Mar 2017
IPTables is used in Linux to protect unauthorised access to the OS, however during setup it might be an idea to disable it (temporarily) if you are unable to see certain IP Streams.
IPTables is a massivly complex topic, and I don't know that much about it, but what I do know is how to stop and start it.
service iptables status
service iptables stop
service iptables start