iptables

• Overview
• Prerequisites
• Quick Architecture
• Install / Setup
• Base Configuration
• Reload/Enable & Health Checks
• Security / Hardening
• Performance & Optimization
• Backup & Restore
• Troubleshooting (Top issues)
• Key Takeaways & Next Steps

Overview

This guide walks you through a practical wireguard site to site vpn setup. You will build a site-to-site tunnel between two Linux gateways (WG‑A & WG‑B), route two LANs, persist configs, secure with firewall, and verify connectivity.

Prerequisites

• OS: Ubuntu/Debian, RHEL/Rocky/Fedora, Arch/Manjaro, openSUSE/SLE
• Ports: UDP 51820 open between gateways
• Placeholders: WG_IF=wg0, LAN_A=10.10.1.0/24, LAN_B=10.10.2.0/24, WG_NET=10.10.10.0/24.
• Reference: WireGuard official docs: https://www.wireguard.com/#documentation

Quick Architecture

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