What the server hardening checklist covers
The checklist is vendor-neutral: the control questions apply to any server, and a dedicated OEM Command Reference sheet gives you the exact command or console path to collect the evidence on each platform. The sixteen control domains are:
- Scope & governance, asset inventory and ownership
- Identity & authentication — default accounts, MFA, password policy, service accounts
- Privilege & access control — least privilege, elevation, remote admin exposure
- Patch & vulnerability management — SLAs, EOL status, authenticated scanning
- Services & attack-surface reduction — minimal footprint, legacy protocols (SMBv1, Telnet, LLMNR)
- OS hardening & secure configuration — baseline, exploit mitigations, disk encryption
- Network & host-based firewall, cryptography & secure protocols (TLS, SSH)
- Logging, audit & monitoring, file integrity, malware protection, time sync
- Backup & recovery (ransomware-resilient), boot / firmware / BMC and virtualisation hosts
Which servers and operating systems it applies to
One checklist, every platform. The OEM Command Reference sheet spells out how to pull each item of evidence on:
- Windows Server 2016, 2019 and 2022
- Red Hat Enterprise Linux, Rocky, Alma and Oracle Linux
- Ubuntu and Debian
- SUSE Linux Enterprise Server
- VMware ESXi hypervisor hosts
- Unix — AIX and Solaris
How auditors use it
Work top to bottom, set each control to Pass, Fail, Partial, Not Applicable or Not Tested, and attach an evidence reference. The Excel workbook includes a live dashboard (pass rate, open findings by priority), a findings register, an evidence-request list and a weighted risk-scoring model — so a server configuration review becomes a repeatable, evidence-based exercise rather than a documentation walk-through.
Framework mapping built in
Every control carries practical mappings to CIS Benchmarks and CIS Controls v8.1, NIST CSF 2.0, ISO/IEC 27001:2022, PCI DSS v4.0.1 and the UAE IA / KSA ECC regional controls — so one review evidences several obligations at once. The mappings are practical audit mappings, not a substitute for the licensed text of each standard.
Frequently asked questions
What is a server hardening checklist?
A server hardening checklist is a structured list of security controls used to reduce a server’s attack surface and configure it securely — covering identity and access, patching, unnecessary services, cryptography, logging, backup and firmware. This one contains 51 controls, each with a test method, the evidence to collect and the risk if it is missing.
Does it cover both Windows and Linux servers?
Yes. The control questions are vendor-neutral and a dedicated OEM Command Reference sheet gives the exact command or console path for Windows Server, RHEL/Rocky/Alma/Oracle Linux, Ubuntu/Debian, SUSE, VMware ESXi and Unix (AIX/Solaris).
Is it aligned to CIS Benchmarks and PCI DSS?
Every control is mapped to CIS Benchmarks and CIS Controls v8.1, NIST CSF 2.0, ISO/IEC 27001:2022 and PCI DSS v4.0.1, plus UAE IA and KSA ECC — so a single hardening review supports several compliance obligations.
What format is the download?
You get a 12-sheet Excel working checklist (with a live dashboard, findings register and OEM command reference) and a matching PDF narrative workbook. Both are free.
Can CyberSigma run the server hardening review for us?
Yes — our CERT-In empanelled auditors perform independent server configuration reviews and hardening assessments against this checklist, with a prioritised findings report and remediation support.
This checklist is provided for educational use and is not a substitute for the licensed text of the referenced standards or a formal audit opinion. © Cyber Sigma Consulting Services LLP.