Why Network Security Matters
In today’s interconnected world, network security is critical for protecting sensitive data, maintaining operational efficiency, and ensuring regulatory compliance. Adopting these best practices can safeguard your business from cyber threats and vulnerabilities.
1. Segment Your Network
Why it’s important:
Network segmentation minimises risk by isolating sensitive data and critical systems.
How to implement:
Use VLANs (Virtual Local Area Networks) to separate traffic. Examples:
OFFICE VLAN: For core business operations.
GUEST VLAN: Restricted to internet-only access.
IOT VLAN: Isolates smart devices from critical systems.
Restrict communication between VLANs using tailored firewall rules. For example:
Block IoT devices from accessing internal office networks.
Permit surveillance cameras to communicate only with the NVR system.
2. Strengthen Firewall Rules
Why it’s important:
Customised firewall rules prevent unauthorised access and control network traffic.
How to implement:
Configure your firewall to:
Block unnecessary ports and protocols.
Allow only essential inter-VLAN communication.
Examples:
Restrict the CAMERA VLAN to communicate solely with the NVR system.
Enable internet access for the PHONE VLAN but block access to internal OFFICE/LAN networks.
3. Enable Secure DNS Settings
Why it’s important:
Proper DNS configuration protects against phishing attacks and ensures reliable connectivity.
How to implement:
Use secure and privacy-focused DNS servers:
Primary DNS: 9.9.9.9
Secondary DNS: 1.1.1.2
Block malicious domains using DNS filtering.
4. Monitor and Maintain Network Devices
Why it’s important:
Regular updates ensure devices are protected from vulnerabilities.
How to implement:
Keep routers, switches, and access points updated with the latest firmware.
Use monitoring tools to detect and resolve potential issues proactively.
5. Implement Multi-Factor Authentication (MFA)
Why it’s important:
MFA strengthens access controls and reduces the risk of unauthorised access.
How to implement:
Enable MFA for administrative access to network equipment and portals.
Require MFA for remote access connections.
6. Conduct Regular Security Audits
Why it’s important:
Audits identify vulnerabilities and ensure compliance with security standards.
How to implement:
Perform quarterly vulnerability scans.
Review firewall rules and access controls regularly.
Test your network segmentation for gaps or misconfigurations.
7. Address Common Network Issues
Dropped Calls: Optimise VoIP settings by prioritising voice traffic in QoS settings.
High Latency and Jitter: Minimise congestion by limiting non-critical traffic on key VLANs.
Call Failures: Review SIP and codec settings to ensure compatibility.
For more troubleshooting steps, refer to our detailed troubleshooting guide.
Case Study: Protecting Critical Data with VLANs
Challenge: A healthcare provider needed to protect patient records while allowing IoT devices like printers and security cameras.
Solution: Using VLAN segmentation and customised firewall rules, we isolated patient records on a secure VLAN and limited IoT devices to internet-only access.
Result: Enhanced security and compliance with privacy regulations.
Key References
By following these best practices, you can ensure your network is secure, scalable, and ready to support your business operations effectively. For further assistance, contact Pickle Support.