I know same topic is already posted and answered. Well, I don't find any solution for my problem so posting here.
Tried solving issue after reading this topic: During secondary validation - DNS problem: networking error looking up A but unfortunately didn't work.
Meanwhile I generated certificate using Wild Card solution. But afraid for renewal. It may stop generating certificate on renewal time.
My domain is: www.homeindiainfratech.com
I ran this command: certbot -d www.homeindiainfratech.com --nginx
It produced this output:
Obtaining a new certificate Performing the following challenges: http-01 challenge for www.homeindiainfratech.com Waiting for verification... Challenge failed for domain www.homeindiainfratech.com http-01 challenge for www.homeindiainfratech.com Cleaning up challenges Some challenges have failed. IMPORTANT NOTES: - The following errors were reported by the server: Domain: www.homeindiainfratech.com Type: dns Detail: During secondary validation: DNS problem: networking error looking up A for www.homeindiainfratech.com
My web server is (include version): nginx/1.18.0 (Ubuntu)
nginx version: nginx/1.18.0 (Ubuntu) built with OpenSSL 1.1.1 11 Sep 2018 (running with OpenSSL 1.1.1f 31 Mar 2020) TLS SNI support enabled
The operating system my web server runs on is (include version): Ubuntu 20.04.1 LTS
Distributor ID: Ubuntu Description: Ubuntu 20.04.1 LTS Release: 20.04 Codename: focal
My hosting provider, if applicable, is: DigitalOcean
I can login to a root shell on my machine (yes or no, or I don't know): Yes
I'm using a control panel to manage my site (no, or provide the name and version of the control panel): no
The version of my client is (e.g. output of
certbot --version or
certbot-auto --version if you're using Certbot): certbot 0.40.0