combined IT ramblings
Steps to take to protect an internet-facing Raspberry PI (or other Debian) from brute-force SSH logins from subnets Note: Fail2ban 0.10.2 on 2020/12/22 Install firewall ufw and log analyzer fail2ban: sudo apt update sudo apt install ufw fail2ban (PiOS Buster: the sshd jail is enabled by default via /etc/fail2ban/jail.d/defaults-debian.conf) Copy… Read more »
What is Zabbix monitoring? Zabbix is an enterprise-class open source distributed monitoring solution. Zabbix is software that monitors numerous parameters of a network and the health and integrity of servers. Zabbix uses a flexible notification mechanism that allows users to configure e-mail based alerts for virtually any event. This allows… Read more »
I setup a CentOS 7 server recently, that regrettably needs open SSH to the outside world. As I don’t dabble in CentOS that much, I thought I’d write out the instructions for myself and others to install fail2ban. This will block people trying to bruteforce your server with lots of… Read more »
By far the most popular and easy to setup firewall for Ubuntu is UFW, which stands for the ‘Uncomplicated FireWall’. In this tutorial I’ll provide some examples for setups with UFW. I tested the following lines on a fresh Ubuntu 16.04 installation, but this should all work the same with… Read more »
When checking my cloned Ubuntu 14.04 LTS VM, I noticed that it still contained the volume group name from the original, which is of course not desired. It seemed fairly simple, but I kept receiving an error with update-grub, reporting the old Volume Group name: /usr/sbin/grub-probe: error: failed to get… Read more »
Eth0 static IP address configuration On the latest version of Raspbian (in my case, Raspbian GNU/Linux 8), you should not use /etc/network/interfaces to set up your networks. All configuration has been offloaded to the dhcpcd client. For a static IP address on the eth0 interface, you’ll need to edit file /etc/dhcpcd.conf For… Read more »
I just installed a new Ubuntu 13.04 server and thought I’d look into using gmail as relayhost for Postfix instead of Exim for a change. Postfix is the default MTA (mail transfer agent) on Ubuntu, so let’s set it up already… Installing packages: sudo apt-get install postfix ca-certificates libsasl2-2 libsasl2-modules… Read more »
Found this handy python script for sharing Clementine song status in Empathy….. regrettably it did not work on my Ubuntu 12.10 desktop installation…. Apparently you have to add a line (see the second line) about the character encoding nowadays….. so just to make it easier for other people… here’s the… Read more »