Protected networks

Firewall & network security

Firewalls, VPN, segmentation and ongoing maintenance for networks that remain controllable and secure.

Discuss network security

HDN · Planung, Installation & Support

A firewall is not a box – it is part of an operating concept.

HDN combines perimeter protection, internal network segmentation, secure remote access and documented rules. This keeps protection effective when systems, sites and teams change.

  • Planning and configuration matched to actual risks
  • Separation of office, guest, production, IoT and camera networks
  • Updates, monitoring and support with clear responsibilities
01

Firewall & secure access

Internet connections and remote access are protected according to business requirements.

  • Firewall sizing and rule sets
  • Site-to-site and remote-access VPN
  • Controlled publishing of services
02

Segmentation & hardening

Internal separation limits failures and prevents unnecessary access.

  • VLAN and zone concepts
  • Guest, IoT, camera and server networks
  • MFA, administrative access and secure defaults
03

Operations & visibility

Security stays effective through maintenance, monitoring and traceable changes.

  • Firmware and security updates
  • Logs, alerts and regular reviews
  • Documentation, backup and recovery of configurations
Stefan Keller from HDN during a personal consultation

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