About OPNsense Router
OPNsense Router is about the routing box itself: how to size the hardware it runs on, how interfaces, firewall rules and NAT relate to each other, how the state table consumes memory, which VPN protocol to put on it, and what to check when a tunnel comes up but carries nothing.
It is written for people who can follow a setup guide but want to understand why the rule they added did not fire, and for people choosing hardware before they have anything to configure. Claims are traced to the OPNsense documentation and the underlying FreeBSD, Suricata and WireGuard references, and every article lists the sources it drew on.
Start here
- OPNsense hardware requirements - the official CPU, RAM and disk tiers, what state tables and intrusion detection add, and why ARM boards are out of scope.
- WireGuard site-to-site tunnel - linking two OPNsense networks with a persistent tunnel, the allowed IPs on each peer, and the routes each side needs.
- WireGuard vs OpenVPN vs IPsec - which of the three built-in VPN options fits which kind of tunnel.
- WireGuard troubleshooting - no handshake, handshake but no traffic, and stalled large transfers, isolated in that order.
- State table and bandwidth sizer - turns a target connection count, ruleset tier and WAN speed into a memory and core figure.
What is covered here
- Configuration
- Hardware
- Networking
- Troubleshooting
- VPN
5 articles are published so far. New articles are announced on the RSS feed; there is no fixed publishing schedule and this site does not promise one.
How these articles are produced
Articles are researched from primary sources: vendor and project documentation, published standards and specifications, release notes, advisories, and measurements published by the people who took them. Drafts are produced with AI assistance and then edited against those same sources before anything is published. Where a figure comes from a datasheet or a third-party measurement, the article names the source and links to it so you can check the original rather than take this site's summary of it.
Everything here is published under the OPNsense Router Editorial byline. That is an editorial desk, not a person, and no article on this site claims hands-on lab testing, benchmarking, or first-hand measurement. Nothing here should be read as a report of something this site physically tested.
Corrections
Getting it right matters more than getting it first. If something on this site is wrong, out of date, or missing the source it should cite, email [email protected] with the page and the specific claim. Substantive corrections are made on the page itself rather than quietly dropped.
How this site is funded
This site currently runs no affiliate links, no sponsored content, no paid placement, and no display advertising. Nothing on it earns a commission. If that changes, this page and the disclosure page will say so before any such link appears.
The full position is on the disclosure page. Read it before acting on anything here that reads like a buying recommendation.
Related sites
OPNsense Router is run alongside a small number of other single-topic sites:
- OPNsenseLab - OPNsense guides, configs, and hardware for serious homelabs.
- N100Firewall - Intel N100 Fanless Micro Firewalls, 2.5GbE & Hardware Specs.
- pfSense Router Guide - pfSense Firewall Hardware Appliances, Snort IDS/IPS & WireGuard VPN Sizing
- pfSenseLab - pfSense and pfSense Plus configuration for homelabs.
- WireGuardLab - WireGuard protocol and deployment guides
Contact
Email: [email protected]
Site: opnsenserouter.com
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