Hello,
Thank you for contacting us! The issue you are experiencing with iptables is happening due to our paravirt kernel having a "security" chain compiled into it, and the default "iptables" init script included with CentOS does not know how to handle it. You are able to resolve this issue by downloading an amended version of the "iptables" init script. Please issue the following commands as the "root" user:
cd /etc/init.d
mv iptables ~/iptables.bak
wget
http://epoxie.net/12023.txt && cat 12023.txt | tr -d '\r' > iptables
chmod +x iptables
rm -rf 12023.txt
Now, "iptables" should now start successfully:
service iptables restart
If there is anything else we can do for you, please let us know.
Regards,