A Linux and Cybersecurity expert in Australia. RHCE, Linux+, Sec+, CySA+, CASP+, CISM
All HowTo's Cybersecurity Linux Ubuntu, Mint & Debian Linux

Installing Graylog Open on Ubuntu 22.04

This article is a walkthrough for installing “Graylog Open 6” and leverages the documentation at “https://go2docs.graylog.org/current/downloading_and_installing_graylog/ubuntu_installation.html” and “https://www.mongodb.com/docs/manual/tutorial/install-mongodb-on-ubuntu/”. We’re using Ubuntu 22.04 because 24.04 is not supported using the documentation linked above. We’re starting from a fresh “standard” Ubuntu 22.04 installation. Our resources are “4GB RAM, 8 CPU Cores, 25GB

Read more
All HowTo's Cybersecurity pfSense & Netgate

pfSense Cannot allocate memory with pfBlockerNG – Firewall Rules Not Working

This article discusses the cause and solution to the error message “Cannot allocate memory” relating to pfBlockerBG. In this scenario, we’re using a Netgate 2100 Base firewall appliance. The firewall was receiving the following error message when reloading the filter rules (in “Status – Filter Reload“). There were error(s) loading

Read more