diff --git a/linux/linux-firewall.md b/linux/linux-firewall.md
index 93afa7e..3f5ba45 100644
--- a/linux/linux-firewall.md
+++ b/linux/linux-firewall.md
@@ -2,7 +2,7 @@
 title: Firewall Linux
 description: Firewall Konfiguration unter Linux
 published: true
-date: 2026-03-16T00:18:21.422Z
+date: 2026-03-16T00:20:01.180Z
 tags: firewall, linux
 editor: markdown
 dateCreated: 2026-03-15T23:56:44.726Z
@@ -48,4 +48,8 @@ sudo ufw status numbered
 ```bash
 ufw limit 22/tcp
 ```
+2) Das blockiert automatisch IPs bei Login-Angriffen
+```bash
+apt install fail2ban
+```