You can't secure what you don't measure. This step-by-step IT security audit guide will help you identify your most critical vulnerabilities and prioritize fixes before attackers find them.
A security audit is a systematic review of your IT environment to identify vulnerabilities before attackers do. For small businesses, a quarterly internal audit combined with an annual third-party penetration test represents best practice.
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Why Security Audits Matter for SMBs
The average time between an attacker gaining initial access and being discovered is 197 days. Most breaches are discovered by external parties rather than by internal detection. A regular security audit shortens this detection window significantly.
Internal vs External Security Audit
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Explore Managed Security (MSSP)An internal audit is conducted by your IT team or MSP and focuses on policy compliance, access control review, backup verification, and vulnerability scanning. Should be done quarterly. An external penetration test is conducted by a third-party security firm that attempts to breach your systems as an attacker would. Should be done annually.
Security Audit Tools for SMBs
Microsoft Secure Score provides a free baseline for Microsoft 365 environments. Microsoft Defender Vulnerability Management is included with Defender for Business. Nessus Essentials is a free vulnerability scanner for up to 16 IPs. CIS-CAT Lite benchmarks against CIS Controls at no cost.
