Network Security Features in Windows

Network Security Features in Windows

Windows includes comprehensive network security features that protect against various attack vectors. Windows Defender Firewall, formerly Windows Firewall, provides stateful packet filtering with separate profiles for domain, private, and public networks. Advanced security mode enables creating sophisticated rules based on programs, services, ports, and IP addresses.

IPsec (Internet Protocol Security) integration enables encrypted network communication between Windows systems. Configure IPsec policies through Group Policy or Windows Defender Firewall with Advanced Security. IPsec protects against network sniffing and man-in-the-middle attacks, particularly important for sensitive data transmission. Implement IPsec for domain controller replication, administrative connections, and sensitive application traffic.

Network isolation using Windows Defender Firewall prevents lateral movement after initial compromise. Implement host-based firewall rules that restrict unnecessary network communication between systems. Block workstation-to-workstation communication, limit server access to required ports, and prevent direct internet access from servers. These restrictions significantly hamper attacker movement through the network.

Windows provides built-in network security protocols including SMB encryption and signing. Enable SMB signing to prevent relay attacks and ensure communication integrity. Disable older SMB versions (SMBv1) that contain known vulnerabilities. Configure LDAP signing and channel binding to protect Active Directory communications from interception and modification.