#firewall
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OPNsense Hardware Requirements: How to Size a Box
OPNsense hardware requirements explained: the official CPU, RAM and disk tiers, what state tables and Suricata add, and why ARM boards are not supported.
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OPNsense WireGuard Not Connecting: Handshake Fixes
Why an OPNsense WireGuard tunnel shows no handshake, connects but passes no traffic, or stalls on large transfers, and how to isolate each cause in order.
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OPNsense Firewall Rules and NAT: How They Work
How OPNsense firewall rules, NAT and interfaces fit together: per-interface evaluation, rule order, stateful returns, and the mistakes each causes.