Help updating, not working

I'm having major issues get my Astaro/Sophos boxes to update.

I need to know how to do this manually as our company's main parameter firewall I think is blocking access to the outside world.
I have boxes that are still running earlier versions of 7 but most are v8. I need to upgrade them all to 8.308 and eventually v9.

Can you assist me in configuring my boxes for manual updates.
I tried to use the tgz.gpg files in up2date manual upload.