Basic Firewall Setup with nftables
Arch Linux comes with IPv6 enabled by default, so firewall rules must also cover IPv6 traffic. While iptabels and ip6tables are traditional tools, nftables handles both IPv4 and IPv6 through the inet address family or separate ip and ip6 tables. A graphical interface for managing both is firewalld.
Basic Firewall Configuration
The configurat ...
Posted on Sun, 17 May 2026 05:50:29 +0000 by Siggles
IPv4 Addressing Architecture: Classes, Masks, and Reserved Ranges
Class A Networks
The leading bit of a Class A address is always 0. This allocation leaves 7 bits for the network portion and 24 bits for the host portion.
First Octet Range: 1 to 126 (00000001 to 01111111)
Default Subnet Mask: 255.0.0.0 (/8)
Host Capacity: 2^24 - 2 = 16,777,214 usable hosts per network (subtracting the network identifier and t ...
Posted on Mon, 11 May 2026 00:02:24 +0000 by marty_arl