I have a client who is using an ASA5510 and wants to limit RDP access to a specific server by login credentials. They don't use any AAA servers for authentication now, just local accounts created on the firewall. Configuring the static NAT and the ACL to allow RDP to the server from the outside isn't an issue but I don't know how to make the firewall check for credentials before it allows the connection. Is this possible? If so, can I use local users?