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CISA · KEV CATALOG
FEED Awaiting CISA Known Exploited Vulnerabilities feed → INFO Real-time advisories will appear here once connected → SHIELD Pre-emptive blocking · Reputation-based filtering → INTEL 8.5 billion known-bad IPs · Updated continuously → SCOPE Bi-directional enforcement · Inbound + outbound → UPTIME Autonomous operation · No analyst required → FEED Awaiting CISA Known Exploited Vulnerabilities feed → INFO Real-time advisories will appear here once connected → SHIELD Pre-emptive blocking · Reputation-based filtering → INTEL 8.5 billion known-bad IPs · Updated continuously → SCOPE Bi-directional enforcement · Inbound + outbound → UPTIME Autonomous operation · No analyst required →
VIEW ALL →
// NASDAQ:INTZ · PLANO,TX · SINCE 1983

Your tools chase
the breach.We stop the
connection.

Intrusion is a prevention-first cybersecurity company. The Shield portfolio blocks malicious network traffic before it reaches your network, using the Global Threat Engine and 8.5 billion IP and DNS combinations refined since 2001.

Detection is reactive. Alerts are late. Logs are forensics, not defense. Shield blocks bad traffic before it reaches your network - inbound, outbound, both directions, all the time. 20+ years of threat intelligence · No alert fatigue · No rip-and-replace

SHIELD · PROTECTION IN ACTION Illustrative · per protected network
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Block before detection Reputation-based pre-emptive defense Bi-directional enforcement 20+ years of threat intelligence No agents required Observe before you enforce
Block before detection Reputation-based pre-emptive defense Bi-directional enforcement 20+ years of threat intelligence No agents required Observe before you enforce
// THE PREVENTION GAP

Your stack is busy.
Attackers love busy.

Firewalls filter. EDR investigates. SIEM collects. MDR responds. All of it happens after the connection. Adversary infrastructure has already done its job by then.

// 01 · RECONNAISSANCE

Recon Goes Unanswered

Adversaries map your network for weeks before they strike. Your stack sees nothing until exploitation begins.

2x third-party breaches doubled YoY (Verizon DBIR 2025)
// 02 · ALERT FATIGUE

Alerts Drown the SOC

Detection tools generate noise faster than humans can triage. The signal that matters is buried.

$10.22M avg US breach cost (IBM 2025, record high)
// 03 · DWELL TIME

Dwell Time Compounds

Every minute an attacker remains uncontested, the blast radius grows. Detection asks how fast. Prevention asks why.

14 days global median dwell time (Mandiant M-Trends 2026)
// 04 · THE HUMAN ELEMENT

One Click Is All It Takes

A click. A credential. A misconfiguration. Shield blocks the connection that click was meant to open.

60% of breaches involve a human element (Verizon DBIR 2025)
Barry Cader
"They've gotta get past me first. They never do."
// Barry Cader · The Perimeter
// THE DIFFERENCE

Threat intelligence
that throws a powerful punch.

Most threat intel gives your team another dashboard to review. Shield applies intelligence directly to network traffic, blocking malicious and unknown communications before they turn into incidents.

// 01
See the Traffic
Inbound and outbound. Encrypted or not. Every connection, every direction.
// 02
Know the Reputation
Match against the Global Threat Engine. 20+ years of accumulated reputation. Not a shared feed. Ours.
// 03
Block the Sketchy
Bi-directional enforcement at line speed. Reputation-based pre-emptive blocking. No analyst tuning.
// 04
Bring the Receipts
Every blocked event logged with destination, ASN, and reputation reasoning. Exports to your SIEM.
DB Memorall
"I remember every IP that ever did you wrong. I never forget."
// DB Memorall · The Long Memory
// HOW SHIELD WORKS

An additive layer
that blocks first.

Shield doesn't replace your firewall, EDR, or SIEM. It sits in front of them, evaluating every connection against proprietary threat intelligence. Bad traffic never reaches your stack.

Shield deployment architecture Shield deploys inline between firewall and core switch, blocking malicious traffic before it reaches the internal network. SHIELD ARCHITECTURE INTERNET UNTRUSTED ZONE FIREWALL RULE-BASED FILTER ACTIVE SHIELD REPUTATION-BASED · BI-DIRECTIONAL CORE SWITCH INTERNAL ROUTING EDR SIEM MDR YOUR STACK CLEAN SURFACE MALICIOUS · BLOCKED LEGITIMATE · PASSED SHIELD STOPS BAD TRAFFIC. YOUR STACK GETS A CLEAN SURFACE.
Bi-Directional
North-south enforcement. Blocks inbound recon and outbound C2, exfil, and beaconing.
Proprietary
The Global Threat Engine. Not a shared feed. 20+ years of reputation data, billions of records.
Autonomous
No analyst tuning. No playbooks. Shield decides based on reputation and blocks at line speed.
Flow
"Bad traffic in, bad traffic out. Nothing moves without me seeing it."
// Flow · Bi-Directional Visibility
// THE SHIELD PORTFOLIO

Five platforms.
One protection model.

Deploy where you need it. Cloud, Shield OnPremise, endpoint. Monitor everywhere with Shield Sentinel. Manage from one console.

Enforcement
Stratus// Cloud-Native, AWS

Inline blocking for cloud workloads. Deploys in under an hour. No agents on assets.

  • Bi-directional traffic enforcement
  • Observe-only mode available
  • Scales horizontally with workload
Learn More →
Enforcement
Shield OnPremise// In-Network Appliance

Hardware appliance for in-network enforcement. Drops in front of the firewall. Syslog to your SIEM.

  • Bi-directional north-south blocking
  • Observe-only mode available
  • Syslog support for SIEM integration
Learn More →
Enforcement
Endpoint// Windows + Android

Reputation-based filtering on the device itself. Browser isolation works inside or outside perimeter.

  • North-south reputation filtering
  • ZTNA on Android devices
  • Activates with Entra ID
Learn More →
Monitoring
Sentinel// Visibility-Only

Pure visibility into traffic patterns and reputation matches. Sentinel monitors. It does not block, alert, or integrate with Shield Command Hub.

  • Network-wide traffic monitoring
  • Reputation matching, no enforcement
  • Standalone deployment
Learn More →
Management
Command Hub// Central Console

Single pane of glass for Stratus, Shield OnPremise, and Endpoint. Live event log, blocked-event reporting, role-based access. Exports CSV and Excel.

  • Manage all enforcement platforms
  • Three roles: Observer, User, Administrator
  • Real-time blocked-event log with context
Learn More →
Get Started
Not sure
which platform?

Most customers start with Stratus or Shield OnPremise for enforcement, then add Sentinel and Endpoint over time. Talk to an engineer about your environment.

Talk to an Engineer →
Browsr
"Every click. Every browser. Every device. I'm watching all of them."
// Browsr · The Endpoint Sentinel
// CHOOSE YOUR FIGHT

Choose your layer.
Keep your prevention.

Pick the path that matches what you are defending. Each one routes to the proof, deployment, and language built for that buyer.

★
For CISOs
Reduce risk. Prove due diligence. Stop explaining why more alerts is not a strategy.
For Security Leaders →
⚙
For IT Leaders
Add prevention without turning deployment into a hostage situation. Hours, not weeks.
For IT Operations →
⬢
For Security Engineers
Logs. Fields. Evidence. Reasons. Vibes are not proof.
For Engineering →
◆
For MSPs & MSSPs
Multi-tenant management. Margin protection. Turn prevention into a reportable, repeatable service.
For Partners →
⚡
For Public Sector
High-stakes environments where downtime is not a cute inconvenience. Led by a former U.S. Federal CIO.
For Government & SLED →
+
For Critical Infra
OT and SCADA blind spots covered without firewall complexity. Block C2 from compromised vendor connections.
For Healthcare & OT →
// FROM THE FIELD

Named.
Notarized. On the record.

Four voices on what Shield actually does in production.

" Channel Partner
We were impressed with Shield's accuracy in preventing a cyberattack within the first week of implementation that would have otherwise taken place on one of our largest customer's networks.
Desmond Spencer
CTO, InnerCore Technologies
" Channel Partner
Many companies rely heavily on firewalls and segmentation to protect OT and SCADA networks, but Intrusion helps cover blind spots without the same complexity or cost.
Fernando Lara
CEO & Co-Founder, Singular Security Inc.
" Independent Analyst
Shield does what it claims to do. We were very impressed with Shield's alignment with what Intrusion says it does.
Frank Oelschlager
Former Research VP, IDC
" MSP
Best threat intel available on the market today, bar none.
Greg Akers
MSP Owner
Tony Scott, President and CEO of INTRUSION Inc.
// LEADERSHIP
We built Shield because the cybersecurity industry has spent two decades teaching the world to react. Prevention is not just better. It is the only model that scales.
Tony Scott · President & CEO, INTRUSION Inc. · Former 3rd U.S. Federal CIO
// YEAH, BUT

Every smart buyer
asks the same five things.

Here are the short answers. Pick the one that's nagging at you.

We already have a firewall.
Good. Keep it. Shield is not here to cosplay as your firewall. We add reputation-based pre-emptive blocking that traditional firewalls do not deliver. Your firewall filters by rules. Shield blocks by reputation, before the rules ever get tested.
Won't this create more alerts?
No. Shield does not alert. It blocks. The bad traffic stops at the door. What lands in your console is a log of what we stopped, not a queue of things for your SOC to triage.
Will it break production?
Run it in observe-only mode first. See exactly what Shield would have blocked, with zero impact on production traffic. When the data convinces you, flip one switch.
Can you prove value fast?
A POV deploys in hours and produces real evidence in days. Not a quarter. Not a slide deck. Actual blocked-event data from your environment, with destination, ASN, and reputation reasoning per event.
How does this fit our existing stack?
As an additive layer in front of it. Shield does not replace your firewall, EDR, or SIEM. It sits in front of them, evaluating every connection so your stack works on a smaller, cleaner threat surface.
// TRY BEFORE YOU BUY

Run the reality check.

See exactly what Shield would have blocked, with zero impact on production traffic. When the data convinces you, flip one switch.

01

Deploy

Shield drops into your environment in hours, not weeks. No agents required for Stratus or Shield OnPremise.

02

Observe

Shield evaluates every connection. You see what would have been blocked, in real time, without disruption.

03

Enforce

When the data convinces you, switch from observe to enforce. The bad traffic stops. The legitimate traffic does not.

Request a POV → Talk to an Engineer

What you'll see in observe mode

  • ✓Every blocked connection, with destination and ASN
  • ✓Reputation match reasoning per event
  • ✓Outbound C2, exfil, and beaconing attempts
  • ✓Inbound recon and scanning attempts
  • ✓Per-device traffic logs
  • ✓Bandwidth by connection
// THE INTRUSION DEFENDERS

We Don't Play Nice
With Bad Traffic.

Cybersecurity is technical. Cybersecurity people are human. Meet the Intrusion Defenders, our way of explaining prevention to anyone, with or without a CISSP.
Flow, the bi-directional enforcer
Flow
// BI-DIRECTIONAL ENFORCER
Watches every connection in and out. Decides instantly. Doesn't ask twice.
DB Memorall, the long memory
DB Memorall
// THE LONG MEMORY
20+ years of reputation data. Remembers every bad actor. Forgets nothing.
Barry Cader, the perimeter
Barry Cader
// THE PERIMETER
Stands between your network and the open internet. Stops the sketchy stuff before it gets a foothold.
Browsr, the endpoint sentinel
Browsr
// ENDPOINT SENTINEL
Goes where your team goes. Reputation filtering on every device, in or out of the perimeter.
Enter the Defenders Hub →

Where do you want to start?

Every Shield deployment begins with a conversation. Pick the path that fits.

Request a POVBook a Meeting