DevOps & Cloud

Default Linux server configurations are not secure — attackers know the defaults better than you do

We harden your Linux servers against attack using CIS Benchmarks, implement intrusion detection, configure automated patching, and set up monitoring — so your servers stay secure without constant manual effort.

Get Free Server Security Assessment

The challenges you're facing

Linux servers deployed with default configurations, root SSH enabled, and no firewall rules — a scanner finds them in minutes

No automated patching — servers accumulating CVEs month after month with nobody tracking or applying updates

No intrusion detection — compromised servers running cryptominers or acting as attack pivots with no alert raised

CIS Benchmark Linux Hardening with Ongoing Security Monitoring

We harden Linux servers (Ubuntu, Debian, CentOS/RHEL, Amazon Linux) against the CIS Benchmark: filesystem configuration, user and group management, SSH hardening, access control (PAM, sudo), network configuration, logging and auditing, software restriction, and service configuration. We implement fail2ban for brute force protection, auditd for system call auditing, AIDE or Wazuh for file integrity monitoring, and unattended-upgrades for automated security patching.

What you get

Baseline Security Assessment

Run CIS Benchmark assessment against current server configuration and quantify the gap.

Hardening Implementation

Apply CIS Benchmark controls: SSH hardening, PAM configuration, filesystem settings, and service lockdown.

Intrusion Detection & Monitoring

Deploy Wazuh or OSSEC for file integrity monitoring, system auditing, and security event detection.

Automated Patching & Compliance Scanning

Configure unattended security upgrades and scheduled CIS Benchmark compliance scanning.

Technologies & tools

Ubuntu/DebianRHEL/CentOSWazuhFail2banauditdAIDEOpenSCAPAnsible

Case study — anonymised

E-Commerce — 8 Linux production servers

Before

8 Ubuntu servers deployed with default AMI configuration. Root login enabled on all. SSH on port 22 with password auth. No firewall (all ports open). No logging to SIEM. Last security update: 3 months ago.

After

CIS Level 2 hardening applied via Ansible. Root login disabled, SSH key-only auth on non-standard port. UFW firewall configured. Wazuh agents deployed. Unattended-upgrades configured.

SSH brute force attempts reduced from 4,000/day to 0 (non-standard port + key auth), CIS benchmark score from 23% to 89%, 0 unpatched critical CVEs (was 12)

Frequently Asked Questions

Common questions from enterprise and mid-market teams across India and internationally.

What is the CIS Benchmark for Linux?

CIS (Center for Internet Security) Benchmarks are industry-standard security configuration guides produced by a global consensus of security experts. CIS Level 1 covers foundational hardening that all servers should have. CIS Level 2 covers additional hardening for high-risk environments. We use OpenSCAP to measure your compliance before and after hardening.

Will hardening break our applications?

Hardening can break applications if applied blindly. We assess application dependencies before hardening and skip controls that conflict with your application requirements (e.g., if your app requires a specific open port, we don't block it). Everything is tested in staging before production. We document every exception with the business justification.

Can hardening be applied via Ansible for multiple servers?

Yes. We implement hardening as Ansible playbooks, which means the same hardening can be applied consistently to all your servers simultaneously and re-applied automatically to new servers provisioned from your AMI or cloud image. This is the recommended approach for fleets of servers.

What is file integrity monitoring and why do I need it?

File integrity monitoring (FIM) detects when files are modified on your server — including system binaries, configuration files, and web application files. An attacker who gains access will modify files (install backdoors, modify web app code). FIM tools like AIDE and Wazuh detect these changes within minutes and alert your security team, regardless of how the attacker gained access.

Ready to get started?

Tell us about your situation and we'll respond with a tailored assessment within one business day.