BeyondTrust – How to Secure Remote Access for Vendors & Employees: 10 Tips

Delinea – Limit Privileged Access for Third-Party Vendors Without Restricting their Ability to Get Work Done

Department of Homeland Security – Configuring and Managing Remote Access for Industrial Control Systems

State of Georgia – System Maintenance Policy

NIST SP 800-53 Rev 5: MA–3 Maintenance Tools

NIST SP 800-53 Rev 5: MA–4 Nonlocal Maintenance

NIST SP 800-53: IA-2 Identification and Authentication (Organization Users)

CyberSheath- How Multi-Factor Authentication Protects Your Business

NordLayer – The importance of multi-factor authentication for remote access

NIST SP 800-53: MA-5 Maintenance Personnel