My DO firewall (not UFW) is set up to allow only HTTPS and SSH.
sudo apt-get update
fails with
Err:1 http://mirrors.digitalocean.com/ubuntu focal InRelease Temporary failure resolving ‘mirrors.digitalocean.com’
but is ok when the firewall is disabled
What rules would I add to the firewall to allow ‘apt-get update’ ?
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Hi, How do the outbound rules look like in your firewall’s settings ? Default settings are like below
All outgoing traffic is allowed by default, and it is OK for most implementations.