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Network Infrastructure

Network Infrastructure

Planning, building, and operating networks – from segmentation to securing the perimeter. The focus is on traceable, documented configurations rather than infrastructure that grew ad hoc over time.

Switching with MikroTik

  • Planning and configuration of RouterOS switches and routers
  • VLAN segmentation (e.g. separating workstations, servers, guests, and IoT devices)
  • Layer 3 switching and inter-VLAN routing
  • Link aggregation (LACP) and redundant uplinks
  • Central configuration backups and documentation of the network topology

Firewall & Routing with OPNsense

  • Deployment of OPNsense as firewall, router, and VPN gateway
  • Rule sets built on least privilege, per network segment
  • Site-to-site and client VPN with WireGuard, OpenVPN, or IPsec
  • Intrusion detection / prevention (Suricata)
  • Firewall cluster high availability (CARP) for uninterrupted operation
  • Traffic shaping and monitoring of network throughput

Approach

Inventory of the existing infrastructure, requirements gathering, network topology design, and a step-by-step, documented rollout – so the configuration stays traceable without relying on a verbal handover.

Contact: web@fischer-it.solutions · +43 677 614 32 882