ufw firewall & ssh in iptables

iptables

@@ -20,6 +20,9 @@ iptables -A INPUT -i eth0 -p tcp --dport 902 -j REJECT --reject-with icmp-port-u
 # icmp-admin-prohibited
 # tcp-reset
 
+# To only allow ssh on the server and block all other ports
+iptables -A INPUT -p tcp --dport 22 -j ACCEPT 
+
 # To add a comment to a rule:
 iptables ... -m comment --comment "This rule is here for this reason"
 

ufw

@@ -0,0 +1,29 @@
+# To check the status of the firewall:
+ufw status
+
+# To check the status with more details:
+ufw status verbose
+
+# To allow a port on the firewall by its name:
+ufw allow <port-name>
+ufw allow http
+ufw allow https
+ufw allow ssh
+ufw allow ftp
+
+# To allow a port on the firewall by its number:
+ufw allow <port-number>
+ufw allow 5432
+
+# To delete an allowed port rule on the firewall:
+ufw delete allow 5432
+
+# To block a port on the firewall:
+ufw deny 21
+
+# To enable the firewall and activate the rules:
+ufw enable
+
+# To disable the firewall and deactivate the rules:
+ufw disable
+