You can delete an expired or unused certificate from the TLS Authentication page.
Important:
The web interface instantly deletes a certificate and does not display a confirmation window.
Procedure
On the Settings menu, go to Security > TLS Authentication.
On the TLS Authentication page, for the certificate to delete, click Delete.
The web interface removes the certificate from the certificate list. If you deleted a certificate by mistake, you need to upload the PKCS #12 certificate bundle again.
