도메인 확인을 통과할 수 없습니다

./discourse-setup 을 사용하려고 하는데 문제가 발생했습니다.

Checking your domain name . . .
WARNING: Port 443 of computer does not appear to be accessible using hostname:  www.doublekm.xyz.
WARNING: Connection to http://www.doublekm.xyz (port 80) also fails.

This suggests that www.doublekm.xyz resolves to some IP address that does not reach this 
machine where you are installing discourse.

The first thing to do is confirm that www.doublekm.xyz resolves to the IP address of this server.
You usually do this at the same place you purchased the domain.

If you are sure that the IP address resolves correctly, it could be a firewall issue.
A web search for "open ports YOUR CLOUD SERVICE" might help.

This tool is designed only for the most standard installations. If you cannot resolve
the issue above, you will need to edit containers/app.yml yourself and then type

./launcher rebuild app

포트 및 방화벽 상태

[root@GreenCloud discourse]# netstat -lnptu | grep :443
[root@GreenCloud discourse]# netstat -lnptu | grep :80
tcp        0      0 173.249.197.58:8079     0.0.0.0:*               LISTEN      11225/filebrowser   
[root@GreenCloud discourse]# firewall-cmd --permanent --list-ports
8080/tcp 8079/tcp 80/tcp 443/tcp

DNS 설정


핑 테스트

[root@GreenCloud discourse]# ping www.doublekm.xyz
PING doublekm.xyz (173.249.197.58) 56(84) bytes of data.
64 bytes from GreenCloud.1671433874 (173.249.197.58): icmp_seq=1 ttl=64 time=0.062 ms
64 bytes from GreenCloud.1671433874 (173.249.197.58): icmp_seq=2 ttl=64 time=0.066 ms
64 bytes from GreenCloud.1671433874 (173.249.197.58): icmp_seq=3 ttl=64 time=0.118 ms
64 bytes from GreenCloud.1671433874 (173.249.197.58): icmp_seq=4 ttl=64 time=0.176 ms
64 bytes from GreenCloud.1671433874 (173.249.197.58): icmp_seq=5 ttl=64 time=0.069 ms
64 bytes from GreenCloud.1671433874 (173.249.197.58): icmp_seq=6 ttl=64 time=0.231 ms
64 bytes from GreenCloud.1671433874 (173.249.197.58): icmp_seq=7 ttl=64 time=0.104 ms
^Z
[3]+  Stopped                 ping www.doublekm.xyz

discourse-setup 스크립트를 읽어보면, 해당 테스트를 건너뛰기 위해 추가할 수 있는 커맨드 라인 스위치가 있습니다. (아마 --skip-tests였던 것 같습니다.)

실패하는 이유는 보이지 않습니다. 테스트에 사용되는 구성 요소들이 설치되어 있는지 확인하기 위한 테스트라고 생각합니다.