Managing Users, Authentication, and VPN Certificates
400
ProSecure Unified Threat Management (UTM) Appliance
 To delete one or more digital certificates:
1. In the Trusted Certificates (CA Certificate) table, select the check box to the left of each
digital certificate that you want to delete, or click the Select All table button to select all
digital certificates.
2. Click the Delete table button.
Manage Self-Signed Certificates
Instead of obtaining a digital certificate from a CA, you can generate and sign your own digital
certificate. However, a self-signed certificate triggers a warning from most browsers because
it provides no protection against identity theft of the server. (The following figure shows an
image of a browser security alert.)
There can be three reasons why a security alert is generated for a security certificate:
• The security certificate was issued by a company you have not chosen to trust.
• The date of the security certificate is invalid.
• The name on the security certificate is invalid or does not match the name of the site.
When a security alert is generated, the user can decide whether or not to trust the host.
Figure 244.
Generate a CSR and Obtain a Self-Signed Certificate from a CA
To use a self-signed certificate, you first need to request the certificate from a CA, and then
download and activate the certificate on the UTM. To request a self-signed certificate from a
CA, you need to generate a certificate signing request (CSR) for and on the UTM. The CSR
is a file that contains information about your company and about the device that holds the
certificate. Refer to the CA for guidelines about the information that you need to include in
your CSR.
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