Back in 2002 I wrote one of the first tutorials in Italian about how to use the then excitingly new 'iptables' command and firewalling support in linux. This tutorial was quite popular at the time, ...

All modern operating systems come equipped with a firewall – a software application that regulates network traffic to a computer. Firewalls create a barrier between a trusted network (like an office ...

Iptables, more properly referred to as “iptables/netfilter” because of the two modules that are involved — the userspace module “iptables” and the kernel ...

Linux may have a reputation for security, but it isn’t perfect. Many distributions also don’t have the best security defaults, so it’s best to implement some best practices for security or use open ...

Let's talk about protecting your network from what people can fetch. I'm going to take a twisty road to get there, so please stick with me. I wrote a lengthy report ...

nftables provides a simpler, more efficient alternative to iptables, with unified IPv4/IPv6 handling. Features like rule tracing and multi-action rules in nftables enhance network management.