Blog Posts

Testing for Cisco security vulnerabilities with Ansible

In this blog post I'm demonstrating how to test for Cisco security vulnerabilities with Ansible.

Mastodon accounts

Bookmarks and links to various Cybersecurity, Infosec, dataprotection and privacy accounts on Mastodon

Add Virtual Machine to NetBox with an Ansible playbook

In this blog post I'm showing how to get a Virtual Machine, defined in an Ansible inventory file, into the NetBox DCIM (Data Center Information Management) tool.

NetFlow with Elastic-Stack

This blog post shows how to setup a NetFlow collector with Elastic-Stack, Fleet and Elastic-Agent. NetFlow data is sent by a Cisco ASA Firewall cluster.

Technischer Schutz und Prozesse bei Datenlecks

In diesem Blog-Post beschreibe ich meine technischen Schutzmaßnahmen (Email) und Prozesse, wenn ich von einem Datenleck betroffen bin.

Cisco Wireless Intrusion Detection Events to Elastic-Stack

In this blog post I'm showing how to get Wireless Intrusion Detection Events from Cisco's WIDS included in Cisco's Wireless Controllers into an Elastic-Stack.

802.1X Switch port is amber when only IP Phone is connected

When 802.1X (wired) is configured on a 3750G switch, the port LED is amber when only an IP Phone is connected (mab). When connecting on the IP Phone a downstream device like a laptop (dot1x), the port LED goes to green.

Login-Block (DoS and Dict-Attack Protection) in Cisco IOS

Cisco offers a method to protect against DoS (Denial-of-Service) and Dictionary attacks for IOS devices called Login-Block.

Update Schneider-APCUPS firmware with Linux

In this blog post I'm showing how to update a Schneider-APC UPS with Linux.

Mapping of IP addresses blocked by Russia

Mapping of IP addresses blocked by Russia