diff --git a/systemvm/patches/debian/config/opt/cloud/bin/cs/CsAddress.py b/systemvm/patches/debian/config/opt/cloud/bin/cs/CsAddress.py
index df88772a9d7..ed0d4d3ec75 100644
--- a/systemvm/patches/debian/config/opt/cloud/bin/cs/CsAddress.py
+++ b/systemvm/patches/debian/config/opt/cloud/bin/cs/CsAddress.py
@@ -295,7 +295,7 @@ class CsIP:
             self.fw.append(["filter", "", "-A INPUT -i %s -p tcp -m tcp --dport 53 -j ACCEPT" % self.dev])
             self.fw.append(["filter", "", "-A INPUT -s %s -i %s -p tcp -m state --state NEW" +
                             "-m tcp --dport 8080 -j ACCEPT" % (self.address['network'], self.dev)])
-            self.fw.append(["filter", "", "-A INPUT -i %s -p tcp -m tcp --dport 80 -m state --state NEW -j ACCEPT" self.dev])
+            self.fw.append(["filter", "", "-A INPUT -i %s -p tcp -m tcp --dport 80 -m state --state NEW -j ACCEPT" % self.dev])
             self.fw.append(["filter", "", "-A FORWARD -i %s -o eth1 -m state --state RELATED,ESTABLISHED -j ACCEPT" % self.dev])
             self.fw.append(["filter", "", "-A FORWARD -i %s -o %s -m state --state NEW -j ACCEPT" % self.dev])
             self.fw.append(["filter", "", "-A FORWARD -i eth2 -o eth0 -m state --state RELATED,ESTABLISHED -j ACCEPT"])
diff --git a/systemvm/patches/debian/config/opt/cloud/bin/cs/CsNetfilter.py b/systemvm/patches/debian/config/opt/cloud/bin/cs/CsNetfilter.py
index 497c44402ea..97f47f8c059 100755
--- a/systemvm/patches/debian/config/opt/cloud/bin/cs/CsNetfilter.py
+++ b/systemvm/patches/debian/config/opt/cloud/bin/cs/CsNetfilter.py
@@ -35,6 +35,8 @@ class CsChain(object):
         self.last_added = chain
 
     def get(self, table):
+        if table not in self.chain.keys():
+            return {}
         return self.chain[table]
 
     def last(self):