How To Protect Your Business from Cyber Attacks with CISA’s Free Scanning Service

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Organizations seeking to reduce their risk of cyberattacks now have access to a surprisingly effective, no-cost vulnerability scanning service from the U.S. Cybersecurity and Infrastructure Security Agency (CISA). On Security Now, hosts Leo Laporte and Steve Gibson examined CISA’s Cyber Hygiene Services, explained how the program works, and shared why every organization with public-facing IP addresses should take advantage immediately.

What Is CISA’s Internet Vulnerability Scanning—and Who Is It For?

CISA’s free Cyber Hygiene Services provide continuous, automated scanning of any internet-accessible assets you control. This service is aimed at critical infrastructure, government, and commercial organizations—including small and mid-sized teams with assigned IP addresses, not just big names.

As Steve Gibson explained, the process starts with a simple sign-up. Organizations authorize CISA to scan their network perimeters (public IPs) for known vulnerabilities, outdated encryption, and other misconfigurations that expose you to real-world threats. These findings are delivered via password-protected reports—direct to your inbox, on a regular schedule.

How the Scanning Service Works: What Gets Checked

When you enroll, CISA will:

• Continuously probe your public IP space for open ports, exposed services, and risky configurations
• Focus on popular attack vectors: web servers, VPNs, remote access services, and vulnerable protocols
• Prioritize findings: high-severity holes get more frequent scans
• Inform you about issues linked to ransomware trends, known exploits, and weak encryption suites

Importantly, CISA doesn’t access your internal network, data, or private systems—it just checks what you already expose to the world. Findings are confidential and intended for your remediation, not for regulatory reporting.

Why CISA’s Free Scanning Is a Game-Changer

According to Steve Gibson on this week’s episode, the real value is having “another set of eyes” discover missteps—even the ones your team might overlook. He described his experience: after enrolling his small business (GRC), the first scan from CISA flagged support for outdated cryptographic ciphers, reminding him to tighten his web server configurations. The alert wasn’t catastrophic, but, as he noted, you want to catch these issues before attackers do.

Organizations typically see a 40% reduction in asset risk/exposure within a year, with improvements evident in 90 days. Many security insurance providers accept CISA’s reports instead of expensive annual third-party scans.

Who Should Sign Up? Is There a Downside?

The hosts emphasized that any organization with multiple public IPs, dedicated hosting, or significant network infrastructure should opt in. You don’t need to be a government entity. If you control your IP blocks (not just home consumers), you qualify. All it takes is someone in an official role (CIO, CISO, IT manager) to request the service and confirm authorization.

Some hesitate due to privacy or fear of government oversight—but the reality is, anything CISA finds is already visible to every global attacker scanning for weak spots. The crucial difference: CISA is on your side and provides the fix before you’re exploited.

How to Get Started with CISA’s Cyber Hygiene Service

• Visit CISA’s Cyber Hygiene Services page
• Fill out a brief application—basic details and the public IP addresses you want scanned
• Wait for confirmation and your first scheduled scan (usually within a week)
• Receive detailed, actionable reports regularly (and in urgent cases, immediate alerts)
• Remediate findings and repeat the process for ongoing hardening

What You Need to Know

• Free for U.S.-based organizations (government, commercial, critical infrastructure)
• Continuous external attack surface monitoring: Not just a one-time scan
• Finds risky configurations that are missed by internal-only assessments
• Reports include severity, known exploit and ransomware status, affected services, and recommended fixes
• Alerts you to old, weak ciphers and public-facing misconfigurations before attackers do
• Complements (or can replace) costly 3rd-party scans, meeting requirements for insurers/auditors
• No internal access, data sharing, or privacy intrusion—only public-facing checks

The Bottom Line

On Security Now, Steve Gibson outlined that CISA’s free Cyber Hygiene vulnerability scanning is one of today’s most practical, risk-reducing steps for organizations with internet-facing assets. It helps you proactively plug holes—often those you didn’t realize existed—before they become real incidents. For most teams, there’s simply no good reason not to enroll.

Subscribe for more essential cybersecurity strategies: https://twit.tv/shows/security-now/episodes/1070