TOPIC / TAG
Notes in firewall
2 articles
fail2ban for SSH on Debian 13
Install fail2ban on Debian 13, understand the sshd jail the package already enables, tune bans in a local override, and check, test, and undo bans safely.
ufw Without Locking Yourself Out
Set up ufw on a Debian or Ubuntu VPS with SSH allowed first, a timed rollback in case a rule is wrong, and a clear view of the Docker ports ufw cannot see.