Firewall
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OPNsense WireGuard Site to Site Tunnel: Routing Setup
Connect two OPNsense networks with WireGuard, preserve IoT isolation, configure Allowed IPs and firewall rules, and troubleshoot CGNAT
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OPNsense Requirements: Minimum and Recommended Hardware
OPNsense needs a 64-bit x86 CPU and 3 GB RAM at minimum, 8 GB and a 120 GB SSD recommended. See how states, Suricata, ZFS ARC and NICs change the sizing.
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OPNsense WireGuard Setup Problems: Handshake, NAT, MTU
Fix an OPNsense WireGuard tunnel that won't connect: read the handshake, then check the WAN rule, keys, allowed addresses, outbound NAT, DNS and MTU.