thierolf.org - Vom Hirn ins Terminal seit 1998.

Blog Posts

NetFlow with Elastic-Stack

Written by Stefan on . Modified on . 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 . Modified on . 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 . Modified on . 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 . Modified on . 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 . Modified on . 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 . Modified on . 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 . Modified on . 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 . Modified on . Posted in Blog. Tags: #internet  #security 

Mapping of IP addresses blocked by Russia


Werbeemails aufgrund LinkedIn Profils

Written by Stefan on . Modified on . 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 . Modified on . Posted in Blog. Tags: #internet  #network  #tor 

Tor project / Tor bridge.


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