What is network security for businesses?

Network security for businesses encompasses all the policies, tools, and controls designed to protect your IT infrastructure from unauthorised access, misuse, and attack. This includes firewalls, intrusion detection, VPNs, network segmentation, DNS filtering, vulnerability scanning, and monitoring. Coreitech provides fully managed network security for London businesses — covering design, implementation, and ongoing monitoring.

How much does network security cost for a London business?

Managed network security starts from around £8/user/month as an add-on to our managed IT service. Standalone network security monitoring starts from £500/month for smaller businesses. Firewall management, VPN configuration, and vulnerability scanning are available as fixed-price engagements — contact us for a scoped quote.

Do you manage firewalls for businesses?

Yes. Coreitech manages business firewalls from Fortinet, SonicWall, Cisco, and Palo Alto. Our service covers firewall policy audits, rule optimisation, firmware updates, threat intelligence feeds, and real-time alerting. We can manage your existing firewall or supply and configure a new one.

What is network segmentation and why does it matter?

Network segmentation divides your network into isolated zones (VLANs) so that if an attacker or malware compromises one device or segment, they cannot easily move laterally to other systems. It is a key requirement for Cyber Essentials Plus and is increasingly required by cyber insurers. Coreitech designs and implements VLAN-based segmentation for businesses of all sizes.

Can you help with network security for remote workers?

Yes. We implement secure remote access solutions including SSL VPN, Microsoft Azure VPN Gateway, and zero-trust network access (ZTNA) via Entra ID Conditional Access. All remote connections are protected by MFA enforcement and endpoint compliance checks managed through Microsoft Intune.

Quick Answer

Network security London — managed firewall, IDS/IPS, VPN, DNS filtering & 24/7 network monitoring for London businesses. Coreitech: 4.9★, Microsoft Partner. Call 0203 834 9728.

NETWORK
SECURITY
LONDON

Managed network protection · 24/7 monitoring · Microsoft Partner

Coreitech provides fully managed network security for London businesses — from firewall management and IDS/IPS monitoring to VPN, DNS filtering, vulnerability scanning, and network segmentation. All designed, implemented, and monitored by our certified network security engineers.

Firewall management — Fortinet, SonicWall, Cisco

IDS/IPS — intrusion detection & prevention

DNS filtering — malware & phishing protection

VPN & zero-trust remote access

Network vulnerability scanning

VLAN segmentation & micro-segmentation

24/7 network traffic monitoring

SD-WAN security for multi-site businesses

Call 0203 834 9728 Free Network Audit

Network Security — Pricing

Managed Network Security

Add-on to managed IT

From £8/user/mo

Standalone Monitoring

Network-only contract

From £500/mo

Firewall Management

Per firewall appliance

From £150/mo

Vulnerability Scanning

Quarterly or on-demand

From £500

Network Security Audit

Full architecture review

From £1,500

4.9★

Google Rating

24/7

Monitoring

200+

UK Clients

— Network Security Services

Managed network security services for London businesses

Firewall Management

Managed Fortinet, SonicWall & Cisco ASA firewalls — rule audits, firmware updates, threat policy tuning and 24/7 alerting.

Secure Wi-Fi Architecture

Enterprise Wi-Fi design (Cisco Meraki, Ubiquiti, Aruba) with SSID segmentation, guest isolation, and WPA3 enforcement.

Network Monitoring & Detection

24/7 network traffic analysis, anomaly detection, and intrusion detection (IDS/IPS) across all network segments.

VPN & Secure Remote Access

Site-to-site VPN, SSL VPN, and zero-trust network access (ZTNA) for secure hybrid and remote working.

Vulnerability Scanning

Regular internal and external network vulnerability scans with prioritised remediation reports. Required for Cyber Essentials Plus.

Network Segmentation

VLAN design, micro-segmentation, and network access control (NAC) to limit lateral movement in the event of a breach.

DNS Filtering & Web Protection

DNS-layer threat protection blocking malware, phishing, and C2 communications before they reach endpoints.

SD-WAN Security

Secure SD-WAN deployment with integrated next-gen firewall capabilities for multi-site businesses.

— Why network security matters

Network threats facing London businesses in 2026

Most cyber breaches start at the network layer. Unpatched firewalls, open ports, misconfigured VPNs, and unsegmented networks are among the most common attack vectors. Coreitech's network security service closes these gaps with proactive monitoring, regular vulnerability scanning, and expert firewall management.

For businesses subject to Cyber Essentials Plus, network security controls — including boundary firewalls, access controls, and vulnerability management — are assessed by an independent auditor. Our team ensures you pass first time.

— Why Coreitech

Why London businesses choose us for network security

Certified network engineers — CCNA, Fortinet NSE, Microsoft

Vendor-agnostic — we manage any firewall or network stack

Proactive monitoring — issues fixed before they cause downtime

Cyber Essentials Plus compliance — network controls assessed

24/7 alerting — critical threats escalated immediately

Fixed monthly pricing — no per-incident billing

— FAQ