Your question is a little unclear so I will answer it in several ways and hopefully I will give you the answer you require.
If you are asking what SSL method we support for Management, we default to TLSv1.2 and adhere to current industry standard recommendations for Server Side TLS (subject to change over time). Certificates for management (or for PEAP/TTLS/TLS or VPN use) can be self signed but the local CA or signed by a trusted (intermediate) CA.
If you are referring to what certificates we support in our CA implementation, currently we support up to 4098bit RSA keys with SHA-1 / SHA-256 hash.[/ul]
If you mean something else, let me know.
Dr. Carl Windsor
Field Chief Technology Officer
The Fortinet Security Fabric brings together the concepts of convergence and consolidation to provide comprehensive cybersecurity protection for all users, devices, and applications and across all network edges.