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Author: denevell

unix-firewall-iptables.md

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+Title: Unix: Using iptables
+Tags:  unix-iptables,unix
+
+First create a ipfilters firewall file. Call it ipfilter.firewall.rules for example. Here's an example: http://library.linode.com/securing-your-server#sph_creating-a-firewall
+
+* -A means append the rule to the end of the table with the table specified, such as INPUT. 
+* -j means perform this action on matching the rule, REJECT for example.
+* -i specifies the interface to listen on. 
+* -d specifies the destination including the network mask.
+* --dport specifies the destination port
+* -p specifies the protocol, such as tcp
+
+You can then set it as your firewall like so:
+
+	iptables-restore < iptables.firewall.rules
+
+Then you can list all the added rules via
+
+	iptables -L