diff --git a/firewall/iptables.py b/firewall/iptables.py
index c06a2dd3..9983c27a 100644
--- a/firewall/iptables.py
+++ b/firewall/iptables.py
@@ -27,11 +27,22 @@ __license__ = "GPL"
 from firewall import Firewall
 
 class Iptables(Firewall):
+	""" This class contains specific methods and variables for the
+		iptables firewall. Must implements the 'abstracts' methods
+		banIP(ip) and unBanIP(ip).
+		
+		Must adds abstract methods definition:
+		http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/266468
+	"""
 	
 	def banIP(self, ip):
+		""" Returns query to ban IP.
+		"""
 		query = "iptables -I INPUT 1 -i eth0 -s "+ip+" -j DROP"
 		return query
 	
 	def unBanIP(self, ip):
+		""" Returns query to unban IP.
+		"""
 		query = "iptables -D INPUT -i eth0 -s "+ip+" -j DROP"
 		return query