No route to host when I ran certbot

My domain is:

I ran this command: certbot certonly --non-interactive --standalone --agree-tos -m -d

It produced this output: Requesting No route to host

Operating system: Ubuntu 20.04

Hi @nguyenanhdung191, and welcome to the LE community forum :slight_smile:

Seems like a routing issue...
Please show the outputs of:
netstat -nr
ifconfig | grep inet


After we fix the routing issue, we need to address the use of --standalone.
Noting that there is a web server responding:

curl -Ii
HTTP/1.1 403 Forbidden
Date: Tue, 30 Aug 2022 04:14:02 GMT
Server: Apache
Content-Type: text/html; charset=iso-8859-1

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