All the network traffic between local networks and external networks has to be carefully monitored and inspected by means of a packet filtering application or a reliable firewall whether an application or dedicated hardware located at the edge of their networks. In this article, we delve deep into the features and functions alongside all the modules of nftables, a leading packet-filtering framework for the Linux environment. This comprehensive guide to nftables step by step gives you an insight into how to utilize this framework to secure your networks as much as possible.