Tips To Fix Invalid Certificate Error When Conecting To Linksys Wireless Routers

If you use Firefox browser when connecting to your Linksys wireless router administration interface, more than likely you can’t and have seen this warning message:

Consider yourself lucky if you do receive the same warning message, because it’s an easy fix by:

clicking the link at the bottom of the error message, Or you can add an exception…
then click on the Add Exception button…
linksys-cert-problem2followed by clicking on the Get Certificate button (on the next screen) and clicking the Confirm Security Exception button at the bottom of the page.
The invalid certificate warning will not display the next time you connect to your router.

But for those of you out there (like me) that receives an error message similar to this… uses an invalid security certificate.
The certificate is not trusted because it is self signed.
The certificate is only valid for <a id=”cert_domain_link” title=”Linksys”>Linksys</a>
(Error code: sec_error_ca_cert_invalid)

…here’s a possible fix to get things working again when connect to your wireless Linksys router.

On my system (and hopefully on yours) the reason why this error message occurs is because the existing Cisco Linksys certificate is corrupted. Here’s how to fix that:

In Firefox, click on Tools \ Options, select the Advanced tab, then select the Encryption tab.
Next, click on View Certificates button.

Make sure the Authorities tab is selected, and scroll down to you see the Linksys certificate under Cisco-Linksys, LLC.
Now highlight and click the delete button.

Select the Servers tab (next to Authorities tab), and look for the certificate shown in the following screen shot. Highlight and delete it.

Now, click OK all the way back to Firefox, and reconnect to your router using

You will see the same Secure Connection Failed warning message shown at beginning of article. Follow the same steps for accepting the exception which will add a new Cisco Linksys certificate.

You will now be able to authenticate successfully and will no longer see any certificate error messages.

Unfortunately I have not been able to resolve the same issue if you use Internet Explorer 7. But fortunately it’s a lot easier to bypass the warning by clicking on Continue to this website (not recommended).