Problem binding to port 80: Could not bind to IPv4 or IPv6.

ssl 인증서 발급 과정에서 에러가 났다.

 

해결 : 80번 포트를 점유할 수 있도록 기존 웹 프레임워크나 혹은 서버 프로그램을 종료하기

ubuntu:~$ sudo lsof -i :80
COMMAND  PID     USER   FD   TYPE DEVICE SIZE/OFF NODE NAME
nginx   1031     root    6u  IPv4  25900      0t0  TCP *:http (LISTEN)
nginx   1031     root    7u  IPv6  25901      0t0  TCP *:http (LISTEN)
nginx   1032 www-data    6u  IPv4  25900      0t0  TCP *:http (LISTEN)
nginx   1032 www-data    7u  IPv6  25901      0t0  TCP *:http (LISTEN)
ubuntu:~$ kill 1031

or

ubuntu:~$ sudo systemctl stop nginx

 

SSL 인증서 발급받기 (standalone)

ubuntu:~$ sudo apt-get install certbot
ubuntu:~$ sudo certbot certonly --standalone -d 도메인주소
Saving debug log to /var/log/letsencrypt/letsencrypt.log
Plugins selected: Authenticator standalon
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IMPORTANT NOTES:
 - Congratulations! Your certificate and chain have been saved at:
   /etc/letsencrypt/live/도메인주소/fullchain.pem
   Your key file has been saved at:
   /etc/letsencrypt/live/green27.duckdns.org/privkey.pem
   Your cert will expire on 2022-10-03. To obtain a new or tweaked
   version of this certificate in the future, simply run certbot
   again. To non-interactively renew *all* of your certificates, run
   "certbot renew"

# Nginx에 SSL 연결
ubuntu:~$ sudo vi /etc/nginx/sites-availables/default

server {
        listen 80;
        listen [::]:80;
        
        # HTTPS를 위한 443 포트 개방
        listen 443 ssl;
        listen [::]:443 ssl;

        root /var/www/html;

        server_name 도메인주소;
        
        #SSL 인증서를 넣어준다.
        ssl_certificate /etc/letsencrypt/live/도메인주소/fullchain.pem;
        ssl_certificate_key /etc/letsencrypt/live/도메인주소/privkey.pem;

        location / {
                proxy_pass http://localhost:8080;
        }
}
# :wq 저장후 리로딩

ubuntu:~$ sudo service nginx reload
ubuntu:~$ sudo service nginx restart