A. Disable SSL VPN if HTTPS administrative access is using port 443 on any interface.

B. Keep port 443 for both SSL VPN and HTTPS administrative access on the same interface without any problems.

C. Run SSL VPN on one interface using port 443 and enable HTTPS administrative access on a different interface, also using port 443.

D. Change the port number for either the SSL VPN service or the HTTPS administrative service if both are on the same interface.