I've just installed the Debian ech AMD 64 Version on a computer, which should be a server in the near future.
These are my first serious steps with Linux, I have never set up such a system before, just worked with a postgresql database and setting up some cronjobs.
So, I know that this will be a long way with a lot of learning. To secure the system, I want to follow the steps described under the following URL:
But I want to do this over a putty connection. Unfortunetly, and now some you will be amused since I'm on my way of setting up a server, I can't get a connection from and to the machine. During the installation I thought there was a connection, for example to download the release file. What happened? Is something blocking some ports? If so, what do I have to do to be able to connect via putty and to be able to download some files with apt-get?
Thanks for any help,