This article provides a step-by-step guide on manually configuring IPv4 and IPv6 firewall rules for a cloud server running Ubuntu 22.04 using iptables. It covers allowing local loopback interfaces, established connections, specific service ports, and limiting SSH login attempts. Additionally, it explains how to persist firewall rules across reboots using iptables-persistent, ensuring your server's security settings are maintained automatically. Ideal for users who need to manage their server's firewall configurations without a web interface.
Learn how to configure IPv6 firewall rules in OpenWRT to allow specific client addresses and ports. This guide covers both LUCI web interface and NFT command line methods to ensure secure and flexible network access to home services like WireGuard, Jellyfin, and more.
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