added network iptables

Author: asim3 from runner

data/server/firewall.md renamed to data/server/network/firewall.md

@@ -0,0 +1,16 @@
+## list iptables
+```bash
+iptables -L
+# Permission denied (you must be root)
+
+
+sudo iptables -L
+# Chain INPUT (policy ACCEPT)
+# target        prot       opt    source    destination         
+
+# Chain FORWARD (policy ACCEPT)
+# target        prot       opt    source    destination         
+
+# Chain OUTPUT (policy ACCEPT)
+# target        prot       opt    source    destination         
+```

data/server/network/iptables.md

@@ -33,9 +33,3 @@ route
 # 172.23.0.0      0.0.0.0         255.255.0.0     U     0      0        0 br-44526eaa5e73
 # 192.168.122.0   0.0.0.0         255.255.255.0   U     0      0        0 virbr0
 ```
-
-
-## list iptables
-```bash
-sudo iptables -L
-```