thierolf.org
Vom Hirn ins Terminal seit 1998

Hi, I'm Stefan Thierolf and this is my web site. I'm an IT specialist system integration (Fachinformatiker Systemintegration) and work as Global IT Analyst - Network 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.

You can find a bit more information in my about page.
Some photo albums are also online.
In case I forget some web sites I bookmark them ;)

Latest blog posts

Upgrading XCP-NG Hypervisor from version 7.6 to version 8.1
Upgrading XCP-NG Hypervisor from version 7.6 to 8.1 remotely over VPN connection and KVM. Fixing IPTables and SNMP configuration for monitoring system.
2020-06-14 / Veröffentlicht in blog / [stefan]

Netbox: New installation (2.8.5) and NAPALM plus LibreNMS API integration
This is the third part of a series of blog posts covering my new netbox installation. This part shows how to integrate NAPALM and Graphs on device Interfaces from the Monitoring system LibreNMS.
2020-06-11 / Veröffentlicht in blog / [stefan]

Netbox: New installation (2.8.5) and cabling and assigning IP addresses
This is the second part of a series of blog posts covering my new netbox installation. The rack is filled up with the rest of the hardware and each network port is getting cabled. This part contains also IPAM (IP Address Management) and handling of Provider and Circuits.
2020-06-07 / Veröffentlicht in blog / [stefan]

Netbox: New installation (2.8.5) and filling up an empty rack
This is the first part of a series of blog posts covering my new netbox installation. It covers the defining of manufacturers, device types, power panels and power feeds. An UPS, Power Strips and two Cisco switches are added including their Power cabling. As bonus, the Cisco switches are build as Virtual Chassis (Cisco Switch-stack).
2020-06-01 / Veröffentlicht in blog / [stefan]

Why 2.4 GHz WiFi is bad
Cisco CleanAir quality report for 2.4GHz WiFi in my area
2020-05-28 / Veröffentlicht in blog / [stefan]

Useful Cisco Commands for Troubleshooting cable problems
Useful Cisco Commands for Troubleshooting problematic cabling (Cat.x and Fiber optics).
2020-02-21 / Veröffentlicht in blog / [stefan]

Simple High Availability with CARP
Simple High Availability with CARP (Common Address Redundancy Protocol)
2020-02-05 / Veröffentlicht in blog / [stefan]

Cisco Live 2020 Barcelona, Day 5
Cisco Live 2020 Barcelona, Day #5 - SD-WAN, deployment strategies, managing and monitoring
2020-01-31 / Veröffentlicht in blog / [stefan]

Cisco Live 2020 Barcelona, Day 4
Cisco Live 2020 Barcelona, Day #4 - Catalyst 9000 Access Switching Architecture and Resolving Network Faults Faster through Automating Entire Fault Management
2020-01-30 / Veröffentlicht in blog / [stefan]

Cisco Live 2020 Barcelona, Day 3
Cisco Live 2020 Barcelona, Day #3 - About Garlic and Onions and Industrial Automation
2020-01-29 / Veröffentlicht in blog / [stefan]

Cisco Live 2020 Barcelona, Day 2
Cisco Live 2020 Barcelona, Day #2 - Attack Kill Chain and Packet Capturing
2020-01-28 / Veröffentlicht in blog / [stefan]

Cisco Live 2020 Barcelona, Day 1
Cisco Live 2020 Barcelona, Day #1 - A cat and mouse Game
2020-01-27 / Veröffentlicht in blog / [stefan]