I won’t say which ones, but BT have taken it upon themselves to prevent access to some web sites urls.
There is a way round this using a proxy service called Tor, I’ll show how for Xubuntu. Tor also offers benefits of more anonymised browsing on the interweb.
First off, add the Tor ppa to your sources, open a terminal and:
sudo nano /etc/apt/sources.list
deb http://deb.torproject.org/torproject.org precise main
to the bottom of the file (replace “precise” with your distribution version)
Staying at the command line add the gpg key:
gpg --keyserver keys.gnupg.net --recv 886DDD89
gpg –export A3C4F0F979CAA22CDBA8F512EE8CBC9E886DDD89 | sudo apt-key add –
sudo apt-get update
If error free you can then add tor:
sudo apt-get install tor
then install polipo
sudo apt-get install polipo
Make sure the services are started (from now on tor and polipo should run on boot):
sudo /etc/init.d/tor start
sudo /etc/init.d/polipo start
Check tor is running on port 9050
ss -aln | grep 9050
You should see something like this:
LISTEN 0 128 127.0.0.1:9050 *:*
I use Firefox, so now to add some settings to enable the proxy:
Edit > Preferences > Advanced > Network > Connection > Settings
Tick the Manual Proxy Configuration radio button
Add 127.0.0.1 to the SOCKS Host line and change the port to 9050, then OK.
Finally, because Tor can be a bit slow, you may only need it for sites BT is blocking, so fetch the Toggle Proxy add-on which will add a toggle button between manual and system to your add-on bar (or you can set keyboard shortcuts)
If all went well, you should now be able to browse more securely and freely using tor 🙂
You can also add your tor configuration as a relay to support the anonymised tor network, making things faster for you and others.