Create the simplest possible firewall using nftables framework with relaxed rules that will allow all outgoing traffic, incoming ICMP echo requests, and ssh connections.
Use the native IPsec stack to connect multiple networks over the internet.
Configure the Vagrant virtual machine to use a specific proxy using the vagrant-proxyconf plugin.
Define custom Nginx log format to store SSL cipher and protocol information.
Trace packets as they pass through the iptables firewall.
Enforce specific referer header using nginx directives.
Enable debugging log in Nginx to inspect internal behavior and upstream interactions.
Automatically clear GNU Bourne-Again SHell history when you exit a login shell.