Changes between Version 12 and Version 13 of Csle2022/Agenda/FW

Timestamp:

Oct 20, 2022, 2:22:31 PM (3 years ago)

Author:

geethike

Comment:

--

Csle2022/Agenda/FW

@@ -147 +147 @@
 sudo iptables -A INPUT -s 192.168.1.3 -p tcp --dport 22 -j ACCEPT
 }}}
+
+'''3. Deleting a rule from the iptable :'''
+
+'''Syntax:-'''
+{{{
+sudo iptables -D chain_name rule_number
+}}}
+'''Example:-'''[[BR]]
+If we want to delete the rule which accepts the traffic to port 22 and which we have added in the previous section, then:-
+{{{
+sudo iptables -D INPUT 1
+}}}
+Remember the rules number starts from 1
+
+'''4. Saving your configuration :'''
+This part is unnecessary if you are implementing it on a personal computer which is not a server, but if
+you are implementing a firewall on a server, then there are high chances that your server might get corrupted and
+you might lose all your data. So, it’s always better to save your configurations.
+
+There are a lot of ways to do this, but the easiest way I find is with '''iptables-persistent''' package. You can download the package from Ubuntu’s default repositories:
+{{{
+sudo apt-get update
+sudo apt-get install iptables-persistent
+}}}
+Once the installation is complete, you can save your configuration using the command:-
+{{{
+sudo invoke-rc.d iptables-persistent save
+}}}