If you already have SSL certificate from a Certificate Authority, you can import the certificate/key pair in Mettle SE and use it in places that demands it. (eg: SSL VPN, IPsec etc)
To import certificate go to Tools >> Certificate Authority Manager >> Certificates
Click on Add New
: Import an existing certificate
Enter Descriptive Name
for the certificate. This name will be displayed in other Mettle SE configurations.
Copy paste Certificate Data and Private Key Data in PEM format to appropriate boxes.
to import the certificate.