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--- content:serverbasics [2025/02/11 08:43] – [Which Usecase] obel1x
+++ content:serverbasics [2025/03/26 11:39] (aktuell) – [Last words] obel1x
@@ Zeile 612: / Zeile 612: @@
 And with FACLs there are powerful tools that should cover everything an administrator needs.
+===== Firewall =====
+To check, which services are open, use:
+PLEASE, Before opening the Ports, check the Services described at the Sub-Pages first to secure them!
+<code>
+servername:~ # firewall-cmd --list-ports
+/tcp 3478/udp
+servername:~ # for s in $(firewall-cmd --list-services); do firewall-cmd --permanent --service "$s" --get-ports; done;
+/udp
+/tcp 53/udp
+/tcp
+/tcp
+/tcp 88/udp
+/tcp
+/tcp
+/tcp 873/udp
+/tcp
+</code>