Executive Summary – Localhost Port Exposure

Overview

A full TCP port scan of the localhost system identified several open ports commonly associated with web services, email services, remote procedure calls, and secure communication protocols. While some of these ports may be expected depending on installed software, their presence indicates active listeners that should be validated for necessity, configuration integrity, and security posture.

Key Findings

• Multiple high‑value service ports are exposed, including 80 (HTTP), 443 (HTTPS), and 445 (SMB).
• Email‑related ports (25, 465, 993) are active, suggesting local mail services or relay components.
• Remote procedure call and system‑level ports (111, 135) are open, which may increase the attack surface if not properly restricted.
• Virtualization‑related ports (902, 912) indicate VMware or similar hypervisor components running locally.

Risk Considerations

Open ports expand the system’s attack surface. Ports associated with legacy protocols (FTP, SMB), remote procedure calls, or email services should be reviewed to ensure they are required and properly secured. If these services are not intentionally enabled, they should be disabled or firewalled to reduce exposure.

Recommended Next Steps

• Validate which applications or services are actively using each open port.
• Disable or firewall any ports not required for normal system operation.
• Ensure all exposed services are patched and configured with secure authentication.
• Perform periodic port scans to track changes in system exposure.