IRCNow

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Setting up OpenBSD's default web server, openhttpd, is relatively simple. Start off by copying the example file in /etc/examples/httpd.conf:

$ doas cp /etc/examples/httpd.conf /etc/httpd.conf

Here is what /etc/httpd.conf contains:

server "example.com" {
        listen on * port 80
        location "/.well-known/acme-challenge/*" {
                root "/acme"
                request strip 2
        }
        location * {
                block return 302 "https://$HTTP_HOST$REQUEST_URI"
        }
}

server "example.com" {
        listen on * tls port 443
        tls {
                certificate "/etc/ssl/example.com.fullchain.pem"
                key "/etc/ssl/private/example.com.key"
        }
        location "/pub/*" {
                directory auto index
        }
        location "/.well-known/acme-challenge/*" {
                root "/acme"
                request strip 2
        }
}

You must replace example.com everywhere with your domain name.

Simply enable and start the web server:

$ doas rcctl enable httpd
$ doas rcctl start httpd

Make sure pf allows incoming http connections by putting this line into /etc/pf.conf:

pass in proto tcp to port {http https}

Then, reload the pf rulesets:

$ doas pfctl -f /etc/pf.conf

Now you will almost certainly want openhttpd to use an SSL cert, so follow the acme-client instructions, then reset your web server:

$ doas rcctl restart httpd

At this point, you should test to see if the web server is working on port 80. This test should be run on some other computer besides the web server (your local workstation is fine).

$ nc ircnow.org 80
GET index.html HTTP/1.0

You should a response similar to the one below:

HTTP/1.0 408 Request Timeout
Date: Mon, 11 Nov 2019 05:06:06 GMT 
Server: OpenBSD httpd       
Connection: close 
Content-Type: text/html         
Content-Length: 439

s_client -connect example.com:443

To test if your web server is working and has a correct SSL cert, run:

$ openssl s_client -connect example.com:443

You should see the correct SSL subject and issuer:

subject=/CN=test.ircnow.org
issuer=/C=US/O=Let's Encrypt/CN=Let's Encrypt Authority X3