Router firewall
Built-in filtering on a business router.
- Small offices and shops
- Basic port and site control
- Low cost
Sophos · FortiGate · Cisco · Network security
Firewall, VPN and network-security systems
Protect users, servers, branches and remote access with security sized around inspected throughput, applications, encrypted traffic, subscriptions, identity, availability and operational response.
How a firewall protects you
Every connection is checked before it reaches your network
The firewall sits between the internet and your office, inspects traffic and keeps each part of the network in its own zone.
- 1. Inspect trafficChecks every connection for malware, intrusions and unsafe websites.
- 2. Separate zonesStaff, guest Wi-Fi, CCTV and servers cannot reach each other freely.
- 3. Connect securelyBranches and home workers join over encrypted VPN tunnels.
- 4. Log and alertReports show blocked threats, bandwidth use and who connected.
Choose the right protection
Router, UTM firewall or next-gen firewall?
Match the device to your users, branches and how much traffic needs deep inspection.
UTM firewall
One box for firewall, VPN, antivirus and web filtering.
- Offices, schools, hotels
- Site-to-site & remote VPN
- Subscriptions for updates
Next-gen firewall
Application control and deep inspection at higher speeds.
- Multi-branch businesses
- Encrypted traffic inspection
- High availability pairs
Sizing depends on inspected throughput, not just internet speed. Planning the LAN too? See managed switching.
System planning
Select security by inspected workload—not internet speed alone
Real capacity depends on enabled inspection, encrypted traffic, VPN use, user count, sessions, interfaces, high availability and future growth.
Business internet edge
Policy, inspection, web access, application visibility and secure publication of services.
Branch and remote connectivity
Encrypted site-to-site links and controlled remote-user access with documented permissions.
Internal segmentation
Reduce unnecessary access between users, servers, CCTV, guests, IoT and management networks.
Verified selection points
What Zerolink confirms before quotation
Exact specifications depend on the selected product, capacity and system architecture.
Throughput under security servicesFirewall, threat protection, SSL inspection and VPN performance are checked for the intended policy.
Interfaces and WAN designPort speeds, multiple internet links, failover, public addressing and routing are documented.
Identity and access policyUsers, groups, devices, applications and administrative roles are mapped to least-required access.
VPN architectureBranches, remote users, authentication, address plans and permitted resources are designed.
Licensing and updatesRequired subscriptions, support, security services and renewal responsibilities are stated clearly.
Logs, backup and responseConfiguration backup, time, alerts, retention, review and incident-response responsibilities are agreed.
Official product reference: Fortinet FortiGate next-generation firewall portfolio. Exact products, specifications, licensing, capacity and warranty are confirmed in the final quotation.
Related Zerolink expertise
Connect this system with the wider solution
Product selection works best when connectivity, infrastructure, security and deployment responsibilities are considered together.
Business infrastructure
Review integrated network, security, communication and deployment capabilities.
Business leased line
Pair the firewall with dedicated, symmetric internet and a static IP.
Requirement discovery
Share the site, workflow, capacity and support requirements before quotation.
Frequently asked questions
Questions about Firewall & VPN
Clear answers to common planning and selection questions.
Do small businesses need a firewall?
Yes. A business firewall blocks threats, controls internet use, separates guest and staff networks and securely connects branches.
What is a site-to-site VPN?
It links two offices over the internet through an encrypted tunnel, so staff use shared files and software as if on one network.
Can staff work securely from home?
Yes. Remote-access VPN with strong authentication lets approved users reach office systems safely.
Need to secure a new network or replace an ageing firewall?
Share internet speeds, users, sites, applications, VPN needs and current security subscriptions for assessment.
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