Ubuntu Security & Hardening

Linux Security & Hardening Services

Ubuntu ships with reasonable security defaults, but production systems need deliberate hardening. Linux servers are high-value targets — exposed services, misconfigured permissions, and unpatched vulnerabilities are the most common entry points. Tomotechi implements defense-in-depth security for Ubuntu environments, covering the OS layer, network perimeter, user access, and compliance requirements common in regulated industries.

Security Services

• System hardening: Minimal package installation, disabled unused services, secure SSH configuration, and kernel parameter tuning
• Firewall (UFW/nftables): Restrictive default-deny rulesets with only necessary ports open
• AppArmor: Mandatory access control profiles to confine application behavior
• Encryption: Full-disk encryption (LUKS), encrypted backups, and TLS certificate management
• Patch management: Automated security updates with unattended-upgrades and controlled rollout for major patches
• Audit logging: auditd configuration, centralized log shipping, and anomaly alerting
• Vulnerability scanning: Regular OpenVAS or Lynis audits with remediation tracking
• Compliance: CIS Benchmark implementation, HIPAA, PCI-DSS, and SOC 2 control mapping

Incident Response & Ongoing Monitoring

Security is not a one-time configuration. We provide ongoing monitoring with intrusion detection (AIDE, Fail2Ban), alert triage, and incident response support — so threats are caught early and handled before they become breaches.