Mastering Linux Security and Hardening

nftables – a more universal type of firewall system

Let's now turn our attention to nftables, the new kid on the block. So, what does nftables bring to the table? (Yes, the pun was intended.):

• You can now forget about needing separate daemons and utilities for all of the different networking components. The functionality of iptables, ip6tables, ebtables, and arptables is now all combined in one neat package. The nft utility is now the only firewall utility that you'll need.
• With nftables, you can create multidimensional trees to display your rulesets. This makes troubleshooting vastly easier, because it's now easier to trace a packet all the way through all of the rules.
• With iptables, you have the filter, NAT, mangle, and security tables ...