Few weeks ago in one of the servers we faces strange issue: The website couldn’t send emails using remote SMTP.
First i thought it was related to SMTP port, credentials etc. – but everything was OK there. So then i tries to ping google.com and got surprised. It wasn’t worked. Simple ping didn’t work.
So it was obviously corrupted DNS issue.
First i tried the easier way, which is recommended by developers.google.com, adding Google DNS IP addresses to resolv.conf file
sudo vi /etc/resolv.conf
But it didn’t help.
So i decided to go into deeper and solving it using netplan.Continue reading “How to use Google DNS in Ubuntu/Debian permanently”