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:*There are <u>two sets</u> of IPtables rules that apply: '''OUTPUT/INPUT on the client''' and INPUT/OUTPUT on the server.<br>It is important to think about from the perspective from the client as well as the server.
:* Outbound traffic from a server (like a response to the Firefox connecting to web-browser from the web -server) is rarely blocked <u>unless </u> there is a business security policy to <u>prevent </u> some kind of traffic. Even in that case, and even then it's that security policy is usually done performed on a router (that's this is a topic for which will be discussed laterin this course).
* Inbound traffic is of two distinct types, in our diagram we have both:
*# New incoming connections (what you normally think of as inbound traffic): the web server receives a new incoming connection.
