Your Servers Are
Your Last Line of
Defence.
A misconfigured server is an open door. Gleyon's server hardening service locks down every attack surface — SSH configuration, kernel parameters, firewall rules, privilege escalation paths — against CIS Level 2 benchmarks.
End-to-End Server Protection
OS Hardening
CIS Level 2 baseline hardening for Ubuntu, CentOS, Debian, RHEL, and Windows Server. Kernel parameter tuning, unused service removal, and file permission auditing.
SSH & Access Management
Disable password authentication, enforce key-based SSH, implement jump-host architecture, restrict root login, and deploy Certificate Authority-based SSH with automatic key rotation.
Firewall & Network Segmentation
iptables, nftables, and ufw configuration with default-deny policies. VPC security groups, NACLs, and zero-trust micro-segmentation for lateral movement prevention.
Patch Management
Automated patch assessment (Tenable, Qualys), risk-prioritised patching schedule, change-window management, and rollback procedures — maintaining 99% patch compliance.
HIDS / File Integrity Monitoring
OSSEC / Wazuh deployment for real-time file integrity monitoring, rootkit detection, log analysis, and active response to suspicious system calls and privilege escalations.
Compliance Auditing
Automated CIS, DISA STIG, and PCI-DSS server configuration audits with full remediation guidance and evidence packs ready for external auditors.
From Exposed to Hardened
Baseline Audit
Automated CIS benchmark scan of all servers — scoring every control, identifying critical gaps, and producing a prioritised remediation backlog.
Hardening & Configuration
Apply CIS Level 2 hardening via Ansible playbooks — tested in staging first, applied to production during approved change windows with instant rollback capability.
Continuous Monitoring
HIDS deployment, continuous compliance drift detection, automated patch assessment, and monthly hardening score reports delivered to your team.
Hardened Once. Monitored Always.
We use Ansible for every hardening change — meaning it's version-controlled, repeatable, and self-documenting. No more manual changes that drift over time.
- All hardening via Ansible — fully documented and repeatable
- CIS Level 2 benchmark — not just Level 1 basic controls
- Tested in staging before every production change
- HIDS + FIM active on all managed servers from day 1
- Monthly compliance score with before/after comparison
- Covers bare-metal, KVM, VMware, and cloud VMs equally