Most of those aren't Steam servers and you are missing one or two. Most importantly is:
218.100.43.26
which appears to be getting tons of content uploaded to it recently.
That's not even the full list of unmetered IP addresses from Internode's list.
These are the IP addresses I have whitelisted:
Code:
150.101.120.97 //Internode
150.101.135.1 //Internode
180.92.199.88* //Vocus? Who is this filtered to?
202.72.191.174* //Old 3FL? Can be removed?
202.136.99.185* //Adam?
203.39.198.167* //Bigpond
203.39.198.168 //Bigpond
203.59.140.194* //3FL WA?
203.217.23.193 //3FL NSW
218.100.43.26 //WAIX
The asterisked servers are Australian but they are filtered for use by people on specific ISPs, eg Bigpond or iiNet, so they aren't strictly needed.