Network Security Best Practices for Saudi Businesses

A modern business network connects far more than employee computers. It may include servers, Microsoft 365 and cloud services, Wi-Fi, mobile devices, printers, CCTV cameras, remote users, contractors, IoT equipment and, in industrial environments, operational technology.

That means network security is no longer simply a matter of installing a firewall at the Internet connection.

Businesses need to know what is connected, control which systems can communicate, secure network equipment and administrative access, protect remote connections, monitor suspicious activity and prepare for incidents.

For organizations in Saudi Arabia, network security also has an important governance dimension. The National Cybersecurity Authority’s current Essential Cybersecurity Controls (ECC 2-2024) include a dedicated Network Security Management subdomain covering segmentation, wireless security, Internet connectivity, network services and ports, intrusion prevention, DNS security, advanced-threat protection and DDoS protection. NCA

This guide explains practical network security best practices that Saudi businesses can use to assess and strengthen their current environment.

What Is Network Security?

Network security is the combination of technologies, processes and controls used to protect networks, connected systems and data from unauthorized access, misuse, disruption and cyber threats.

It can include:

• Firewalls
• Network segmentation
• Access controls
• Secure Wi-Fi
• VPN, ZTNA or other secure remote-access methods
• Network-device hardening
• Endpoint security
• DNS and web protection
• Intrusion detection and prevention
• Logging and monitoring
• Vulnerability management
• DDoS mitigation
• Incident response

The objective is to allow legitimate users and systems to communicate while limiting unnecessary access and making malicious activity more difficult to execute, spread or remain undetected.

Why Network Security Matters for Saudi Businesses

Saudi organizations increasingly depend on connected systems, cloud platforms and digital services. Network security therefore affects business continuity, data protection, user access and the availability of critical systems.

The National Cybersecurity Authority’s Key Economic Indicators in the Cybersecurity Sector 2025 report states that cybersecurity spending in Saudi Arabia reached SAR 15.2 billion in 2024, an increase of 14% compared with 2023. The report also identifies Network Security among the Kingdom’s most demanded cybersecurity products and services. National Cybersecurity Authority

That market data comes from NCA. From a practical business perspective, the importance of network security is easy to understand: almost every modern business system ultimately depends on network connectivity.

A compromised employee laptop may provide a pathway toward other systems. An exposed VPN or management interface may provide unauthorized remote access. Poorly separated guest Wi-Fi can create unnecessary exposure. An old CCTV recorder, printer or network appliance may become an unmanaged point of risk.

Strong network security reduces these opportunities and makes it harder for one compromised asset to affect the wider environment.

Network Security Best Practices at a Glance

These controls work together. A well-configured firewall cannot compensate for unrestricted administrator access, and endpoint protection cannot replace proper network segmentation.

1. Know What Is Connected to Your Network

You cannot effectively secure equipment you do not know exists.

Maintain an Asset Inventory

Document the devices connected to the environment, including:

• Routers
• Firewalls
• Switches
• Servers
• Desktop computers
• Laptops
• Wireless access points
• Printers and scanners
• CCTV cameras
• Network Video Recorders
• Access-control systems
• IP phones
• Meeting-room devices
• IoT equipment
• Managed mobile devices
• OT equipment where applicable

A useful inventory can include:

Asset records help with patching, incident response, troubleshooting and lifecycle planning.

Handle Unknown Devices Carefully

If an unfamiliar device appears on the network, first identify what it is, who owns it and what business function it performs.

Where appropriate and operationally safe, an unidentified or unauthorized device can then be isolated or quarantined until its purpose and security posture are understood.

This is particularly important in industrial or building environments, where abruptly disconnecting an unknown device without investigation could affect operations.

2. Segment the Network

Network segmentation separates systems according to purpose, trust level, sensitivity and risk.

A poorly controlled flat network can allow excessive communication between devices. If one system is compromised, an attacker may have a simpler path toward other resources.

A simplified example might look like:

Internet
↓
Firewall / Security Boundary
↓
Users | Servers | Finance | Guest Wi-Fi | CCTV/IoT | OT

This is an illustrative example only, not a universal network architecture. The correct zones should reflect actual applications, users, data flows and business risks.

A visitor using guest Wi-Fi, for example, should not automatically have the same access as finance systems or internal servers.

Segmentation can use:

• VLANs
• Subnets
• Firewalls
• Access Control Lists
• Security zones
• DMZs
• Controlled routing policies
• Microsegmentation where justified

CISA notes that segmentation can help contain an intrusion and prevent or limit lateral movement. CISA

For entities within scope, ECC 2-2024 specifically requires secure logical or physical network segmentation using firewalls and defense-in-depth principles. It also requires separation of production networks from development and testing environments. NCA

For industrial environments, see IT vs OT Cybersecurity: Key Differences for Businesses in Saudi Arabia.

3. Configure and Maintain Firewalls Properly

Buying a firewall is not the same as securing a network.

Firewall rules accumulate over time. A temporary exception created for a project may remain active long after the work is finished.

Review:

• Inbound rules
• Outbound rules
• Open ports
• Published services
• NAT rules
• VPN configurations
• Administrative access
• Site-to-site connections
• Remote-management rules
• Obsolete or temporary rules

Rules should also be reviewed when:

• A server is retired
• A project ends
• A vendor contract finishes
• A new branch or service is introduced
• Remote access changes
• A security incident occurs

Document why important rules exist and who approved them.

Detailed firewall deployment, vendor selection and configuration can remain on a dedicated Firewall Security / Firewall Support page rather than turning this pillar article into a firewall manual.

4. Harden Firewalls, Routers, Switches and Other Network Devices

The infrastructure protecting the network also needs protection.

A fully patched firewall or switch may still be exposed if its management interface, accounts or protocols are poorly configured.

Practical management-plane controls include:

• Restrict management interfaces to dedicated or trusted management networks
• Avoid unnecessary direct Internet exposure of administrative interfaces
• Replace default credentials
• Protect privileged administrator accounts
• Use encrypted, supported management protocols
• Disable obsolete or unnecessary management services
• Limit which systems can administer network equipment
• Log administrative changes
• Back up device configurations
• Review configuration baselines periodically
• Keep firmware and software supported

CISA has specifically warned about Internet-exposed management interfaces and recommends removing unnecessary Internet exposure or protecting such interfaces with appropriate access-control architecture. CISA

CISA hardening guidance also recommends eliminating default passwords and disabling insecure or unnecessary management functionality. CISA

5. Strengthen Identity and Network Access Control

Many attacks begin with compromised identities rather than a technical break-in.

Use MFA for High-Risk Access

Prioritize MFA for:

• Administrator accounts
• VPN and remote access
• Cloud administration
• Microsoft 365
• Network-management platforms
• Security platforms
• Privileged vendor access

For administrators and particularly sensitive remote access, phishing-resistant authentication should be considered where technically supported.

Apply Least Privilege

Users and vendors should receive only the access required for their role.

A finance employee does not normally require network-device administration. A contractor maintaining one application does not automatically need access to the entire internal network.

Use Separate Administrative Accounts

Where practical, administrators should use privileged accounts for administrative functions rather than using the same identity for email and everyday browsing.

This reduces unnecessary exposure of high-value credentials.

Advanced Option: NAC and 802.1X

For larger or higher-risk networks, Network Access Control (NAC), 802.1X or equivalent device/user admission controls can help determine who or what is permitted to connect.

NIST describes 802.1X as a mechanism that can authenticate devices or users before network access is granted. NIST Publications

This is not mandatory for every small business, but it can be useful where unmanaged devices, contractors or sensitive network segments create additional risk.

6. Patch Network Devices and Manage Vulnerabilities

Firewalls, switches, routers, VPN appliances, wireless infrastructure and management systems all run software that can contain vulnerabilities.

Include in vulnerability and patch management:

• Firewalls
• Routers
• Switches
• VPN gateways
• Wireless controllers
• Access points
• Servers
• Network-management systems
• Internet-facing appliances

A practical workflow may be:

Identify → Assess Exposure and Risk → Review Compatibility → Test Where Necessary → Schedule → Update → Verify

Internet-facing vulnerabilities generally deserve greater urgency than low-risk issues on isolated systems.

Also review:

• End-of-support dates
• Vendor security advisories
• Unsupported equipment
• Secure configuration, not just software version

Patching cannot compensate for a weak configuration, and hardening cannot compensate indefinitely for unsupported software.

7. Secure Business Wi-Fi

Wireless infrastructure is part of the corporate network and should be managed accordingly.

Use modern security configurations such as WPA2 or WPA3 with strong encryption, based on device compatibility and business requirements. For enterprise or higher-risk environments, centralized enterprise authentication can provide better identity control than a shared password.

CISA wireless guidance includes WPA2/WPA3 with AES-based encryption in its Wi-Fi configuration recommendations. CISA

Other controls include:

• Secure access-point administration
• Strong authentication
• Unique administrative credentials
• Current firmware
• Separation of guest access
• Restricted management interfaces
• Removal of obsolete wireless standards
• Periodic review of active access points

For larger or higher-risk environments, organizations may also monitor for rogue or unauthorized wireless access points.

ECC 2-2024 requires strong authentication and encryption for wireless security and requires risk assessment before connecting wireless networks to the internal network for organizations within scope. NCA

Keep Guest Wi-Fi Separate

Visitors and personal devices generally should not share unrestricted access with:

• Business servers
• Finance workstations
• ERP applications
• Internal printers
• CCTV
• Administrative systems

A dedicated guest network provides Internet access while reducing unnecessary exposure to internal resources.

8. Secure Remote and Third-Party Access

Remote connectivity can be necessary for employees, vendors and support providers, but it also creates an external pathway into the environment.

Review access for:

• Remote employees
• IT contractors
• Managed-service providers
• Equipment suppliers
• Maintenance companies
• ERP vendors
• Industrial-system vendors

Controls may include:

• VPN or another approved secure-access method
• ZTNA where appropriate
• MFA
• Restricted permissions
• Managed-device requirements
• Access logging
• Controlled jump systems
• Time-limited or just-in-time access where appropriate
• Periodic access reviews

A useful question is:

Does this supplier still need the remote access that was created six months ago?

If nobody knows, investigate it.

Always-on vendor access may be justified in some managed-service environments, but it should be an explicit business decision rather than an forgotten default.

9. Protect Endpoints That Connect to the Network

Endpoint protection is an adjacent security layer that directly affects network risk.

A compromised laptop remains a compromised device inside your environment.

Relevant controls include:

• Endpoint protection or EDR
• Operating-system patching
• Host firewalls
• Restricted local administrator rights
• Device management
• Disk encryption where appropriate
• Application control where justified
• Removable-media controls

Segmentation and least privilege can reduce what a compromised endpoint can reach.

Network and endpoint security should therefore complement each other.

10. Secure DNS and Internet Access

DNS is essential to normal business connectivity and can also be abused to direct users or systems toward malicious destinations.

Network security should consider both DNS infrastructure and DNS-based protection.

Review:

• Approved DNS resolvers
• Internal and external DNS configuration
• Malicious-domain filtering
• DNS logging
• Unauthorized DNS services
• Direct external DNS from restricted networks
• Web filtering
• Proxy or secure web gateway controls where appropriate

Sensitive networks should not automatically be allowed to bypass approved DNS or Internet-control mechanisms.

ECC 2-2024 specifically includes DNS security as well as secure Internet browsing and connectivity within Network Security Management. NCA

11. Monitor Network Activity and Security Logs

Prevention alone is not enough.

Useful security telemetry may include:

• Firewall logs
• VPN logs
• Authentication events
• Endpoint alerts
• Server logs
• Wireless events
• DNS activity
• Administrative changes
• Network anomalies

Investigate events such as:

• Repeated failed authentication
• Unexpected remote access
• New devices
• Unusual outbound communication
• Large or unusual transfers
• Unexpected administrative changes
• Traffic between segments that normally do not communicate

For larger or higher-risk environments, SIEM, NDR and related platforms may help centralize visibility and detection.

NCA’s Cybersecurity Toolkit includes supporting resources such as a Network Detection and Response Standard Template alongside other network-security templates. National Cybersecurity Authority

Collecting logs is not enough. Someone or some process must review meaningful alerts and respond to them.

12. Protect Internet-Facing Services Against DDoS

Distributed Denial-of-Service attacks attempt to overwhelm websites, applications, network infrastructure or other Internet-facing services.

Businesses should assess whether important public services require DDoS mitigation, especially:

• Customer portals
• E-commerce sites
• Public APIs
• Internet-facing business applications
• VPN gateways
• Other availability-sensitive services

Depending on the environment, protection can involve:

• ISP-level mitigation
• Cloud or CDN-based DDoS protection
• Specialized mitigation services
• Appropriate firewall and rate-control measures
• Redundancy and high availability
• Monitoring and incident procedures

DDoS protection is also explicitly included in ECC 2-2024 Network Security Management control 2.5.3.9. NCA

NCA additionally provides a DDoS protection standard template in its Cybersecurity Toolkit. National Cybersecurity Authority

The aim is not to promise that every attack can be prevented, but to improve service resilience and the organization’s ability to mitigate an attack.

13. Protect Printers, CCTV and IoT Devices

Network risk does not stop at computers and servers.

Frequently overlooked equipment includes:

• Printers
• IP cameras
• NVRs
• Door-access controllers
• Biometric devices
• Smart displays
• Meeting-room systems
• IoT controllers
• Old network appliances

Review them for:

• Default credentials
• Weak passwords
• Old firmware
• Unsupported software
• Unnecessary services
• Internet-exposed interfaces
• Excessive network access
• Vendor end-of-life status

A useful lifecycle is:

Inventory → Assess → Change Insecure Defaults → Update → Restrict → Segment → Monitor → Replace When Unsupported

For example, CCTV systems generally do not require unrestricted communication with finance computers or employee laptops.

14. Maintain Recovery and Tested Backups

Backups are primarily a cyber-resilience and recovery control, not something that prevents an attacker from entering the network.

They can, however, reduce the operational impact of ransomware, accidental deletion, hardware failure and other incidents.

A recovery strategy should consider:

• What information and systems require backup
• Frequency
• Retention
• Protection against unauthorized deletion
• Isolation or immutability where appropriate
• Recovery objectives
• Documentation
• Restoration testing

A backup console showing “successful” does not prove that business systems can actually be recovered.

NCA’s ECC also requires periodic testing of backup recovery effectiveness for entities within scope. NCA

15. Prepare for Network Security Incidents

An incident-response plan should answer practical questions before an incident occurs.

For example:

• Who receives alerts?
• Who can isolate a compromised device?
• Who can change firewall rules or restrict a connection?
• Who has access to logs?
• Who coordinates with management?
• Who contacts external security support?
• Which systems must remain operational?
• How will evidence be preserved?
• Where are recovery resources?
• How will services be restored?

Blocking an IP address may sometimes be appropriate, but containment should be based on the actual incident rather than treating one action as a universal response.

Tabletop exercises can help technical and business teams understand their responsibilities before a real incident.

16. Review Third-Party and Vendor Risk

A company’s effective network boundary often extends beyond its employees.

Third parties may include:

• IT contractors
• Managed-service providers
• ERP providers
• Cloud providers
• CCTV installers
• Maintenance companies
• Industrial equipment vendors

Review:

• What access they have
• Which systems they can reach
• Why access is required
• Whether MFA is used
• Whether actions are logged
• Who approves their access
• When access expires
• How access is removed at contract end

Where relevant, contracts should also address:

• Security responsibilities
• Incident notification
• Access-control requirements
• Account termination
• Data-handling expectations

Third-party connectivity should not become permanent simply because nobody revisited it after implementation.

17. Conduct Periodic Network Security Assessments

Networks change continuously.

Employees move departments. Firewall rules are added. Vendors connect. New applications appear. CCTV equipment is replaced. Old systems remain online longer than intended.

A network security assessment can review:

• Network architecture
• Asset inventory
• Network diagrams
• Firewall rules
• Device hardening
• Segmentation
• Wi-Fi
• VPN and remote access
• Administrator access
• Vulnerabilities
• Unsupported equipment
• CCTV and IoT
• DNS
• DDoS exposure
• Logging and monitoring
• Backup and recovery readiness

The goal should not be merely to produce a long technical report.

A useful assessment identifies which gaps create meaningful risk, explains why they matter and establishes practical remediation priorities.

Network Security and NCA Cybersecurity Controls in Saudi Arabia

NCA continues to publish ECC 2-2024 as the current Essential Cybersecurity Controls. Its official publication page identifies the current control set as ECC 2-2024. National Cybersecurity Authority

ECC includes Network Security Management as subdomain 2-5.

Its network-security requirements include:

• Secure logical or physical segmentation
• Separation of production from development/test environments
• Secure Internet connectivity and browsing
• Wireless-network protection
• Restriction and management of network services, protocols and ports
• Intrusion Prevention Systems
• DNS security
• Advanced-threat protection for Internet browsing
• Protection against DDoS attacks
• Periodic review of network-security controls

These requirements appear directly in ECC 2-2024. NCA

Who Does ECC 2-2024 Apply To?

The official ECC scope applies to:

• Government agencies in Saudi Arabia, including ministries, authorities, establishments and others
• Their affiliated companies and entities inside and outside the Kingdom
• Private-sector entities that own, operate or host Critical National Infrastructure

NCA strongly encourages other organizations in Saudi Arabia to use the controls as best-practice guidance to improve their cybersecurity. NCA

This distinction is important.

Not every private business in Saudi Arabia automatically has identical ECC compliance obligations.

Organizations should determine which NCA controls, sector requirements, contractual commitments and other obligations actually apply to their environment.

NCA Network Security Toolkit Resources

NCA also provides supporting cybersecurity templates covering areas such as:

• Network Security Policy
• Network Security Standards
• Wireless Network Security
• Network Detection and Response
• DDoS Protection
• Other cybersecurity operational topics

These tools can help organizations develop internal policies and standards. National Cybersecurity Authority

They are supporting templates, however. They do not replace the ECC itself or an organization’s responsibility to determine which formal requirements apply.

Network Security Checklist for Saudi Businesses

Use this as a practical starting point:

• ☐ Maintain a current asset inventory
• ☐ Keep an up-to-date network diagram
• ☐ Review firewall rules
• ☐ Harden firewall/router/switch management
• ☐ Remove unnecessary Internet-facing management interfaces
• ☐ Segment business networks appropriately
• ☐ Separate guest Wi-Fi
• ☐ Restrict sensitive finance/server networks
• ☐ Review CCTV and IoT connectivity
• ☐ Keep network-device firmware supported
• ☐ Identify end-of-life equipment
• ☐ Use modern Wi-Fi security
• ☐ Protect administrative and remote access with MFA
• ☐ Review vendor access
• ☐ Consider NAC/802.1X where justified
• ☐ Disable unnecessary ports and services
• ☐ Secure DNS and web access
• ☐ Protect endpoints
• ☐ Monitor network and security logs
• ☐ Assess DDoS exposure for public services
• ☐ Protect and test backups
• ☐ Maintain an incident-response process
• ☐ Assess relevant NCA requirements
• ☐ Conduct periodic network-security assessments

This checklist is a starting point, not a formal ECC compliance assessment.

How NABCO Helps Businesses Strengthen Network Security

NABCO’s current public service portfolio includes network security, firewall installation and management, VPN and secure remote access, endpoint protection, access control, network monitoring and related cybersecurity services for Saudi businesses. NABCO Network Security Services

Depending on the organization’s requirements, relevant areas can include:

• Network assessment and design
• Firewall solutions and rule management
• Network segmentation
• Secure business Wi-Fi
• VPN and secure remote access
• Network monitoring
• Endpoint protection
• Microsoft 365 security
• Backup and disaster recovery
• Cybersecurity assessments
• IT infrastructure support

The appropriate design depends on the network architecture, users, connected devices, business operations and actual risk.

For organizations that are unsure where to begin, NABCO’s Cybersecurity Readiness Assessment can provide an initial view of areas such as endpoint/network security, firewall and remote-access configuration, backups and cybersecurity practices. NABCO Services

Talk to NABCO about reviewing your current network environment and security requirements.

Frequently Asked Questions About Network Security

What are the most important network security best practices?

Start with an accurate asset inventory, segmentation, properly managed firewalls, secure network-device administration, MFA for high-risk access, patching, secure Wi-Fi, controlled remote access, logging and tested recovery.

What is network segmentation?

Network segmentation separates systems into controlled zones and restricts unnecessary communication between them. It can help contain compromises and reduce lateral movement. CISA

Is a firewall enough to secure a business network?

No. Firewalls are important, but businesses also need secure identities, endpoint protection, network segmentation, patching, Wi-Fi security, remote-access controls, monitoring and incident-response capabilities.

How should a small business secure Wi-Fi?

Use a supported WPA2/WPA3 configuration with strong encryption, change default administrative credentials, update access-point firmware and keep guest access separate from trusted business resources. CISA

Should network equipment management pages be accessible from the Internet?

Unnecessary Internet exposure should be avoided. Administrative interfaces should normally be restricted to trusted management pathways or protected through an appropriate secure-access architecture. CISA specifically warns about Internet-exposed network management interfaces. CISA

What is NAC?

Network Access Control helps determine which users or devices are allowed to connect to a network. Technologies such as 802.1X can support authenticated network admission, particularly in larger or higher-risk environments. NIST Publications

Do backups prevent ransomware?

No. Backups do not prevent an attacker from deploying ransomware. Protected and tested backups improve the organization’s ability to recover after ransomware, data loss or system failure.

What NCA controls relate to network security?

ECC 2-2024 Network Security Management covers segmentation, production/test separation, secure Internet connectivity, wireless security, ports and protocols, IPS, DNS security, advanced-threat protection and DDoS protection. NCA

Does every Saudi company have to comply with ECC 2-2024?

No. ECC has a defined scope covering Saudi government agencies and their affiliated entities, including those inside and outside the Kingdom, plus private entities owning, operating or hosting Critical National Infrastructure. NCA encourages other Saudi organizations to use ECC as best-practice guidance. NCA

Final Thoughts

Effective network security best practices start with visibility and controlled access.

Know what is connected. Restrict unnecessary communication. Secure the network devices themselves. Segment sensitive environments. Protect Wi-Fi and remote access. Monitor meaningful events. Prepare for DDoS and other availability risks. Maintain tested recovery capabilities.

For Saudi businesses, these technical practices should also be considered alongside applicable NCA requirements, sector-specific obligations and the organization’s actual risk profile.

A structured network-security assessment can then turn a long list of possible improvements into a prioritized plan based on the devices, users, applications and business processes that matter most.