If your small office has a firewall or VPN gateway and no one is actively maintaining it, a managed firewall service may be the missing piece. A managed firewall means your IT provider handles firmware patching, security rule reviews, VPN hardening, log monitoring, and configuration backup, so the device that guards your network perimeter stays secure. The Canadian Centre for Cyber Security's Baseline Controls (BC.9) recommend dedicated firewalls at the boundary between corporate networks and the internet; managed services ensure those firewalls stay current.

This article covers what a firewall does for a small office, what "managed" adds, and the signs that your business would benefit from the service.

What does a firewall actually do for a small office?

A firewall sits between your internal network and the internet. Its job is to control what traffic can enter and leave. For a small office, this typically means:

  • Blocking inbound connections that were not initiated from inside, so random scans and exploit attempts from the internet cannot reach your workstations.
  • Allowing outbound connections for web browsing, email, and cloud services while optionally filtering known malicious destinations.
  • Terminating VPN connections for remote workers, so they connect securely rather than exposing services directly to the internet.
  • Logging traffic for troubleshooting and, in some cases, security investigation.

The CCCS Baseline Controls put it plainly: "Networks connected to the Internet require protection from online threats through the use of firewalls" (BC.9.1). For most small offices, the firewall is the first and often only layer of perimeter defense.

What is the difference between a router firewall and a business firewall?

Consumer routers include basic firewall functions (NAT, port blocking), but business firewalls add capabilities a small office needs: VPN termination, stateful inspection, intrusion prevention, application control, and centralized logging.

The practical differences:

  • VPN support: Business firewalls (FortiGate, SonicWall, Palo Alto, Sophos, Cisco Meraki, etc.) can terminate SSL VPN or IPsec tunnels so remote staff connect securely. Consumer routers either lack this or implement it poorly.
  • Security updates: Business firewalls receive regular firmware updates with security patches. Consumer routers often stop receiving updates within a year or two of purchase, and even when updates exist, many are never applied.
  • Logging and visibility: Business firewalls log traffic, which helps diagnose problems and supports compliance requirements. Consumer routers rarely expose useful logs.
  • Rule granularity: Business firewalls let you control traffic by application, user, time of day, or destination category. Consumer routers offer all-or-nothing port rules.

If your office runs a consumer router without VPN or logging, it may be time for an upgrade. If you already have a business firewall but no one is maintaining it, the gap is operational, not hardware.

What does "managed" add?

A managed firewall service means your IT provider or managed security provider handles the maintenance, monitoring, and updates for your firewall. You own (or lease) the hardware; they keep it secure. Typical coverage includes:

  1. Firmware patching: Applying vendor security updates as they are released. Edge devices like firewalls and VPN gateways are high-value targets; unpatched devices are exploited quickly. See below for what happens when firmware is not patched.
  2. Rule reviews: Periodically auditing firewall rules to remove stale entries, tighten overly permissive rules, and ensure the configuration matches current needs.
  3. VPN and remote access hardening: Configuring SSL VPN or IPsec with strong authentication (ideally multi-factor), limiting access by user or group, and disabling legacy protocols.
  4. Logging and alerting: Forwarding firewall logs to a central location, reviewing alerts for suspicious activity, and notifying you when something needs attention.
  5. Configuration backup: Keeping a current backup of the firewall configuration so recovery after hardware failure or misconfiguration is fast.

For a small office without dedicated IT staff, this is the difference between a firewall that is nominally present and one that is actively protecting the network.

What happens if the firmware is not patched?

Unpatched firewalls and VPN gateways are among the most exploited devices on the internet. The CISA Known Exploited Vulnerabilities (KEV) catalog tracks vulnerabilities that are actively being used in attacks, and edge devices appear frequently. Fortinet, Cisco, SonicWall, Palo Alto, and Citrix have all had critical firewall or VPN flaws added to the KEV with short remediation deadlines.

Our coverage of the FortiBleed credential campaign illustrates the pattern: attackers exploited older, already-patched Fortinet vulnerabilities (CVE-2022-40684, CVE-2023-27997, CVE-2024-55591) to steal firewall configuration files and password hashes. Organizations that had never patched, or patched but never rotated credentials, fed that campaign. The result was 73,932 exposed firewall and VPN URLs across 194 countries.

A managed firewall service closes this gap. When a vendor releases a security patch, your provider applies it, not months later when someone remembers, but on a schedule that reflects the actual risk.

Signs you need a managed firewall

Consider managed firewall services if any of these apply to your small office:

  • You have a remote access VPN. Remote employees or contractors connect to your network from outside the office. The VPN is internet-facing and needs regular patching and hardening.
  • You handle regulated data. PCI DSS, HIPAA, PIPEDA, or industry requirements expect you to maintain firewall controls. A managed service provides documentation and consistency.
  • You have no in-house IT. No one is checking for firewall firmware updates, reviewing rules, or monitoring logs. The device is running on autopilot.
  • Your firewall is past end of support. The vendor no longer releases security updates. Managed service providers can help plan a replacement and ensure the new device is properly configured.
  • You have been told to "segment the network" but do not know what that means. A managed firewall provider can help isolate sensitive systems (point of sale, financial data, guest Wi-Fi) as the CCCS baseline recommends.

What to ask an IT provider about managed firewall services

If you are evaluating managed firewall services, ask these questions:

  1. How quickly do you apply critical firmware patches? Look for a defined SLA, not "when we get to it."
  2. How often do you review firewall rules? Annual review is a minimum; quarterly is better for dynamic environments.
  3. What happens when my firewall hardware fails? Understand the replacement process and whether a spare is available.
  4. Can I see the logs? You should have access to firewall logs, or at least summaries, for your own records.
  5. Is the management interface exposed to the internet? It should not be. Ask how administrative access is secured.

The CCCS baseline (BC.9.3) recommends "VPN connectivity with two-factor authentication for all remote access into corporate networks." Confirm that your provider configures VPN access with MFA, not just username and password.

One question to ask your IT lead this week

When was the last time our firewall firmware was updated, and who is responsible for keeping it current?

If the answer is unclear, or if no one knows, that is the gap a managed firewall service closes. A ten-minute conversation now is cheaper than an incident response engagement later.

If you are unsure where your network perimeter stands, our free cybersecurity assessment takes about five minutes and covers firewall and remote access controls as part of 22 critical security areas.

This article is intended for general informational purposes only and does not constitute professional security, legal, or compliance advice. Recommendations are based on publicly available guidance from the Canadian Centre for Cyber Security's Baseline Controls, CISA's Known Exploited Vulnerabilities catalog, and vendor documentation as of the date of publication. Organizations should consult qualified cybersecurity professionals before making operational changes based on this article.