Network Firewall
Next-generation firewalls that inspect traffic, apply application-aware policy and integrate with your wider security stack.
Control what enters, leaves and moves through your network
A firewall manages traffic between your business, the internet, your sites and your users. Over time rule sets get messy - old rules stay, exceptions build up and no one is sure what any given rule is for.
- Reduces services accidentally exposed to the internet
- Protects branch offices and remote sites
- Underpins clean, safe remote access
- Firewall rules are reviewed on a regular cycle
- Access that is no longer needed is removed
- Logs and alerts are actively monitored
When was your firewall rule set last reviewed and cleaned up?
Ask us for a firewall and perimeter review.
Understanding network firewall
Modern firewalls aren't just port-blockers. They identify applications, decrypt traffic where appropriate, run IPS, integrate with identity, and enforce SD-WAN policy - all from a unified dashboard. We design, deploy and manage Fortinet, Sophos and Palo Alto firewalls across UK offices, with monitoring and tuning included.
- Cyber Essentials & Cyber Essentials Plus
- ISO 27001:2022 Annex A controls
- NCSC 10 Steps to Cyber Security
- CIS Critical Security Controls v8
What we deploy and run
The concrete controls Telappliant configures, manages and reports on.
Network Firewall as run by a UK SOC and engineering team.
Next-gen firewall with application awareness, not just IP/port rules.
Integrated IPS and threat feeds updated automatically.
TLS inspection where appropriate and legally compliant.
Identity-aware policies sourced from Microsoft Entra.
High-availability pairs and clean failover.
Centralised management, monitoring and quarterly rule review.
Why Telappliant
What you get with us that you don't get with the alternatives.
Delivered by a UK SOC and engineering team - no offshored ticketing.
Vendor-agnostic. We pick the right tool for your estate, then run it for you.
Mapped to Cyber Essentials, ISO 27001 and the NCSC 10 Steps from day one.
Fixed monthly price - no surprise hourly bills when something goes wrong.
The outcomes for your business
What changes for your team, your auditors and your insurer.
Stop network-level attacks at the perimeter.
Single managed platform across multiple sites.
Clean rulebase - quarterly review, not 10 years of build-up.
Foundation for SD-WAN and Zero Trust expansion.
Measured outcomes, not promises
3000+ UK organisations served and 100000+ end users supported.
< 60 minute average response on security incidents.
4000+ tickets resolved every month with measurable first-time-fix rates.
Vendor-fluent, not vendor-locked
We pick the right tool for your estate, then run it for you.
Trademarks are the property of their respective owners. We have no affiliation unless stated on our partners page.
Use cases
How this capability fits at different scales.
Replace an ageing SonicWall with a managed FortiGate, monitored 24/7.
Standardise firewalls across HQ and branches with central management.
Segmentation and policy controls for PCI, FCA or NHS environments.
How this applies to organisations like yours
Recent situations we've worked through with UK businesses - find the one closest to yours.
Situation. Branch firewalls each managed by a different historic IT supplier with no consistent policy.
Outcome. Single FortiManager-style estate, one ruleset, branch deployments in hours not weeks.
Situation. Flat network where the production line shared the same subnet as office laptops.
Outcome. OT/IT segmentation with east-west inspection; a phishing-borne worm could no longer reach the PLCs.
Situation. Guest Wi-Fi and back-office EPOS sharing the same WAN circuit and ACLs.
Outcome. Proper zone separation plus QoS; passed PCI scoping and stopped guest devices stealing bandwidth.
Situation. Inherited firewall ruleset of 1,400 lines, nobody knew what was safe to remove.
Outcome. Rule audit and clean-up cut the rule base by 60% with no service impact.
Common questions
Related fundamentals & services
Microsoft 365 Security Hardening
Most SMEs already pay for the controls that cover network firewall. We help you turn Microsoft 365 Business Premium into a real security baseline - the front door into the wider Cyber Fundamentals portfolio.
Explore Microsoft 365 hardeningTalk to us about network firewall
A 30-minute call to scope what good looks like in your estate.
Talk to a UK technology partner who's done this for 20 years
Book a practical, no-pressure consultation. We'll review your current setup, show where AI communications, cloud telephony or managed IT could improve customer experience and reduce admin - and tell you straight if you don't need us.
- UK-based people, real account management
- Honest recommendations - even if it's not us
- Practical AI where it adds value, not hype
