Blog Posts

NetFlow with Elastic-Stack

Written by Stefan on Tue 02 August 2022. Modified on Tue 02 August 2022. Posted in Blog. Tags: #cisco  #network  #security  #netflow  #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

Written by Stefan on Sun 24 July 2022. Modified on Wed 03 August 2022. Posted in Blog. Tags: #security 

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

odenwald.social

Written by Stefan on Sun 03 July 2022. Modified on Thu 28 July 2022. Posted in Blog. Tags: #mastodon  #odenwald 

Just a quick announcement: Die Mastodon-Instanz odenwald.social ist freigeschaltet. Viel Spass ;)

Cisco Wireless Intrusion Detection Events to Elastic-Stack

Written by Stefan on Tue 07 June 2022. Modified on Thu 28 July 2022. Posted in Blog. Tags: #cisco  #network  #security  #wifi  #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

Written by Stefan on Sat 21 May 2022. Modified on Thu 28 July 2022. Posted in Blog. Tags: #cisco  #network  #security 

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

Written by Stefan on Thu 21 April 2022. Modified on Thu 28 July 2022. Posted in Blog. Tags: #cisco  #network  #security 

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

Written by Stefan on Mon 14 March 2022. Modified on Thu 28 July 2022. Posted in Blog. Tags: #battery  #apc  #ups 

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

Mapping of IP addresses blocked by Russia

Written by Stefan on Sun 06 March 2022. Modified on Thu 28 July 2022. Posted in Blog. Tags: #internet  #security 

Mapping of IP addresses blocked by Russia

Werbeemails aufgrund LinkedIn Profils

Written by Stefan on Sat 05 March 2022. Modified on Thu 28 July 2022. Posted in Blog. Tags: #internet  #spam  #linkedin 

Werbeemails aufgrund LinkedIn Profils / SPAM mails due to LinkedIn Profile.

Tor project / Tor bridge

Written by Stefan on Wed 02 March 2022. Modified on Thu 28 July 2022. Posted in Blog. Tags: #internet  #network  #tor 

Tor project / Tor bridge.

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