Как разблокировать порты 80 и 443, закрытые в NMAP

[Lilly (Lillian)]

Может, стоит посмотреть эту тему:

Port 80/443 not accessible while installing Discourse

Sounds like you’re doing the right stuff. You’re sure that your DNS resolves to your server IP and only there? Oh. I can’t tell at quick glance whether discourse-setup look only at IPv4. You might try running ./discourse-setup --skip-connection-test to skip the test.