School proxy giving unverified certificate
At a school computer, whenever the internet is used, it goes past the school proxy, which is webproxy.lcps.org. It always signs certificates from Google as "Issued by" themselves. It also happens whenever I use Youtube or any other site by Google. How can I stop the SEC_ERROR_UNKNOWN_ISSUER error from appearing?
วิธีแก้ปัญหาที่เลือก
Hi,
To fix this, you need to import the certificate that your school district is using into Firefox. In order to do this, you need a copy of the certificate (typically a .cer file). If this is a school-issued computer, you likely already have a copy of the certificate installed on your computer. To find it:
- Press the win+r keys
- Type "certmgr.msc"
- The certificate manager should open.
- Look for your school district's root certificate - it's probably in the "trusted root certification authorities" or "third-party root certification authorities" section.
- Once you find the certificate, go to Action menu > All Tasks > Export.
- Export the certificate as a .cer file (you're given two choices of encodings, either one should work fine) and save it somewhere.
Once you have a copy of the certificate, you can import it into Firefox:
- Type "about:preferences#privacy" in the address bar.
- Scroll down to the "certificates" section at the bottom.
- Choose "View Certificates".
- Click the "import" button.
- Select the certificate file you just exported.
- Check the "Trust this CA to identify websites" box.
- Choose "OK".
If this is a device owned by you, or if you can't find the certificate installed on your computer, you'll need to ask your school for a copy of the certificate file.
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When using chrome://pippki/content/exceptionDialog.xul on google.com
วิธีแก้ปัญหาที่เลือก
Hi,
To fix this, you need to import the certificate that your school district is using into Firefox. In order to do this, you need a copy of the certificate (typically a .cer file). If this is a school-issued computer, you likely already have a copy of the certificate installed on your computer. To find it:
- Press the win+r keys
- Type "certmgr.msc"
- The certificate manager should open.
- Look for your school district's root certificate - it's probably in the "trusted root certification authorities" or "third-party root certification authorities" section.
- Once you find the certificate, go to Action menu > All Tasks > Export.
- Export the certificate as a .cer file (you're given two choices of encodings, either one should work fine) and save it somewhere.
Once you have a copy of the certificate, you can import it into Firefox:
- Type "about:preferences#privacy" in the address bar.
- Scroll down to the "certificates" section at the bottom.
- Choose "View Certificates".
- Click the "import" button.
- Select the certificate file you just exported.
- Check the "Trust this CA to identify websites" box.
- Choose "OK".
If this is a device owned by you, or if you can't find the certificate installed on your computer, you'll need to ask your school for a copy of the certificate file.
Practically everything is blocked in our computers, so "certmgr.msc" was also blocked. Thankfully, I found out that I could get the certificate through Internet Explorer's options. After getting them, I followed the rest of the instructions and it worked. Thank you!
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