Firewall - nftables

Basic

Using nftables as the successor to iptables makes life much more convenient. So I switched to nftables at my projects.

For debian (bookworm) it's necessary to enable the nftables service:

systemctl enable nftables.service

Default configuration file for nftables is located at: /etc/nftables.conf. I don't want to make big modifications at preinstalled files, so I just add an include statement for customized rules:

include "/etc/custom/nftables.rules" 

Here are some basic commands for nftables

List loaded ruleset

nft list ruleset

List sets 
The following command lists the set WHITELIST of table CUSTOM

nft list set inet CUSTOM WHITELIST