Network Security Best Practices

Overview

Network security involves protecting the integrity, confidentiality, and availability of data as it travels across networks. For Hong Kong organisations, this includes compliance with local regulations and protection against region-specific threats.

Network Segmentation

Divide your network into smaller, isolated segments to limit the spread of attacks. Recommended segments include:

• Corporate LAN: Employee workstations and internal resources
• DMZ (Demilitarised Zone): Public-facing servers and services
• Management Network: Network equipment and administration tools
• Guest Network: Visitor and IoT device access

Firewall Configuration

Implement a layered firewall strategy:

• Perimeter firewall (next-generation) for internet-facing traffic
• Internal firewalls between network segments
• Host-based firewalls on critical servers

VPN and Remote Access

Use enterprise-grade VPN solutions with strong encryption (AES-256) and enforce multi-factor authentication for all remote connections. Consider implementing Zero Trust Network Access (ZTNA) for modern remote work scenarios.

Intrusion Detection and Prevention

Deploy IDS/IPS systems at network boundaries and monitor traffic patterns for anomalies. Integrate with a SIEM solution for centralised log analysis and alerting.

Wireless Security

• Use WPA3 encryption for all wireless networks
• Implement enterprise authentication (802.1X) where possible
• Disable WPS on all access points
• Regularly audit wireless access points and remove unauthorised devices