Packet Filtering with nftables on Linux (opens in new tab)

iptables is probably the most used firewall by all sysadmin in the Linux ecosystem. The most recent wave of Linux admins are using ufw as well, mostly due to Ubuntu. Coming from BSD world, I was using ipfw (on FreeBSD), packet-filter (on FreeBSD and OpenBSD), and hated iptables for its confusing interface. Time passed and nftables came along the road as a stable alternative to iptables. So, let have some fun with it. This post is not about NAT or packet forwarding. Those topics will require a...