Linux powers mission-critical production containers, cloud clusters, and high-performance databases. Riptide Cybersecurity’s CIS Linux Auditing ensures your Linux environments are hardened against local privilege escalation, container breakouts, and unauthorized access.
Supported Linux Distributions
We conduct automated and manual audits across:
- Red Hat Enterprise Linux (RHEL 9, 8) & Rocky Linux / AlmaLinux
- Ubuntu LTS (24.04, 22.04, 20.04)
- Debian GNU/Linux (12, 11)
- Amazon Linux 2 & 2023
Core Hardening Areas Audited
- Filesystem & Partition Hardening: Verification of
nodev,nosuid, andnoexecmount options on/tmp,/var,/var/tmp, and/home. - Kernel Security Optimization (
sysctl.conf): Hardening TCP/IP stack against SYN flood attacks, disabling ICMP redirects/source routing, and ASLR validation. - Access Control & PAM: Pluggable Authentication Modules (PAM) configuration, password complexity, account lockout thresholds, and restrictive sudoers configuration.
- Mandatory Access Control (MAC): SELinux enforcement (Targeted Policy) and AppArmor baseline configuration.
- System Logging & Audit Subsystem (
auditd): Kernel-level audit rules for tracking file modifications, privilege escalation attempts, time manipulation, and failed logins. - SSH Bastion Security: Enforcing modern cryptographic ciphers (ChaCha20-Poly1305, Ed25519), key-based authentication, and idle session disconnects.
Deliverables & Remediation Roadmap
- CIS Deviation Matrix & Scorecard: Itemized audit report with clear pass/fail ratings and exact verification steps for your technical team.
- Tailored Hardening Guidance: Actionable configuration blueprints and remediation strategies tailored to your distribution and application environment.
