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FireFox is blocking many sites and says This Connection is Untrusted

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New User

FireFox is blocking many sites and says This Connection is Untrusted

many sites is blocked by firefox like facebook , yahoo mail and even this site. its saying This Connection is Untrusted and this sites working on other browsers and i'm sure that the pc date is right and up to date so what???

1 ACCEPTED SOLUTION

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Site Moderator

Re: FireFox is blocking many sites and says This Connection is Untrusted

Which security software (firewall, anti-virus) do you have?

Some monitor secure connections and send their own certificate instead.

Some examples:

  • ESET setup -> advanced setup -> extend web and email tree -> SSL
  • SSL protocol: Do not scan SSL protocol
  • BitDefender -> Privacy settings -> disable Scan SSL
15 REPLIES
Site Moderator

Re: FireFox is blocking many sites and says This Connection is Untrusted

Which security software (firewall, anti-virus) do you have?

Some monitor secure connections and send their own certificate instead.

Some examples:

  • ESET setup -> advanced setup -> extend web and email tree -> SSL
  • SSL protocol: Do not scan SSL protocol
  • BitDefender -> Privacy settings -> disable Scan SSL
New User

Re: FireFox is blocking many sites and says This Connection is Untrusted

tnx man it's working good now thank you

Site Moderator

Re: FireFox is blocking many sites and says This Connection is Untrusted

You're welcome

Which security software do you have?

New User

Re: FireFox is blocking many sites and says This Connection is Untrusted

Hi am not clear on the instruction: SSL protocol: Do not scan SSL protocol do I select that function or deselect it. Am having hell after reset and troubleshooting I cannot access any site without the Untrusted message coming up ..I use eset

Site Moderator

Re: FireFox is blocking many sites and says This Connection is Untrusted

"Do not scan SSL protocol" in the ESET options should be selected when you're having issues with the "This Connection is Untrusted"-error message showing up on any secure page.

New User

Re: FireFox is blocking many sites and says This Connection is Untrusted

Am still having the problem even though I selected it. Thank you for quick response

Site Moderator

Re: FireFox is blocking many sites and says This Connection is Untrusted

maybe it will take a restart of the pc for the settings to take effect. if this doesn't work either, could you look under "technical details" on the error page & tell us which error code is being displayed there?

New User

Re: FireFox is blocking many sites and says This Connection is Untrusted

(Error code: sec_error_untrusted_cert) this is what am getting as an error in technical details

Site Moderator

Re: FireFox is blocking many sites and says This Connection is Untrusted

ok, then the problem is likely caused by something else here (i think in the cases where ESET SSl scanning interfered sec_error_reused_issuer_and_serial would be shown).

please try this: go to firefox > help > troubleshooting information and open the profile directory (then close firefox). in the profile folder rename the files cert_override.txt & cert8.db to something like oldcert or delete them... afterwards restart the browser (this will regenerate the file in question again).