I set up a Slack bot on my OpenBSD server. When I needed to route traffic to it, I needed to use a new tool in the OpenBSD toolbox: relayd.

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A walkthrough of setting up a reverse proxy on OpenBSD using relayd to route HTTPS traffic between a personal website (served by httpd) and a Slack bot running on port 3000. Covers the full relayd.conf configuration with host-based and path-based routing rules, adjustments to httpd.conf to move it off port 443 to port 81, acme-client certificate naming for Let's Encrypt compatibility, and using curl's --connect-to flag to test the setup behind the proxy.

A Webserver and a Slack Bot on OpenBSD: Introducing relayd