How To Disable Firewall on Windows, Mac, and Linux?
A firewall is an essential network security device that monitors incoming and outgoing traffic and blocks potentially harmful…
A managed firewall is a firewall that a third party configures, monitors and maintains on your behalf. The hardware may sit in your rack or in the provider’s cloud; what you are buying is the operational responsibility, not the box.
The reason organisations buy it is rarely the technology. It is that a firewall left unmanaged degrades: rules accumulate, nobody removes the temporary ones, firmware falls behind, and alerts go unread because nobody is on shift at 3 a.m.
What a Managed Firewall Service Includes
| Service | What it means in practice |
|---|---|
| Initial design and deployment | Sizing, zone design, base ruleset, HA pair configuration, migration from the existing device |
| Rule changes | You raise a request, they implement it. Check the SLA and whether there is a monthly quota. |
| Patching and firmware | Security updates applied in a maintenance window, the single most commonly neglected task in-house |
| 24/7 monitoring | Health, availability, and security alerting outside your working hours |
| Log retention | Centralised storage, often the compliance driver for buying the service |
| Threat signature updates | IPS, antivirus, URL filtering and application signatures kept current |
| Reporting | Monthly summaries of traffic, blocked threats, rule changes, and policy drift |
| Incident response | Varies enormously, from “we email you” to full containment. This is the clause to read carefully. |
| Backup and recovery | Configuration backups and a tested restore procedure |
Deployment Models
- On-premises, provider-managed. A physical appliance in your rack that the provider administers remotely. You keep local traffic inspection and low latency; they keep the login.
- Cloud-hosted (FWaaS). Traffic is routed to the provider’s cloud for inspection. Scales without hardware and suits distributed sites and remote workers; adds latency and a hard dependency on the connection to the provider.
- Virtual appliance in your cloud. A firewall VM in your AWS, Azure or GCP environment, managed by the provider. Common for organisations with substantial cloud footprints.
- Hybrid. On-premises hardware for site traffic, cloud inspection for remote users. Increasingly the default as SASE offerings mature.
Realistic Costs
| Organisation size | Typical monthly range | Usually covers |
|---|---|---|
| Small business, single site | $150 – $600 | One appliance, business-hours support, basic reporting |
| Mid-size, several sites | $800 – $4,000 | HA pairs, 24/7 monitoring, IPS and content filtering, log retention |
| Enterprise | $5,000+ | Multi-site, SIEM integration, dedicated engineers, custom SLAs |
Compare against the honest in-house cost: appliance and licences amortised, plus a fraction of a security engineer’s salary, plus the on-call coverage you either fund or quietly do without. For most organisations under a few hundred staff, the managed option is cheaper than a genuine 24/7 in-house capability, and it is the 24/7 part that is expensive, not the box.
When It Makes Sense
Buy managed if
- You have no dedicated security staff, or one person who is also doing everything else.
- You need 24/7 coverage and cannot staff a rota.
- Compliance requires demonstrable log retention, change control and review evidence.
- Firmware and signature updates are already slipping, this is the most common honest reason.
- You are running multiple sites and want consistent policy across all of them.
Keep it in-house if
- You have a capable network security team already.
- Your rules change constantly and daily and a ticket-based SLA would obstruct you.
- Regulation or policy prevents third-party access to your infrastructure.
- Your environment is unusual enough that a standardised service will not fit it.
The Shared-Responsibility Gaps
This is where managed firewall relationships go wrong. Establish in writing, before signing:
- Who defines policy? Providers implement rules. Deciding what should be allowed between your business systems is your job, they do not know your applications.
- What is the change SLA, and is there a quota? “Four-hour response” for a standard change and “next business day” are very different operationally. Some contracts cap changes per month and bill beyond it.
- Emergency change process. How do you get a rule pushed at 2 a.m. during an incident, and who is authorised to request it?
- Does “monitoring” mean alerting or responding? Many contracts sold as monitoring send an email and stop there.
- Do you retain admin access? Read-only visibility at minimum. Being unable to see your own ruleset is a poor position during an incident.
- Log ownership and export. Can you pull raw logs into your own SIEM, and what happens to them when the contract ends?
- Exit process. How do you get the configuration out and move to another provider or in-house? Ask before you need to.
What a Managed Firewall Does Not Cover
The firewall is one control at one boundary. It does not address:
- Endpoint compromise, that is EDR’s job.
- Lateral movement inside a segment it does not sit between. See network security monitoring.
- Phishing and credential theft, which arrive over connections you already permit.
- Layer 2 attacks, ARP poisoning, rogue DHCP, MAC flooding, which happen below it.
- Identity and access management.
Buying a managed firewall and treating security as handled is the failure mode to avoid.
Questions to Ask a Provider
- Which vendor and model, and is the licensing included or passed through?
- What is the change SLA, and is there a monthly change limit?
- Who is on shift outside business hours, and where?
- How long are logs retained, in what format, and can I export them?
- Do I get read-only or full admin access to the device?
- What does your incident response actually do, notify, or contain?
- How often is the ruleset reviewed for unused and overly broad rules?
- What is your patching cadence, and how are emergency patches handled?
- How is the service tested? Do you support customer penetration testing?
- What is the offboarding process and how is the configuration handed back?
Frequently Asked Questions
Is a managed firewall the same as a firewall as a service?
Not quite. FWaaS specifically means the firewall runs in the provider’s cloud with your traffic routed to it. A managed firewall can equally be your own on-premises appliance that someone else administers.
Do I still need my own security staff?
Yes, someone must own policy decisions, approve changes, and act on escalations. The provider operates the control; they do not own your risk.
Is a managed firewall more secure than one I run myself?
Only if you would not otherwise patch it, review the rules, or watch the alerts. A well-run in-house firewall beats an averagely-run managed one. Most unmanaged firewalls are not well-run, which is the honest case for the service.
What happens if the provider has an outage?
With cloud-based inspection, your traffic path may be affected, ask what the failover behaviour is and whether it fails open or closed. With on-premises hardware the firewall keeps enforcing its current policy; you simply cannot get changes made.
Can I keep my existing firewall hardware?
Often yes, if it is a supported model still under maintenance. Providers prefer their standard platforms, so expect a discount for standardising and a premium for keeping something unusual.
How is it different from a hardware firewall I buy outright?
The device may be identical. What changes is who configures it, patches it, watches it and is contractually accountable when it is misconfigured.
