Linux Server Audit

Complete Linux server security audit covering OS, SSH, firewall, services, web stack, mail, logs, backup and hardening.

What We Audit on a Linux Server

A YourServerAudit Linux Server Audit is a structured, manual review of your server’s security posture. We examine the full stack, from the OS layer up through your running services, to identify misconfigurations, unnecessary exposure and common attack vectors.

Our audit covers:

Operating system and kernel — distribution, version, patch level, end-of-life status, kernel parameters
SSH configuration — authentication methods, root access, port exposure, allowed users, key management
User accounts and sudo — active accounts, password policies, sudo privileges, service accounts, orphaned users
Firewall and network — iptables/nftables/firewalld rules, default policies, allowed traffic, IPv6 exposure
Open ports and listening services — full port scan, service identification, unnecessary listeners
Web server — Apache, Nginx or LiteSpeed configuration, virtual hosts, SSL/TLS, HTTP headers
PHP configuration — exposed functions, error display, execution limits, session handling
Database — MySQL/MariaDB/PostgreSQL access controls, remote exposure, authentication, backup status
Mail server — MTA configuration, open relay, SPF/DKIM/DMARC, mail queue, blacklist status
Cron jobs — scheduled tasks, suspicious entries, permissions
Logs — log rotation, retention, signs of brute force, unauthorized access, anomalies
Malware indicators — suspicious processes, web shells, cryptominers, rootkit checks
Backup — backup existence, schedule, offsite status, restoration readiness

Why You Need a Server Audit

Most compromised servers were not breached through sophisticated exploits. They were running outdated software, had weak SSH configurations, exposed unnecessary services or used default credentials. A structured audit catches these issues before an attacker does.

If you manage production Linux servers, a periodic audit is essential. It is equally important after inheriting servers, onboarding new infrastructure or responding to a security incident.

What You Receive

A detailed PDF report covering every area listed above
Risk-rated findings with severity levels (critical, high, medium, low, informational)
Specific remediation steps for each finding
An executive summary suitable for management or compliance purposes
A follow-up consultation to discuss findings and prioritize fixes

Focused Sub-Services

If you need a deeper review of a specific area, we offer focused audits:

Server Hardening Review — SSH, firewall, user management, service minimization, access controls
Exposed Services Audit — open ports, unnecessary listeners, attack surface analysis
Mail Server Security Audit — MTA configuration, SPF/DKIM/DMARC, reputation, abuse indicators
Web Server Security Audit — Apache/Nginx/LiteSpeed configuration, SSL/TLS, PHP, permissions

For broader infrastructure reviews covering cloud, DNS, CDN, monitoring and multi-server environments, see YourInfraAudit.com.

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