https://securityarchitects.com/tags/open-source/ Recent content in Open-Source on Security Architects Hugo en-us Tue, 14 Jul 2026 10:00:00 -0700 https://securityarchitects.com/post/authinator3-open-source/ Tue, 14 Jul 2026 10:00:00 -0700 https://securityarchitects.com/post/authinator3-open-source/ <p>We&rsquo;ve published the core of <strong>Authinator3</strong> as open source under the ISC license: <a href="https://gitlab.com/jowolf/authinator3">gitlab.com/jowolf/authinator3</a>.</p> <p>Authinator is a web login gateway for firewalls. Authenticate over HTTPS, click once, and your current IP address is granted passage through the firewall — everyone else sees a wall. It replaces both permanently-open management ports and brittle port-knocking schemes with something anyone can operate from a phone: a login page.</p> <p>Authinator has guarded our own production gateways in one form or another since 2007. Authinator3 is the modernized cross-platform release: a single self-contained Go binary per platform, driving OpenBSD <code>pf</code> tables (confined by <code>pledge</code>/<code>unveil</code>, no sudo, no shell calls) or Linux <code>nftables</code> sets (under a locked-down systemd service). Default-deny, explicit allow, with an audit view of every address currently cleared through.</p>