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Learn how to implement a default-deny network policy on Ubuntu Server using UFW to block unauthorized access while maintaining SSH and web service connectivity.
I have installed GitLab on a cloud VM and shortly after stood up a second VM as a postfix server with the same provider (Hetzner) I first noticed a problem when I went back to the GitLab server to enable SMTP Email and nothing was being sent, not even any logs on the mail server to say a connection was attempted. On the GitLab server I tried to ping the mail
UFW Application Profiles and Rule Ordering The Uncomplicated Firewall (UFW) allows the activation of predefined service rules through application profiles. When a user executes ufw allow for a specific profile, UFW translates these profiles into underlying iptables or nftables rules. A challenge arises when combining application profiles with custom manual r
ubuntu