In the past, Certbot was probably validating using port 443 with the TLS-SNI-01 challenge type. But Let's Encrypt is phasing TLS-SNI-01 out, and Certbot recently switched to prefer using the port 80 HTTP-01 challenge in version 0.28.0 (though it still supports both for now).
mnordhoff
22
Related topics
| Topic | Replies | Views | Activity | |
|---|---|---|---|---|
| " Unable to find a virtual host listening on port 80" - system not using virtual hosts | 3 | 1448 | June 13, 2019 | |
| Unable to find a virtual host listening on port 80 | 8 | 2504 | March 4, 2019 | |
| Unable to find a virtual host listening on port 80 | 16 | 1482 | March 12, 2019 | |
| Unable to find a virtual host listening on port 80 with two virtual hosts | 9 | 86 | March 31, 2025 | |
| Virtual host listening on port 80 needed to prove that you control your domain | 17 | 1007 | July 17, 2021 |