Reduce your exposure. Strengthen your defences. Stay one step ahead.

Every system exposed to the internet is a potential entry point. If it is not secured, misconfigured or up to date, it increases your risk and gives attackers an opening.

Attack surface management (ASM) is the process of identifying, reducing and continuously monitoring every public-facing component of your business. At LeftBrain, we help you tighten your defences and stay in control of what is exposed.

What is attack surface management?

Your attack surface is the sum of all the points where someone could try to gain access to your systems or data. This includes cloud services, web apps, email portals, remote devices and misconfigured servers.

Attack surface management helps you:

• Discover what is publicly accessible
• Identify weak points like outdated software or open ports
• Secure misconfigured or forgotten services
• Monitor continuously for changes or vulnerabilities
• Reduce the chances of compromise through proactive defence

It is a core part of any modern cyber security strategy, especially for businesses with remote teams and cloud-based systems.

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Why it matters

Most businesses rely on dozens of connected services.

That means more complexity and more opportunities for exposure.

Without ASM, you may not know:

• What services are currently internet-facing
• Which apps or ports are accidentally left open
• Whether cloud accounts are misconfigured
• If employee devices are properly secured
• Whether anything has changed since your last audit

ASM gives you visibility, control and a plan for continuous improvement.

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What we do

LeftBrain takes a practical approach to managing your attack surface. We combine technical hardening, tooling, process and continuous monitoring to help you reduce risk.

Discovery and mapping

We begin by mapping your entire external footprint. That includes:

• Servers and services exposed to the internet
• Web apps and login pages
• APIs, developer tools and test environments
• Cloud assets linked to your domain
• Third-party connections or platforms you may have forgotten

We provide a clear report of what is visible and what needs to be secured.

Hardening your infrastructure

We secure the points that need to remain public and remove or lock down the ones that don’t. This can include:

• Configuring firewalls and access rules
• Deploying reverse proxies or tunnels (e.g. Cloudflare)
• Enforcing multi-factor authentication on login pages
• Hiding admin portals or limiting access by IP
• Reducing privilege levels across tools and platforms

Every change makes your business harder to scan, guess or attack.

Endpoint and device management

Your team’s devices are part of your attack surface. We ensure:

• Every laptop or desktop is enrolled in mobile device management
• Policies are applied to both work and BYOD devices
• Devices are kept up to date and protected with endpoint detection tools
• Access is logged, encrypted and controlled

Even remote and hybrid teams stay secure with the right configuration.

SaaS and cloud configuration checks

We review your cloud tools to find weak spots such as:

• Publicly shared documents
• Over-permissioned users or accounts
• Open APIs
• Insecure integrations or third-party apps
• Weak MFA or identity configurations

We align your SaaS controls with best practice and certification frameworks.

Continuous monitoring

Attack surface management is not just a one-time audit.

We can configure tools that alert you when:

• New services or ports appear online
• DNS records are changed
• Certificates expire or misconfigure
• Vulnerabilities are discovered in software versions you use

You stay ahead of attackers by knowing what they would see first.

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Our process

Step 1: Assess and discover

We map your environment and identify your exposed assets.

Step 2: Prioritise and harden

We help you decide what to close, what to protect, and what to monitor.

Step 3: Fix and secure

We implement or guide your internal teams through securing every asset.

Step 4: Monitor and maintain

We help you keep it all up to date, with clear alerts and follow-up support.

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What this unlocks for your business

For IT and security leads

• A real view of your risk, based on what is actually exposed
• Better visibility across cloud, SaaS and device environments
• Clear actions with tools to track and manage changes

For leadership

• Lower chance of public breach or incident
• Fewer surprises in client audits or certification assessments
• A strong foundation for ISO 27001, Cyber Essentials or SOC 2

For fast-moving teams

• Secure growth without bottlenecks
• Confidence in your remote work setup
• A tech stack that is visible, monitored and under control

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Why LeftBrain

We combine technical depth with business awareness.

Our approach to ASM is structured, tailored and built to scale with your organisation.

You get:

• Clear documentation of your attack surface
• Support implementing technical controls
• Ongoing monitoring and advice
• Integration with your wider security and compliance strategy

“I’ve worked with LeftBrain for many years. The team really understands our working environment and does a great job of recommending what we need, when we need it. They resolve issues pretty darn quickly!”