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--- content:serverbasics [2025/02/09 10:22] – [How to Start] Daniel
+++ content:serverbasics [2025/03/26 10:39] (aktuell) – [Last words] Daniel
@@ Zeile 10: / Zeile 10: @@
 This Document is currently under developement and chapters are not final right now. This will change in the Future.
-===== Which Usecase =====
+===== Usecase =====
 This is not a slim Setup - so if you only have old hardware or you are trying to figure out on yoru small office-pc, this may not work as well as you need it.
@@ Zeile 24: / Zeile 24: @@
   * A Server, that has relyable, quite fast internet in Download and Upload rates - while Upload may be more Importen
   * The Server should be reachable all the time
 ===== How to Start =====
@@ Zeile 611: / 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>