Secure you Debian Server

This guide contain the steps i always do on first time login after installing Debian on a blank server.

• You need root access for the first steps, so gain root access as secure as you possibly can.

Update Debian

This is a good idea to do before anything else.

Using the -y switch on apt-get will assume "yes" to all questions from apt-get.

root@pulspc:~# apt-get -y update
Ign http://ftp.debian.org jessie InRelease
Get:1 http://ftp.debian.org jessie-updates InRelease [145 kB]
Get:2 http://ftp.debian.org jessie Release.gpg [2,373 B]
Get:3 http://ftp.debian.org jessie Release [148 kB]
Get:4 http://ftp.debian.org jessie-updates/main Sources [15.4 kB]
Get:5 http://ftp.debian.org jessie-updates/main amd64 Packages/DiffIndex [6,916 B]
Get:6 http://security.debian.org jessie/updates InRelease [63.1 kB]
Get:7 http://ftp.debian.org jessie-updates/main Translation-en/DiffIndex [2,704 B]
Get:8 http://ftp.debian.org jessie/main Sources [7,056 kB]
Get:9 http://ftp.debian.org jessie/main amd64 Packages [6,776 kB]
Get:10 http://security.debian.org jessie/updates/main Sources [188 kB]
Get:11 http://ftp.debian.org jessie/main Translation-en [4,582 kB]
Get:12 http://security.debian.org jessie/updates/main amd64 Packages [346 kB]
Get:13 http://ftp.debian.org jessie-updates/main amd64 2016-11-07-2025.04.pdiff [531 B]
Get:14 http://ftp.debian.org jessie-updates/main amd64 2016-11-30-2028.41.pdiff [530 B]
Get:15 http://ftp.debian.org jessie-updates/main amd64 2016-11-30-2028.41.pdiff [530 B]
Get:16 http://security.debian.org jessie/updates/main Translation-en [183 kB]
Fetched 19.5 MB in 7s (2,674 kB/s)
Reading package lists... Done
root@pulspc:~#

Make SSH Access more secure

Brute force SSH Login Protection

Inspiration was found at http://www.linode.com/docs/security/securing-your-server/