Hard Firewall-Rule
Blocks only non TelstraClear Content Servers, does not block http file system

Here is a quick run through of how to only use the TelstraClear Steam Content Server using a Firewall rule. These steps are translatable to various operating systems, (including OS X) which include an inbuilt firewall. Be aware, this will not block Steam's http file system, the titles of which are not available on the TelstraClear Steam Content Server.

Has there been a change in this? Since the start of the year I have used the Firewall rule and it's worked for pretty much any game I've downloaded (with a few exceptions where I simply turn it off and go back to using metered servers). I've been away for the past 2 months and when I came back a couple of days ago I began to download a number of new games I'd purchased while I was away. Today I double checked my usage and it would appear as though all the content that I had downloaded had been metered :/ There goes 75% of my monthly usage...

Is this because the games I've been downloading are being delivered with the http system? If so, does that mean in future I should be using the Steam-Limiter?
Cheers.