Just after you click on "Updates and Upgrades", perform the following in the shell:
Code:
# netstat -tulpen | grep 8447
You should see an output like this:
Code:
tcp6 0 0 :::8447 :::* LISTEN 0 112521189 9030/autoinstaller
If you see that then this means the installer is listening on port 8447, so the installer is basically working.
Next, check your firewall configuration, do you allow access to port 8447?
If unsure, post the output of:
or
(if you use firewalld)