Auch dieses Jahr habe ich wieder viele Fotos beim 202. Hövelmarkt gemacht.
Die Bildergalarien sind unter http://www.hoevelmarkt.de verfügbar.
Also this year I have taken many photos during the 202. Hövelmarkt (30th September to 3rd October 2016). The collections are available under http://www.hoevelmarkt.de.
PGModeler (http://www.pgmodeler.com.br) is a nice tool to design your (PostgreSQL) database. It supports import from and export to a databases. Ubuntu 15.10 comes with a quite recent version but e.g. Debian does not provide it in the repository. In this post I explain howto build the application on Linux (tested on Debian 8) from source.
A VirtualBox image needs to be shrinked again from time to time. Due to usage, updates, testing the size of the VDI files grows. The following post shows how to shrinken the VDI files again.
Continue reading “VirtualBox: Shrink dynamically extended image”
If you use an operating system which default file encoding is not UTF-8 (e.g. Windows) it is sometimes beneficial to change the file encoding NetBeans IDE will use.
The next post of the fail2ban series will handle the protection of postfix mail servers.
Continue reading “Protecting servers with fail2ban – Postfix mail server”
I took some (actually a lot) photos on Hövelmarkt 2015. A collection has been published on http://www.hoevelmarkt.de/Bildergalerie/.
Ich habe einige (genau genommen viele) Bilder für den Hövelmarkt 2015 gemacht. Eine Auswahl ist unter http://www.hoevelmarkt.de/Bildergalerie/ zu sehen.
In the next part of the series, the protection of webservers is explained. In this example I use Apache HTTPd webserver. Similar configurations are also available for e.g. nginx. There are various reasons for protecting the webserver itself (webapplications installed will be described in on of the next posts). Attackers are e.g. scanning the server for vulnariblties or try to attack the server using invalid input.
Continue reading “Protecting servers with fail2ban – Apache HTTPd webserver”
As the next part of the series, the protection of the most common service SSH is described in this post. Almost every Linux based server will run a version of ssh daemon to be able to login from remote. In this post I will describe how to protect ssh using fail2ban.
Continue reading “Protecting servers with fail2ban – protect ssh”
After setting up fail2ban its time to check which ports are open. Potentially each open port should be protected using fail2ban.
Continue reading “Protecting servers with fail2ban – analyze services to protect”
Fail2ban helps a lot to get rid of unwanted traffic to your server which cleans your log files a lot. In this post I will describe how to setup fail2ban on your server.
Continue reading “Protecting servers with fail2ban – basic installation”
