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Security

IT Security Consulting

Linux is very secure – but only when it is configured correctly. We harden your systems to recognised standards, close off attack surfaces and ensure that your IT remains operational even in an emergency.

IT security and network protection

System hardening based on BSI recommendations

We harden your Linux systems based on the BSI baseline protection recommendations and established security benchmarks (CIS). Every unnecessary attack surface is closed before it becomes a problem.

  • Kernel hardening: Securing the operating system kernel, secure boot settings, AppArmor/SELinux profiles.
  • Service minimisation: Deactivating all unnecessary services and network ports – what isn't running can't be compromised.
  • Patch management: Automated security updates and structured patch processes for all systems.
  • Audit logging: Gapless logging of all security-relevant events for compliance and forensics.

Network security & firewall

A well-thought-out firewall concept is the first line of defence. We design and implement network security architectures that match your requirements – from a simple firewall to a multi-tier DMZ.

Firewall concept

Planning and implementation with pfSense/OPNsense – rule-based, documented, auditable.

VPN solutions

WireGuard or OpenVPN for secure remote access – fast, modern, low-maintenance.

Network segmentation

VLAN separation of production, office and guest networks – limiting damage through isolation.

Backup & disaster recovery

No security concept is complete without a working backup strategy. We plan, implement and test your backup and recovery processes – so that you can act quickly in an emergency.

  • 3-2-1 backup strategy: 3 copies, 2 different media, 1 offsite backup – proven redundancy against data loss.
  • Ransomware protection: Immutable backups that cannot be encrypted even during an attack.
  • Restore tests: Regular, documented recovery tests – because a backup is only as good as its last restore.

Make your IT secure and resilient

Let's analyse your security posture together – free and with no obligation.