How to avoid or fix this problem for intranet. I want to fix this for localhost.
I’m using centos7 and apache
Saving debug log to /var/log/letsencrypt/letsencrypt.log
Plugins selected: Authenticator apache, Installer apache
Starting new HTTPS connection (1): acme-v02.api.letsencrypt.org
Which names would you like to activate HTTPS for?
Select the appropriate numbers separated by commas and/or spaces, or leave input
blank to select all options shown (Enter ‘c’ to cancel): 1
Obtaining a new certificate
Performing the following challenges:
http-01 challenge for dvwa.lab.net
Waiting for verification…
Cleaning up challenges
Failed authorization procedure. dvwa.lab.net (http-01): urn:ietf:params:acme:error:dns :: DNS problem: SERVFAIL looking up A for dvwa.lab.net