What does this error code mean
During a secure connection a website needs to provide a certificate
issued by a trusted certificate authority in order to ensure that the
user is connected to the intended target and the connection is
encrypted. If you get a "Your connection is not secure" error page and
see the error code "SEC_ERROR_UNKNOWN_ISSUER" after you click
on Advanced, it means that the certificate provided was issued by a
certificate authority that is not known by Firefox and therefore cannot
be trusted by default.

3. The error occurs on multiple secure sites
In case you get this problem on multiple unrelated HTTPS-sites, it
indicates that something on your system or network is intercepting
your connection and injecting certificates in a way that is not
trusted by Firefox. The most common causes are security software
scanning encrypted connections or malware listening in, replacing
legitimate website certificates with their own.
Antivirus products
Generally, if your security product contains a feature to scan
encrypted connections, you could try to reinstall the security
product, which might trigger the software to place its certificates
into the Firefox trust store again. Try the following solutions for
particular security products:

4. Avast
1. In Avast security products you can disable the interception of
secure connections:
2. Open the dashboard of your Avast application.
3. Go to Settings > Active Protection and click Customize next
to Web Shield.
4. Uncheck the Enable HTTPS Scanning setting and confirm this
by clicking OK

5. Bitdefender
1. In Bitdefender security products you can disable the
interception of secure connections:
2. Open the dashboard of your Bitdefender application.
3. For the 2016 version of the Bitdefender security product,
click on Modules.
4.
For the 2015 version of Bitdefender, click on Protection.
5. Click on Web Protection.
6. Toggle off the Scan SSL setting.

6. Bullguard
In Bullguard security products you can disable the interception of
secure connections on particular major websites like Google, Yahoo
and Facebook:
1. Open the dashboard of your Bullguard application.
2. Click on Antivirus settings > Browsing.
3. Uncheck the Show safe results option for those websites which
are showing an error message.

7. ESET
In ESET security products you can try to disable and re-
enable SSL/TLS protocol filtering or generally disable the
interception of secure connections

8. Kaspersky
1. In Kaspersky security products you can disable the interception of
secure connections:
2. Open the dashboard of your Kaspersky application.
3. Click on Settings on the bottom-left.
4. Click Additional and then Network.
5. If you use a 2016 version of Kaspersky: In the Encrypted
connections scanning section check the Do not scan encrypted
connections option and confirm this change.
6.
Alternatively you can click on Advanced Settings in order to try to
trigger a reinstallation of Kaspersky's certificate. In the dialog that
opens click on Install certificate… and follow the on-screen
instructions.

9. If you use a 2015 version of Kaspersky: uncheck the Scan encrypted
connections option.
Finally, reboot your system for the changes to take effect.
The error occurs on one particular site only
In case you get this problem on one particular site only, this type of
error generally indicates that the web server is not configured
properly. However, if you see this error on a legitimate major
website like Google or Facebook or sites where financial
transactions take place

10. Missing intermediate certificate
On a site with a missing intermediate certificate you will see the following error
description after you click on Advanced on the "Your connection is not secure"
error page:
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.
The website's certificate might not have been issued by a trusted certificate
authority itself and no complete certificate chain to a trusted authority was
provided either (a so-called "intermediate certificate" is missing).
You can test if a site is properly configured by entering a website's address into
a third-party tool like SSL Labs‘ test page. If it is returning the result "Chain
issues: Incomplete", a proper intermediate certificate is missing. You should
contact the owner of the website you're having troubles accessing to inform
him of that problem.

11. Self-signed certificate
On a site with a self-signed certificate you will see the following error
description after you click on Advanced on the "Your connection is not
secure" error page:
The certificate is not trusted because it is self-signed.
A self-signed certificate that wasn't issued by a recognized certificate
authority is not trusted by default. Self-signed certificates can make
your data safe from eavesdroppers, but say nothing about who the
recipient of the data is. This is common for intranet websites that aren't
available publicly and you may bypass the warning for such sites.

12. Bypassing the warning
Warning: You should never add a certificate exception for a
legitimate major website or sites where financial transactions take
place – in this case an invalid certificate can be an indication that your
connection is compromised by a third party.
• If the website allows it, you can add an exception in order to visit
the site, in spite its certificate is not being trusted by default:
• On the warning page, click Advanced.
• Click Add Exception…. The Add Security Exception dialog will
appear.
• Read the text describing the problems with the website. You can
click View… in order to closer inspect the untrusted certificate as
well.

13. Click Confirm Security Exception if you are sure you want to trust the
site.
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