This implementation package establishes a secure, resilient and manageable network for a mid-sized restaurant.

The architecture separates payment processing, business operations, employee connectivity, guest Wi-Fi, cameras, infrastructure management and monitoring into dedicated network segments.

The principal objectives are:

1. Protect POS and payment-processing systems.
2. Prevent guest and employee devices from accessing business-critical systems.
3. Provide reliable Wi-Fi connectivity throughout the restaurant.
4. Protect IP cameras and network video recording infrastructure.
5. Monitor switches, access points, firewalls, servers and network services.
6. Collect and analyze network logs for operational and security investigations.
7. Establish a documented configuration that can be maintained and expanded.

Restaurant Network Implementation Package

Secure, Segmented, Monitored Network Architecture

Prepared for: Mid-Sized Restaurant Operations
Implementation and Managed IT: KeenComputer.com
Research, Architecture and Security Validation: IAS-Research.com
Digital Commerce Integration: KeenDirect.com
Document type: Technical Implementation and Acceptance Package
Location context: Winnipeg, Manitoba, Canada
Version: 1.0 — November 2026

1. Executive Summary

This implementation package establishes a secure, resilient and manageable network for a mid-sized restaurant.

The architecture separates payment processing, business operations, employee connectivity, guest Wi-Fi, cameras, infrastructure management and monitoring into dedicated network segments.

The principal objectives are:

1. Protect POS and payment-processing systems.
2. Prevent guest and employee devices from accessing business-critical systems.
3. Provide reliable Wi-Fi connectivity throughout the restaurant.
4. Protect IP cameras and network video recording infrastructure.
5. Monitor switches, access points, firewalls, servers and network services.
6. Collect and analyze network logs for operational and security investigations.
7. Establish a documented configuration that can be maintained and expanded.

1.1 Proposed technology

Component	Proposed platform
Internet gateway	ISP modem/ONT in bridge mode
Firewall/router	Cisco Meraki MX
Core switching	D-Link managed 24-port switch
PoE switching	D-Link managed 24-port PoE+ switch
Wireless	Managed PoE Wi-Fi access points
Surveillance	IP cameras and dedicated NVR
Monitoring	Nagios Core or Nagios XI
Log management	Centralized syslog with optional Graylog/OpenSearch
Business endpoints	POS, accounting and administration computers

The final bill of materials must be checked against the actual MX model, switch SKU, access-point power requirements and camera specifications.

2. Physical Network Architecture

2.1 Logical topology

INTERNET | ISP MODEM / ONT BRIDGE MODE | PUBLIC WAN IP | CISCO MERAKI MX ROUTING / FIREWALL | 802.1Q TRUNK | D-LINK 24-PORT CORE MANAGED SWITCH / \ / \ ACCESS / NON-POE 802.1Q TRUNK DEVICES | | D-LINK 24-PORT PoE+ MANAGED SWITCH / | \ / | \ Wi-Fi Cameras NVR APs IP CCTV NAGIOS MONITORING SERVER SYSLOG / LOG ANALYSIS

The core switch carries the VLANs required by the MX and the PoE switch. The MX performs inter-VLAN routing and enforces security policies, unless the approved design explicitly uses another routing arrangement.

2.2 Physical installation requirements

• Install the MX and switches in a secured, ventilated rack or cabinet.
• Use UPS protection for the ISP equipment, MX, switches and NVR.
• Label every switch port at both ends.
• Use Cat6 cabling for new permanent installations.
• Separate power cabling from network cabling where practical.
• Protect the rack against unauthorized physical access.
• Document all uplinks, patch-panel connections and cable destinations.
• Keep the NVR and monitoring server accessible only to authorized administrators.

3. ISP WAN and Meraki MX Configuration

3.1 ISP bridge configuration

The preferred arrangement is to configure the ISP gateway or modem in bridge mode.

In bridge mode, the ISP device passes the WAN connection to the Meraki MX rather than acting as a second router.

Expected connection:

ISP Network | ISP Modem / ONT | Bridge Mode | Meraki MX WAN Interface | Meraki MX LAN Interface | Managed Switch

WAN configuration checklist

Parameter	Required configuration
ISP equipment	Bridge mode, if supported
MX WAN interface	Connected directly to bridged handoff
WAN addressing	ISP DHCP, static IP or PPPoE
ISP VLAN tagging	As specified by ISP
DNS	Approved ISP or business DNS configuration
MTU	ISP-supported value
WAN failover	Optional secondary Internet connection
Remote administration	Restricted to authorized administrators

Important: Bridge mode is not always supported by every ISP gateway. Some ISPs require PPPoE credentials, a VLAN ID, MAC registration or a specific ONT configuration. Confirm these requirements with the ISP before installation.

If true bridge mode is unavailable, use a supported passthrough or DMZ arrangement where appropriate. Document any remaining double-NAT condition and verify VPN, inbound services and application compatibility.

3.2 Meraki MX configuration

Configure the MX through the Meraki Dashboard.

Recommended configuration sequence:

1. Claim and register the MX in the correct organization and network.
2. Confirm firmware compatibility and update policy.
3. Configure the WAN connection.
4. Confirm Internet connectivity.
5. Configure the LAN interface and VLANs.
6. Enable VLAN-aware routing.
7. Configure DHCP scopes or DHCP relay.
8. Configure inter-VLAN firewall rules.
9. Configure security and threat-protection features supported by the MX model and licence.
10. Configure alerts, administrative access and configuration backup procedures.

MX LAN configuration

Setting	Proposed value
LAN mode	VLANs
MX LAN IP	10.10.60.1/24
Management VLAN	VLAN 60
POS VLAN gateway	10.10.10.1
Office VLAN gateway	10.10.20.1
Employee VLAN gateway	10.10.30.1
Guest VLAN gateway	10.10.40.1
Camera VLAN gateway	10.10.50.1
Server VLAN gateway	10.10.70.1

The gateway addresses above are examples. Each VLAN interface must be configured with its corresponding subnet and DHCP policy.

4. VLAN and IP Addressing Plan

The restaurant network should use separate VLANs for systems with different business functions and security requirements.

4.1 VLAN allocation

VLAN ID	VLAN name	Example subnet	Purpose
10	POS-PAYMENT	10.10.10.0/24	POS terminals and payment systems
20	OFFICE	10.10.20.0/24	Accounting and administration
30	STAFF-WIFI	10.10.30.0/24	Employee wireless devices
40	GUEST-WIFI	10.10.40.0/24	Customer Internet access
50	CCTV-IOT	10.10.50.0/24	Cameras and approved IoT devices
60	MANAGEMENT	10.10.60.0/24	Switches, APs and infrastructure
70	SERVERS	10.10.70.0/24	Nagios, NVR and approved servers

Security principles

• Guest Wi-Fi must not access internal VLANs.
• Employee Wi-Fi must not access POS or camera devices unless explicitly authorized.
• Cameras must not initiate connections to POS or accounting systems.
• Switch management must be restricted to the management VLAN.
• POS access must be limited to approved payment services and required business systems.
• Monitoring access must be explicitly permitted rather than allowing unrestricted access.

The VLAN design is a segmentation mechanism, not a complete security boundary by itself. Firewall enforcement, endpoint controls and secure device configuration are also required.

5. D-Link 24-Port Switch Configuration

5.1 Proposed switch models

Two possible configurations are:

• D-Link DGS-1210-28: managed 24-port non-PoE switch.
• D-Link DGS-1210-28P or DGS-1210-28MP: managed 24-port PoE+ switch.

Confirm the exact hardware revision, firmware, PoE budget, uplink interfaces and VLAN feature support before procurement.

The following port allocation is an implementation template, not a claim about a specific switch's current configuration.

5.2 Core non-PoE switch port map

Switch: CORE-SW01
Function: POS, office and server connectivity

Ports	Assigned device	VLAN	Port mode
1–4	POS terminals	10	Access
5–6	Payment-related approved devices	10	Access
7–10	Accounting computers	20	Access
11–12	Administration computers	20	Access
13–14	Business printers	20	Access
15–16	Servers / NVR connection as designed	70 or 50	Access
17–20	Reserved business devices	Assigned VLAN	Access
21	Nagios monitoring server	70	Access
22	Spare	Disabled until needed	Unused
23	MX uplink	10,20,30,40,50,60,70	Trunk
24	PoE switch uplink	10,20,30,40,50,60,70	Trunk

If the NVR is placed in a separate server or surveillance VLAN, use the corresponding VLAN and firewall policy. Do not assign multiple unrelated security roles to one access port.

5.3 PoE switch port map

Switch: POE-SW01
Function: Wireless access points and surveillance cameras

Ports	Device	VLAN	Port mode
1–4	Wireless APs	30,40,60	Trunk or AP-specific configuration
5–12	IP cameras	50	Access
13–16	Additional cameras	50	Access
17–20	Future PoE devices	Assigned VLAN	Access
21–22	Reserved	Disabled until needed	Unused
23	Core switch uplink	All approved VLANs	Trunk
24	Reserved uplink	As approved	Disabled or configured

Switch configuration requirements

• Create all approved VLANs.
• Configure trunk ports with explicit allowed VLAN lists.
• Configure native VLAN handling consistently on both ends.
• Avoid using VLAN 1 for business endpoint traffic.
• Set unused ports to a parking VLAN or disable them.
• Disable unnecessary discovery and management services.
• Use secure management protocols supported by the switch.
• Restrict management interfaces to the management VLAN.
• Configure SNMPv3 where supported.
• Configure syslog forwarding where supported.
• Save the running configuration and maintain a backup.

The precise command syntax depends on the D-Link model and firmware. Use the manufacturer's documentation for the actual configuration interface.

6. Firewall Rule Matrix

The MX firewall should implement a default-deny inter-VLAN policy.

Only explicitly approved traffic should cross VLAN boundaries.

6.1 Proposed firewall matrix

Source	Destination	Policy	Reason
POS VLAN 10	Approved payment processor endpoints	Allow	Payment processing
POS VLAN 10	Required POS vendor services	Allow	POS operation and updates
POS VLAN 10	Office VLAN 20	Deny	Prevent lateral movement
POS VLAN 10	Guest VLAN 40	Deny	Isolation
POS VLAN 10	Camera VLAN 50	Deny	Isolation
Office VLAN 20	Approved Internet services	Allow	Business operations
Office VLAN 20	POS VLAN 10	Deny by default	Protect payment systems
Staff VLAN 30	Internet	Allow	Employee connectivity
Staff VLAN 30	POS VLAN 10	Deny	Isolation
Guest VLAN 40	Internet	Allow	Customer connectivity
Guest VLAN 40	All internal VLANs	Deny	Guest isolation
Camera VLAN 50	Approved NVR	Allow	Video recording
Camera VLAN 50	Internet	Deny by default	Limit camera exposure
Management VLAN 60	Switches and APs	Allow	Administration
Management VLAN 60	MX management services	Allow	Infrastructure management
Nagios server	Approved monitoring targets	Allow	Monitoring
Nagios server	Syslog destinations	Allow	Log analysis
All VLANs	Unapproved internal networks	Deny	Default isolation

6.2 Important implementation details

POS and payment systems: Obtain the payment processor's current endpoint, DNS, port and connectivity requirements. Do not assume that all POS devices use the same ports or protocols.

Cameras: Allow cameras to communicate with the NVR only on required services. Permit NTP and DNS only to approved infrastructure. Disable unnecessary cloud connectivity.

Nagios: Allow monitoring probes from the monitoring server to designated targets. Use authenticated agents where possible.

Guest Wi-Fi: Enable client isolation and prevent access to private address ranges. Apply appropriate bandwidth limits.

Management: Permit administration only from designated administrator devices or approved VPN connections.

Firewall policies must be tested against actual application requirements before enforcing a deny rule in production.

7. Wireless Access Point Configuration

7.1 Wireless network design

SSID	VLAN	Intended users
Restaurant-POS	10	Only where wireless POS is approved
Restaurant-Staff	30	Employees
Restaurant-Guest	40	Customers
Restaurant-Admin	60	Authorized infrastructure administration, if wireless administration is necessary

Prefer wired POS connections where practical. If wireless POS is necessary, implement the payment vendor's security requirements and a tightly restricted wireless design.

7.2 Wireless security

• Use WPA2-AES or WPA3 as supported by client devices.
• Prefer enterprise authentication for staff where practical.
• Use separate credentials for guest access.
• Disable WPS.
• Enable guest client isolation.
• Restrict AP management to VLAN 60.
• Apply appropriate radio power and channel planning.
• Review coverage in dining areas, kitchen, offices and outdoor seating.
• Maintain an inventory of AP serial numbers and firmware.

8. PoE Power Budget

PoE capacity must be calculated using actual device specifications, not simply the number of ports.

8.1 Illustrative power estimate

Device	Quantity	Estimated power/device	Total
Wi-Fi APs	4	18 W	72 W
IP cameras	8	8 W	64 W
Other PoE devices	2	5 W	10 W
Total	14		146 W

For a 193 W PoE switch:

• Estimated load: 146 W
• Available nominal capacity: 193 W
• Remaining nominal headroom: 47 W
• Estimated utilization: 75.6%

A 370 W PoE switch provides greater expansion capacity.

8.2 PoE acceptance requirements

• Confirm each AP and camera's IEEE PoE class and maximum draw.
• Check whether any device requires PoE+ or a higher power standard.
• Verify total switch power budget.
• Check per-port power limitations.
• Include startup and infrared illumination loads where applicable.
• Maintain reasonable spare capacity for future devices.
• Confirm UPS capacity for the PoE switch and attached devices.

9. Nagios Monitoring and Network Operations

Nagios provides infrastructure and service monitoring. It should be supplemented with centralized logging and security processes.

9.1 Monitoring architecture

NAGIOS SERVER | Monitoring VLAN / Server | +---------------+----------------+ | | | MERAKI MX D-LINK SWITCHES SERVERS | | | +---------------+----------------+ | SERVICE CHECKS | ALERTS / DASHBOARDS | ADMINISTRATORS

9.2 Monitoring inventory

Device/service	Monitoring method	Frequency
Meraki MX	Dashboard/API or supported SNMP checks	1–5 min
WAN connectivity	ICMP and external service checks	1 min
Core switch	SNMPv3 / ICMP	5 min
PoE switch	SNMPv3 / ICMP	5 min
APs	Dashboard/API or supported SNMP	5 min
POS endpoints	Availability and approved service checks	5 min
NVR	ICMP and service checks	5 min
Cameras	Availability and approved service checks	5 min
Nagios server	CPU, RAM, disk, services	5 min
UPS	SNMP or vendor monitoring	5 min

Monitoring must not interfere with payment operations. Use conservative check intervals and avoid aggressive scanning of POS devices.

9.3 Nagios alert conditions

Condition	Severity	Action
WAN unavailable	Critical	Notify administrator immediately
MX unavailable	Critical	Escalate to network support
Core switch unavailable	Critical	Escalate immediately
PoE switch unavailable	Critical	Check cameras and APs
AP unavailable	Warning/Critical	Check coverage and device
NVR unavailable	Critical	Investigate surveillance outage
Camera unavailable	Warning	Check camera and cabling
Server disk above 80%	Warning	Review capacity
Server disk above 90%	Critical	Immediate remediation
High CPU sustained	Warning	Investigate workload
UPS on battery	Warning	Check utility power
UPS battery low	Critical	Prepare controlled shutdown

Thresholds should be adjusted to actual equipment and business impact.

9.4 Syslog and log analysis

Forward logs from supported network equipment to a central log server.

Potential platforms:

• Graylog
• OpenSearch
• Linux rsyslog
• Syslog-ng

Collect:

• Firewall security events
• VPN authentication events
• Switch port changes
• Configuration changes
• AP association and authentication events
• DHCP and DNS events
• NVR login and configuration events
• Nagios alerts
• Server authentication and system logs

Recommended controls:

1. Synchronize all devices with a trusted NTP source.
2. Use secure log transport where supported.
3. Restrict log-server access.
4. Define log retention based on legal, operational and payment-security requirements.
5. Protect logs against unauthorized modification.
6. Alert on repeated authentication failures and unexpected configuration changes.
7. Review logs regularly and document incidents.

Nagios is not a SIEM. Graylog or OpenSearch can support log analysis, but neither automatically replaces a formal security monitoring and incident-response capability.

10. Restaurant-Specific Operational Use Cases

Use Case 1: Guest Wi-Fi compromise

Scenario: A customer connects a compromised laptop to the restaurant guest network.

Expected protection:

• Guest network is isolated.
• Customer devices cannot reach POS systems.
• Customer devices cannot access cameras or business servers.
• Internet access remains available.

Validation: Attempt access to approved internal test addresses from a guest device. Verify that access is blocked.

Use Case 2: POS malware infection

Scenario: A POS endpoint is infected through an external connection.

Expected protection:

• POS systems cannot initiate connections to office computers.
• POS systems cannot access guest or camera networks.
• Firewall and endpoint alerts are reviewed.
• Incident-response procedures are initiated.

Validation: Test permitted and denied connections using approved test endpoints.

Use Case 3: Camera compromise

Scenario: An IP camera is compromised.

Expected protection:

• Camera communication is restricted to the NVR and required services.
• Cameras cannot access POS and accounting networks.
• Camera management is restricted.
• Logs and network events are reviewed.

Use Case 4: ISP outage

Scenario: The primary ISP connection fails during restaurant operating hours.

Expected protection:

• Nagios detects loss of external connectivity.
• Administrators receive an alert.
• An approved secondary WAN connection can be activated if configured.
• POS offline procedures follow payment-provider requirements.

Use Case 5: Accounting ransomware

Scenario: An office computer is infected with ransomware.

Expected protection:

• Office systems are segmented from POS and cameras.
• Backups are protected and tested.
• Unauthorized access to server resources is blocked.
• Incident response includes isolation, investigation and recovery.

11. Security and Operational Policies

The network design must be accompanied by operational controls.

11.1 Administrative access

• Use named administrator accounts.
• Enable MFA for Meraki Dashboard and other administrative services.
• Remove default credentials.
• Use unique passwords for switches, APs and NVRs.
• Restrict remote management.
• Review administrative access quarterly.
• Record all configuration changes.

11.2 Backup and recovery

Back up:

• Meraki configuration information and network documentation.
• D-Link switch configurations.
• AP configuration.
• NVR configuration.
• Nagios configuration.
• Syslog configuration.
• Server data and business-critical application data.

Test recovery procedures periodically. A backup that has never been restored is not a verified recovery capability.

11.3 PCI DSS considerations

The payment environment must be designed and operated according to the restaurant's actual payment architecture and applicable PCI DSS obligations.

Network segmentation can reduce the scope of the cardholder data environment, but it does not automatically establish PCI DSS compliance.

The restaurant should confirm its payment architecture and validation requirements with its acquiring bank, payment processor and, where appropriate, a qualified security assessor.

12. Deployment Plan

Phase	Activity	Deliverable
1	Site survey and inventory	Existing network assessment
2	ISP bridge configuration	Verified WAN connection
3	MX installation	Firewall and routing operational
4	Core switch installation	VLANs and trunks operational
5	PoE switch installation	APs and cameras connected
6	Firewall configuration	Approved segmentation rules
7	Wireless deployment	Staff and guest networks operational
8	Nagios deployment	Monitoring and alerting operational
9	Central logging	Syslog collection and retention
10	Security validation	Test report and remediation list
11	Documentation and handover	As-built package
12	Managed support	Operational service agreement

Production deployment should be scheduled outside peak restaurant operating hours. Maintain a rollback plan and a documented process for restoring the previous network configuration.

13. Deployment Acceptance Checklist

The following checklist is intended for joint sign-off by the implementation engineer and restaurant representative.

13.1 WAN and firewall

• ISP bridge mode confirmed, or approved alternative documented.
• MX receives the expected WAN address.
• Internet connectivity verified.
• DNS resolution verified.
• MX firmware and licence status checked.
• MFA enabled for administrative accounts.
• Firewall rules reviewed and approved.
• WAN failover tested, if included.

13.2 Switching and VLANs

• Core switch installed and labelled.
• PoE switch installed and labelled.
• All VLANs created.
• MX-to-core trunk verified.
• Core-to-PoE trunk verified.
• Access ports assigned correctly.
• Unused ports disabled or secured.
• Switch configuration backups saved.
• Management access restricted.

13.3 POS and business systems

• POS endpoints connected to VLAN 10.
• Payment processor connectivity verified.
• Accounting endpoints connected to VLAN 20.
• Unauthorized POS-to-office traffic blocked.
• POS vendor remote-support requirements documented.
• Business applications tested.

13.4 Wi-Fi

• Employee SSID operational.
• Guest SSID operational.
• Guest isolation verified.
• Internal network access blocked from guest devices.
• AP management restricted.
• Coverage tested in dining and kitchen areas.
• Wi-Fi credentials securely handed over.

13.5 Cameras and PoE

• Cameras assigned to VLAN 50.
• NVR connectivity verified.
• Camera-to-POS access blocked.
• PoE power budget verified.
• UPS operation verified.
• Video recording and playback tested.
• Camera administration restricted.

13.6 Monitoring and logs

• Nagios server operational.
• MX monitoring operational.
• Switch monitoring operational.
• AP monitoring operational.
• NVR and camera availability monitored.
• WAN outage alert tested.
• Syslog collection verified.
• Log retention policy documented.
• Alert delivery tested.

13.7 Documentation and handover

• Physical network diagram delivered.
• Logical network diagram delivered.
• VLAN/IP addressing register delivered.
• Firewall rule matrix delivered.
• Switch port map delivered.
• PoE budget delivered.
• Device inventory delivered.
• Configuration backups delivered securely.
• Administrator access handed over.
• Incident-response contacts documented.
• Customer acceptance signed.

14. Suggested Service-Level and Operational KPIs

KPI	Suggested target
Core network availability	99.9% monthly target, subject to ISP and maintenance exclusions
WAN outage detection	Within 2 minutes
Critical infrastructure alert	Within 5 minutes
Critical incident acknowledgement	Within agreed support SLA
Configuration backup	After approved changes and scheduled intervals
Monitoring coverage	100% of designated critical infrastructure
Quarterly security review	Completed and documented
Backup recovery test	At least annually, preferably more frequently for critical systems
Firewall rule review	Quarterly and after material changes

These are proposed operational targets, not guaranteed service commitments.

15. Strategic Roles of the Three Organizations

15.1 KeenComputer.com — Implementation and Managed IT

KeenComputer is the implementation and operational support partner.

Responsibilities:

• Restaurant network assessment.
• ISP and Meraki MX deployment.
• D-Link switch configuration.
• VLAN and firewall implementation.
• Wi-Fi and camera installation.
• Nagios monitoring.
• Log management.
• Backup and recovery planning.
• Security maintenance.
• Managed network support.

Commercial positioning: Secure, reliable and monitored restaurant IT operations.

15.2 IAS-Research.com — Architecture, Engineering and Validation

IAS-Research provides the engineering and research capability behind the architecture.

Responsibilities:

• Network architecture design.
• Security and threat modelling.
• Segmentation and access-control validation.
• Monitoring and log-analysis design.
• Network performance studies.
• Reliability and failure analysis.
• Technical documentation and research.
• Future AI-assisted operations.

Commercial positioning: Engineering-led IT architecture, cybersecurity research and technical assurance.

15.3 KeenDirect.com — Digital Commerce and Business Integration

KeenDirect supports the restaurant's digital business environment.

Potential services:

• Restaurant website and online ordering.
• E-commerce and digital payment integration.
• Menu and product management.
• Customer relationship management.
• Marketing automation.
• Inventory and order integration.
• Analytics and business reporting.

Commercial positioning: Connect restaurant operations with digital sales and customer engagement.

16. Final Recommendation

The proposed design should be implemented as a managed and documented business network rather than a collection of independently installed devices.

The most important architectural decision is to make the Meraki MX the central policy-enforcement point, use managed D-Link switches for VLAN distribution, and maintain separate networks for POS, office, staff, guests, cameras and infrastructure management.

Nagios and centralized logging provide visibility into service availability and network events. They should be combined with secure configuration management, tested backups, endpoint protection and a defined incident-response process.

The implementation package can become a repeatable KeenComputer restaurant-network offering, with IAS-Research providing architecture and validation and KeenDirect extending the service into online commerce.

Proposed service name: Restaurant Secure Network & Operations Package

Core promise: Protect payment systems, separate business networks, secure customer Wi-Fi, monitor infrastructure and establish a maintainable IT environment.

End of Implementation Package

Important engineering decisions before deployment

Three details should be confirmed before turning this reference design into device-specific configurations:

1. Meraki MX model: The model determines available WAN interfaces, throughput, security features, firmware capabilities and configuration options.
2. D-Link switch models and revisions: The exact DGS-1210-28, DGS-1210-28P or DGS-1210-28MP hardware revision determines the available VLAN, trunk, SNMP, syslog and PoE features.
3. POS and payment architecture: The payment processor's required destinations and connectivity rules determine the actual POS firewall policy.