27.10.2026 aktualisiert
100 % verfügbar
IT-Security, Switching Routing Firewall, Admin Linux Unix.
Schleiden, Deutschland
Nur Remote
Self toughtÜber mich
Computer nerd since 1986, IT profession since 1996. Build, test, break, repeat.
Skills
ProxmoxUNIXLinuxIpv4Internet-SicherheitIp-AdressverwaltungKali LinuxNetwork SecurityLinux-BefehleLinux-gestützte GeräteLinux ServersRoutingShell-ScriptVirtualizationFirewalls
Linux/Unix: System administration, troubleshooting, services and network configuration
Networking: TCP/IP, IPv4, switching, routing, VLANs, VPNs and network diagnostics
Firewalls & Security: OPNsense, pfSense, firewall rules, network segmentation and security hardening
Virtualization: Proxmox VE, virtual machines and infrastructure operations
Containers: Docker and container-based services
Automation: Shellscript
Network Analysis: Nmap, Wireshark
Storage & Backup: NAS/SAN concepts, storage infrastructure and backup solutions
Erfahrung
Berufserfahrungmehr als 10 Jahre
Freelancer seit1996
Sprachen
DeutschMutterspracheEnglischverhandlungssicher
Projekthistorie
Long-term independent IT consulting and technical services for various clients, covering system administration, network infrastructure and IT operations.
Hands-on experience with Linux/Unix systems, TCP/IP networking, routing, switching, firewall configuration, virtualization and infrastructure troubleshooting. Additional focus on Proxmox VE, Docker, network diagnostics and infrastructure automation using Ansible and Terraform.
Experienced in analyzing complex technical issues, identifying root causes and implementing practical solutions across heterogeneous IT environments.
Core Technologies
Linux / Unix
TCP/IP, IPv4, routing and switching
Firewalls: OPNsense, pfSense
Virtualization: Proxmox VE
Containers: Docker
Automation: Shellscript
Network diagnostics: Nmap, Wireshark, Bettercap, IPerf
Storage and backup infrastructure