General Remediation Steps to Safeguard Remote Desktop Protocol (RDP):
Enable Network Level Authentication (NLA): Ensure that NLA is enabled on your RDP server. NLA requires users to authenticate before a remote session is established, reducing the risk of unauthorized access.
Use Strong Passwords: Enforce complex password policies for all user accounts, especially those used for RDP access. Avoid using default usernames like "Administrator."
Implement Account Lockout Policies: Set up account lockout policies to prevent brute-force attacks. After a certain number of failed login attempts, the account should be locked temporarily.
Keep RDP Software Updated: Regularly update both the RDP client and server software to benefit from the latest security patches and enhancements.
Use Network Firewalls: Place RDP servers behind firewalls and configure rules to allow RDP traffic only from trusted IP addresses. Block external RDP access if possible.
Change RDP Listening Port: Consider changing the default RDP port (TCP 3389) to a custom port. This can make it harder for attackers to identify and target your RDP server.
Limit User Access: Grant RDP access only to authorized users who require it for their tasks. Avoid providing administrative RDP access if not necessary.
Monitor Event Logs: Continuously monitor event logs for suspicious activities related to RDP, such as failed login attempts or unusual session activity.
Implement Two-Factor Authentication (2FA): If supported by your RDP solution, enable 2FA to add an extra layer of authentication for remote users.
Regular Security Audits: Conduct routine security audits to assess the effectiveness of your RDP security measures and identify any potential vulnerabilities.
Disable Unused RDP Features: If certain features of RDP are not needed, consider disabling them to reduce the attack surface.
Backup and Disaster Recovery: Regularly back up critical data and system configurations. In case of a security incident, having backups can help restore systems to a secure state.
By following these steps, you can enhance the security of your Remote Desktop Protocol implementation and protect your systems from unauthorized access and potential breaches.