Discover vulnerabilities automatically
Map open ports, identify unpatched services, and monitor SSL certificates from the outside in. Catcher24 gives you complete visibility into your external attack surface without requiring a single server agent.
Trusted by companies and organizations from various sectors: Catcher24 offers practical insights that are directly applicable.
What is infrastructure scanning?
Our external infrastructure - servers, firewalls, routers, and load balancers - is the first line of defense against automated botnets and targeted attacks. Infrastructure scanning maps this perimeter exactly as an external attacker sees it, looking for entry points like forgotten open ports or legacy services.
Operating entirely outside-in, our scanner requires no agents or daemon installations on your host machines. We perform comprehensive port mapping, service enumeration, and SSL/TLS validation to cross-reference your exposed tech stack against global CVE threat databases.
You get immediate visibility into your network’s security posture. We categorize findings by strict CVSS scores and provide sysadmin-friendly context, including recommended OS or service patch versions, so you can lock down your perimeter quickly.
What's included with our infrastructure scanner?
Continuous, agentless tracking of your network perimeter to ensure no service is left exposed or unpatched.
Perimeter check
Port & service discovery
Eliminate shadow IT. We automatically scan your domains and IPs to detect open ports, identifying exactly which services (e.g., SSH, FTP, exposed databases) are publicly accessible.
DNS check
Network vulnerability detection
Catch outdated software before it’s exploited. We interrogate your exposed services to detect legacy software versions and known CVEs across your operating systems and network daemons.
SSL Check
SSL & TLS monitoring
Never let a certificate expire unexpectedly. We continuously track certificate validity periods, detect weak cipher suites, and alert you to potential man-in-the-middle vulnerabilities.
How our infrastructure scanner works
Gain total network visibility in minutes. Add your targets, let our engine map your perimeter, and review prioritized network alerts.
100% Agentless mapping
Clear CVSS severity scoring
Actionable patch guidance
The importance of infrastructure scanning
Networks expand, ports get left open, and services become outdated. Continuous external monitoring is the only way to ensure your firewall rules and patch management are actually working.
Discover forgotten shadow IT
Prevent network-level breaches
Maintain robust compliance tracking
Customer success stories
While Catcher’s self-service tool offers powerful vulnerability scanning, our advanced integrations are only available with our managed service through trusted partners.
The automated web scanner checks to ensure our registration website is secure, and ESET endpoint protection keeps our workstations safe. Everything is in one clear dashboard via Catcher24.
“Phishing has become a major topic of conversation at the lunch table.”
Rob
Director/Co-owner
The automated web scanner checks to ensure our registration website is secure, and ESET endpoint protection keeps our workstations safe. Everything is in one clear dashboard via Catcher24.
Rob
Director/Co-owner
The automated web scanner monitors our infrastructure and immediately reports any security issues. ESET endpoint server protection keeps our servers shielded from malware and ensures our updates and patches are current.
“Real-time insight into the vulnerabilities of our servers and applications is essential!”
René
Application Development Manager
The automated web scanner monitors our infrastructure and immediately reports any security issues. ESET endpoint server protection keeps our servers shielded from malware and ensures our updates and patches are current.
René
Application Development Manager
The automated application scanner checks our CRM package for vulnerabilities.
“Working from home with the same security against cyber threats as in the office.”
Richard
Founder & CEO
The automated application scanner checks our CRM package for vulnerabilities.
Richard
Founder & CEO
Our intergrations
Embed vulnerability management directly into your active incident response workflows. We push the alerts to where your engineers already work.
Native Slack Alerting
Push prioritized threat alerts directly to specific developer channels. Get notified instantly when a critical CVE is detected on your infrastructure, web apps, or WordPress sites.
Microsoft Teams Webhooks
Automatically notify your IT operations center. Route detailed vulnerability context and severity scores straight into your dedicated Teams workspaces to initiate immediate triage.
Frequently asked questions
The infrastructure scanner is an automated service that continuously monitors your (external) infrastructure for vulnerabilities. Think of your public servers, IP addresses, ports, SSL/TLS certificates, DNS settings, configuration errors, and other things that are accessible from the internet.
We recommend scheduling scans regularly, at least once a month, with real-time notifications for any new vulnerabilities that arise.
Yes. The scanner monitors the validity and correct configuration of SSL/TLS certificates and warns you well in advance before a certificate expires.
The infrastructure scanner checks, among other things, that SPF, DKIM, DMARC are set up correctly, and other DNS records (such as CAA, nameserver settings, etc.) to prevent email spoofing or misconfiguration.
Yes. After implementing corrections or after releases, you can start a scan yourself, or even better, schedule a scan automatically to verify that the problems found have actually been resolved.
No. Catcher24 is a 100% cloud-native, outside-in scanner. We assess your infrastructure by sending public requests and analyzing the responses, completely eliminating the need for server agents, kernel modules, or local software installations.
Our basic port mapping and SSL checks are entirely passive and safe. However, the deep vulnerability detection engine performs thousands of active service checks. While it does not inject database payloads like our web app scanner, the sheer volume of network requests can trigger IDS/IPS alerts or generate heavy log traffic. We recommend scheduling full infrastructure scans during low-traffic maintenance windows.
Blogs
Read the latest insights, trends, and practical tips to make your company resilient against cyber threats.
Catcher24
•Jul 08, 2026
Secure your WordPress site instantly: Introducing the Catcher24 WordPress plugin
Catcher24
•Apr 13, 2026
Never miss a critical threat: Real-time vulnerability notifications via Slack
Improve your cybersecurity today
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