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Certificate Errors while accessing the SonicWall web management using Internet Explorer - Wissensdatenbank / IT-Security & Netzwerke / Sonicwall / Firewalls - tronet Servicecenter

Certificate Errors while accessing the SonicWall web management using Internet Explorer

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Description

Certificate Errors while accessing the SonicWall web management using Internet Explorer.

Resolution

Internet Explorer displays one of the following warnings with the self-signed (default) SSL certificate of the SonicWall: 

  • Untrusted Certificate
  • Certificate Invalid
  • Mismatched Address
  • There is a problem with this website’s security certificate.

When you click on the view certificates; it shows a red cross on the certificate and invalidates it.


This error message is IE’s normal behavior with the self-signed certificate of SonicWall because IE does not treat SonicWall as a trusted CA.

To get rid of these error messages make sure that:

  • A valid certificate signed by a trusted Certificate Authority or third party CA can be installed on the SonicWall device.
  • The common name on the SonicWall certificate should be same as the unit's fully qualified domain name (FQDN).
  • To verify this: Go to System | Administration page to match the unit's LAN IP address. If assigned, you may wish to use the unit's fully qualified domain name (FQDN).
  • If the time stamp on the certificate is invalid or the certificate is expired; get a new certificate form the CA.
  • Install the self-signed certificate; so next time the user logs in; should not receive the error message or the users may proceed without concern despite the certificate error.
Certificate installation procedure:
  • Click on the browser’s address bar and ‘Certificate error’.
  • Click on View Certificates.
  • Click on Install certificate.
  • Welcome to the Certificate Import Wizard' windows will appear click on Next
  • Let the 'Automatically select...' option selected click on Next
  • Click on Finish on the next window then it'll prompt for a security warning, just click 'Yes'
  • Close the browser and then open up a fresh browser window and check for error this time.
  • Now when a user clicks on the security padlock beside the address bar; it should show something like the below screen shot.
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