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Updated article Postinstallation Tasks.

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pboy 2026-05-03 08:26:51 +02:00
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modules/ROOT/partials/installation/post-install/install-fail2ban.adoc
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// Text excerpt about installing fail2ban
// consumer postinstallation-tasks.adoc (main), hetzner-dc.adoc
The software monitors the log files for authentication errors. In case of multiple retries from the same IP address, it reconfigures the firewall on the fly to block the source IP This is to prevent brute force methods for cracking passwords and bots checking for weak passwords. However, a system administrator may also lock himself out, if if they happen to make a mistake. Therefore, you can exclude destinct IP addresses, e.g. the administrators desktop, from blocking.
The software monitors the log files for authentication errors. In case of multiple retries from the same IP address, it reconfigures the firewall on the fly to block the source IP. This is to prevent brute force methods for cracking passwords and bots checking for weak passwords. However, a system administrator may also lock himself out, if they happen to make a mistake. Therefore, you can exclude destinct IP addresses, e.g. the administrators desktop, from blocking.
a. Installation of the software and the required Postfix
a. Installation of the software
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modules/ROOT/partials/installation/post-install/manage-dnf-updates.adoc
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// Text excerpt about managing system updates.
// consumer postinstallation-tasks.adoc (main), hetzner-dc.adoc
//
Fedora includes a tool, dnf-automatic, which supports several modes of update automation:
do not apply, notify admin, apply and notify admin, apply without notification. In particular, alternatives 2 and 3 are definitely worth considering. A general principle might be: Alternative 2 is the minimum choice for almost any system, alternative 3 is not at all suitable for critical systems that must not fail under any circumstances.