Having all the data in just one server is not the best idea. Especially when talking about a database server. Spreading information in several boxes is a good measure to prevent data loss but also for performance. A MySQL/MariaDB master-slave replication scheme is often used as a good solution for both, data redundancy and speed. […]
How to setup MariaDB master-slave replication on FreeBSD
A few useful network commands
Troubleshooting network issues with simple commands is not a very difficult topic once there is a little toolbox to pull from. Needless to say networking topics can be very complicated and any specialist on the field will tell you how cumbersome it can really get. However with a few set of commands one can get […]
How to harden Apache HTTP
Disclaimer: This is a long article. I haven’t collected some nice configuration settings here for the sake of it. There are other hardening guides but some fall short on explaining the functionalities to be enabled or disabled. Every step is shortly, and hopefully clearly, explained so any reader can grasp the main idea of every […]
A brief introduction to SSL/TLS certificates
SSL stands for Secure Sockets Layer and it an old implementation of a crytographic protocol. TLS, or Transport Layer Security, is a new one. They are both used to have privacy in the communications between different parties. They are used to secure email, web browsing, instant messaging, etc These protocols work in a complex way […]
How to load and unload kernel modules in Linux
Kernel modules permit enabling hardware features on a given system. For example, if we need to read from a particular filesystem from a hard drive, we need to load a particular kernel module. Or use a specific network card, a sound card or sound device, a video display, etc. This is mostly done automatically in […]
Contact
I am a busy guy. Answering comments takes precious time from my daily life so don’t get mad if I don’t reply you back quickly or if I just don’t do. Plus, think twice before posting. If you really have something interesting to say, just go ahead. If that is something you really think I’d […]
ARP spoofing attacks
ARP spoofing attacks are quite harming and they can easily constitute a man-in-the-middle (MITM) attack. They consist on the attacker sending ARP packets into the network the victim is located, typically redirecting traffic to the attacker’s machine. Once this is achieved the attacker can sniff all the traffic sent by the victim’s device and obtain […]
How to improve Apache HTTP performance on FreeBSD
There are some nice articles on the internet telling you how to improve your Apache HTTP server’s performance. I did my bit on FreeBSD land. While turning on a different MPM than the prefork default one increases Apache HTTP performance by a lot, it is not the only thing one may do. For example if […]
How to set the locale in FreeBSD
The locale is the character set that will be used. And it is very important to match the keyboard you are using. Mind this also matters if you are transferring data to other systems. Different standards as the ASCII, UTF’s and the ISO’s, to name a few, have been put in place through the years […]
How to install RKHunter on FreeBSD
In this post you will find simple instructions to install rkhunter on FreeBSD which is a root kit “hunter” so your system/s will have some security in place for that kind of unwanted software. But for those who do not know what a rootkit is, let’s give it a simple definition (which you can get […]