About

Written by Stefan on . Modified on .

Hi, I’m Stefan Thierolf and this is my web site. I’m an IT specialist system integration (Fachinformatiker Systemintegration) and work as Sr. Professional Consultant IT Network and Communication for a global automotive supplier. I lived in the United States (New Hampshire) for about five years and moved back to good old Germany end-of-2018.

I like to blog about Information Technology, Network, Linux and Security, therefore most of my blog posts are of “technical” nature.

I’m building networks for more than 20 years. With networks I mean computer networks. In most cases I’m dealing with Cisco hardware like switches, wireless controller and access points as well firewalls. And I’m doing other things like looking for innovations and IT security. I’m also writing technical documents and guides. Sometimes I develop source code and smaller software projects - So I might be a something like a devop - But I prefer to call it “automate things”…

I’m running the domain thierolf.org and love the free internet. Therefore I am not on the typical US social networks like facebook or instagram.

German laws demand to have an Impressum (imprint) on a web site. I have a DSGVO (german) and a GDPR (english) on my web site.

Knows about:

  • Cisco Switches, Access Points, Wireless LAN Controller, ASA Firewall, IP Phones

  • Debian Linux, Kali Linux, Sun Solaris, Windows, XCP-NG

  • Python, Java, PHP, Perl, Shell

  • Solarwinds, IPAM, Netflow, Netbox, LibreNMS, GitLab, Wireshark, Systimax iPatch

  • DHCP, DNS, RADIUS, SNMP, Syslog, Apache web server, MariaDB/MySQL

  • Data Center Design, Network Design, Cabling

Experience:

2011 - Present

  • Concept and implementation of Netbox as global DCIM tool

  • Network projects in Germany, USA, Mexico, China, Thailand, India, Brazil

  • Surveys, Planning and Build-up of IT Infrastructure (manufacturing plants/offices)

  • Implementation of Solarwinds IPAM and Netflow Analyzer

  • Design and concept of global Wireless Network for client devices

  • Implementation of RADIUS authentication for Cisco hardware

  • Concept for global Cisco configuration backups

Certifications:

Cisco DevNet Profile & Achievements:

Contact

Email: stefan [AT] thierolf [DOT] org

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Email: hello [AT] thierolf [DOT] org

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