Josh Mudge
5 years ago
commit
68db3b59f9
7 changed files with 597 additions and 0 deletions
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# determined-server-setup (dss) |
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determined-server-setup is a script that installs needed utilities/software on servers so you don't need to. |
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# Requirements |
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# Installation |
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You can install it by running: |
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`curl -s "https://git.coolaj86.com/josh/raw/master/dss/setup.sh" | bash` |
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# Usage |
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This script is in the ALPHA stage. Use at your own risk. |
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``` |
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dss --init # Update your server and install server utilities, setup automatic updates and harden SSH. |
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dss --clean # Update the server and cleanup unneeded files and programs. Use with caution. |
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dss --log # Print the system log.` |
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dss --authlog 1 # Print the SSH authentication log. Use 'dss authlog attacks' to show attacks on your SSH server. |
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dss --user USERNAME init # Setup server with server utilities and enable automatic security updates. |
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``` |
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You can run: `dss help` for a list of all commands. |
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# Automatic Updates |
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When prompted to setup automatic updates, hit "yes" and when prompted with a text box, replace all references to "Debian" with the name of your distro. If you're running Ubuntu, you should replace all references of Debian with Ubuntu. |
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1.7.3 Alpha |
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#!/bin/bash |
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# Determined Create User Script v2.0.3 |
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# Written by AJ Oneal -- edited by Joshua Mudge |
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# Exit on any error |
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set -e |
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if [ -z "$(which openssl)" ]; then |
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echo "ERROR: 'openssl' is not found."; |
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echo "Please install openssl. It is used to generate a random password." |
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exit 1 |
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fi |
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if [ -z "$(grep '^PermitRootLogin prohibit-password$' /etc/ssh/sshd_config)" ] && [ -z "$(grep '^PermitRootLogin no$' /etc/ssh/sshd_config)" ] && [ -z "$(grep '^PermitRootLogin without-password$' /etc/ssh/sshd_config)" ]; then |
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echo "SECURITY ERROR: 'PermitRootLogin prohibit-password' is not set in /etc/ssh/sshd_config"; |
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exit 1 |
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fi |
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if [ -z "$(grep '^PasswordAuthentication no$' /etc/ssh/sshd_config)" ]; then |
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echo "SECURITY ERROR: 'PasswordAuthentication no' is not set in /etc/ssh/sshd_config"; |
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exit 1 |
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fi |
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# http://stackoverflow.com/questions/43481923/security-audit-how-to-check-if-ssh-server-asks-for-a-password/43482975#43482975 |
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if [ -n "$(ssh -v -o Batchmode=yes DOES_NOT_EXIST@localhost 2>/dev/null | grep password)" ]; then |
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echo "SECURITY ERROR: 'PasswordAuthentication no' has not taken affect. Try 'sudo service ssh restart'"; |
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exit 1 |
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fi |
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# exit if there are any unbound variables |
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set -u |
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USER=$1 |
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USER=$(basename $USER .pub) |
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# If they try to create root, exit. |
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if test $USER = "root" |
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then |
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echo "You cannot create the root user, it already exists." |
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exit |
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fi |
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# TODO allow optional gecos i.e. create-user.bash bobs.pub 'Bob Smith' |
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# password will be set later in the script |
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#adduser --disabled-password --gecos '' $USER |
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sudo adduser --disabled-login --gecos '' $USER |
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sudo adduser $USER sudo # if sudo is needed |
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# FAIL before getting here via set -e |
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sudo mkdir -p /home/$USER/.ssh |
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sudo chmod 700 /home/$USER/.ssh |
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sudo touch /home/$USER/.ssh/authorized_keys |
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sudo chmod 600 /home/$USER/.ssh/authorized_keys |
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# PRE-REQ: get the user's ssh public key and store it in whoever.pub |
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sudo bash -c "cat $USER.pub >> /home/$USER/.ssh/authorized_keys" |
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sudo chown $USER:$USER /home/$USER |
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sudo chown $USER:$USER -R /home/$USER/.ssh/ |
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PASSWD=$(openssl rand -hex 20) |
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#echo "$PASSWD" | passwd "$USER" --stdin |
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echo "$USER:$PASSWD" | sudo chpasswd |
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#echo "The temporary password for '"$USER"' is '"$PASSWD"'" |
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sudo passwd -d $USER |
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echo "'$USER'" has been added with key-only authentication and a password must be set on first login |
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sudo chage -d 0 $USER |
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# Other Methods as per https://www.howtogeek.com/howto/30184/10-ways-to-generate-a-random-password-from-the-command-line/ |
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# |
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# Linux |
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# date "+%s.%N" | md5sum |
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# |
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# macOS |
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# date "+%s.%N" | md5 |
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#!/bin/bash |
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# determined-server-setup (dss) |
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# Written by Josh Mudge |
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# Ad Mejorem Dei Glorium |
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version=$(curl -s https://git.coolaj86.com/josh/raw/master/dss/VERSION | cat) |
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# Get options from CLI arguments |
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usr=$USER |
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init=0 |
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clean=0 |
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log=0 |
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authlog=0 |
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update=0 |
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mon=0 |
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while [[ $# -gt 0 ]] |
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do |
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key="$1" |
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case $key in |
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--init) |
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init=1 |
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shift # past argument |
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;; |
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--clean) |
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clean=1 |
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shift # past argument |
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;; |
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--log) |
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log=1 |
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shift # past argument |
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;; |
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--authlog) |
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authlog="$2" |
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shift # past argument |
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;; |
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--user) |
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usr="$2" |
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shift # past argument |
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;; |
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--user2) |
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user2="$2" |
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shift # past argument |
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;; |
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--user3) |
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user3="$2" |
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shift # past argument |
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;; |
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--update) |
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update=1 |
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shift # past argument |
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;; |
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--monitor) |
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mon=1 |
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shift # past argument |
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;; |
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--mon-setup) |
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mon=2 |
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shift # past argument |
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;; |
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--email) |
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email=1 |
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shift # past argument |
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;; |
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--logfile) |
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logfile=1 |
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shift # past argument |
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;; |
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blacklist) |
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blacklist="$2" |
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shift # past argument |
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;; |
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-h|help) |
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echo "dss $version" |
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echo "Usage: dss [OPTION]" |
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echo "You can run the following commands:" |
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echo "dss --clean # Update the server and cleanup uneeded files and programs. Use with caution." |
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echo "dss --log # Print the system log." |
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echo "dss --authlog 1 # Print the SSH authentication log. Use 'dss authlog attacks' to show attacks on your SSH server." |
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echo "dss --user USERNAME --init # Setup server with server utilities and enable automatic security updates." |
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exit 1 |
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;; |
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-v|version) |
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echo "dss $version" |
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exit 1 |
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;; |
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*) |
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# unknown option |
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if test -z "${unknown}" |
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then |
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unknown=$1 |
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else |
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echo "dss $version" |
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echo "dss --user USERNAME --init # Setup server with server utilities and enable automatic security updates." |
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exit 1 |
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fi |
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;; |
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esac |
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shift # past argument or value |
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done |
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if test $init = 1 |
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then |
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# Update server |
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sudo apt-get update |
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sudo apt-get upgrade -y |
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# Install server utilities |
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sudo apt-get install -y screen curl nano htop fail2ban rsync man shellcheck git software-properties-common |
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# Prompt user to set up automatic security updates. |
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sudo apt-get install -y unattended-upgrades |
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sudo dpkg-reconfigure -plow unattended-upgrades |
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# Harden ssh |
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if determined-harden-ssh --user $usr |
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then |
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echo "dss" | sudo tee /home/.dssv1.7 |
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else |
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"You cannot create root user and disable root login, that won't work... See 'dss help'" |
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exit |
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fi |
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elif test $log = 1 |
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then |
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sudo cat /var/log/syslog |
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elif test $authlog = 1 |
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then |
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sudo cat /var/log/auth.log |
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elif test $authlog = attacks |
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then |
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sudo cat /var/log/auth.log | grep "Invalid user" |
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sudo cat /var/log/auth.log | grep "Connection closed" |
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exit |
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elif test ! -z $blacklist |
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then |
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echo "Note to self: add blacklist function, empty elif is not allowed in BASH." |
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# Blacklist code |
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elif test $update = 1 |
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then |
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# Update Linux and determined-setup |
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sudo apt-get update |
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sudo apt-get upgrade |
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curl -s "https://git.coolaj86.com/josh/raw/master/dss/setup.sh" | bash |
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elif test $clean = 1 |
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then |
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# Update |
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sudo apt-get update |
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sudo apt-get upgrade |
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# Cleanup |
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sudo apt-get clean |
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sudo apt-get autoremove |
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elif test $mon = 1 |
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then |
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cd /home |
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./sysmon.sh -- email $email |
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elif test $mon = 2 |
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then |
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dss init |
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curl -sO "https://git.coolaj86.com/josh/raw/master/dss/sysmon.sh" |
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sudo mv sysmon.sh /home/.sysmon.sh |
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( sudo crontab -l ; echo "14 1 * * * /bin/bash -c "/home/.sysmon.sh --email $email"" &> "$logfile" ) | sudo crontab - |
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else |
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echo "dss $version" |
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echo "Usage: dss [OPTION]" |
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echo "You can run the following commands:" |
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echo "dss --clean # Update the server and cleanup uneeded files and programs. Use with caution." |
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echo "dss --log # Print the system log." |
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echo "dss --authlog 1 # Print the SSH authentication log. Use 'dss authlog attacks' to show attacks on your SSH server." |
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echo "dss --user USERNAME init # Setup server with server utilities and enable automatic security updates." |
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exit 1 |
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fi |
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#!/bin/bash |
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# Determined SSH Hardening |
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# Written by Josh Mudge |
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# Ad Mejorem Dei Glorium |
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usr=$USER |
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version="v1.4.1 Alpha" |
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#keyserver="" |
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while [[ $# -gt 0 ]] |
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do |
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key="$1" |
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case $key in |
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setup) |
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setup=1 |
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shift # past argument |
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;; |
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--user) |
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usr="$2" |
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shift # past argument |
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;; |
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--user2) |
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user2="$2" |
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shift # past argument |
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;; |
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--user3) |
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user3="$2" |
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shift # past argument |
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;; |
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--user4) |
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user4="$2" |
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shift # past argument |
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;; |
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--user5) |
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user5="$2" |
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shift # past argument |
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;; |
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-h|--help) |
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echo determined-harden-ssh $version |
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echo "Usage: determined-harden-ssh --user USERNAME" |
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exit 1 |
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;; |
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*) |
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# unknown option |
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if [ -z "${user}" ]; then |
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echo determined-harden-ssh $version |
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echo "No admin user specified." |
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echo "Usage: determined-harden-ssh --user USERNAME" |
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else |
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echo "unrecognized option '$1'" |
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exit 1 |
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fi |
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;; |
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esac |
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shift # past argument or value |
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done |
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if test ! -z $usr |
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then |
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echo "Installing fail2ban and hardening SSH configuration." |
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# Install fail2ban |
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sudo apt-get install -y fail2ban curl openssh-server > /dev/null |
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echo "Creating new user by the username $usr" |
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echo "Disabling password based logins in favor of SSH keys." |
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# SSH keys only, no passwords. |
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sudo sed -i "s/PasswordAuthentication yes/PasswordAuthentication no/g" /etc/ssh/sshd_config |
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sudo sed -i "s/#PasswordAuthentication no/PasswordAuthentication no/g" /etc/ssh/sshd_config |
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sudo sed -i "s/PermitRootLogin yes/PermitRootLogin prohibit-password/g" /etc/ssh/sshd_config |
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mkdir .tssh |
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cd .tssh |
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curl -sLO https://git.coolaj86.com/josh/raw/master/dss/create-user.bash |
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curl -sLO https://$keyserver/$usr.pub |
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sudo mv create-user.bash /usr/local/bin/determined-create-user |
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sudo chmod +x /usr/local/bin/determined-create-user |
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if determined-create-user $usr; |
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then |
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echo "Setting up non-root admin user(s)" |
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else |
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echo "User creation failed. Please fix the above error and try again." |
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cd .. |
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rm -rf .tssh |
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exit |
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fi |
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if test ! -z $user2 |
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then |
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curl -sLO https://$keyserver/$user2.pub |
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./create-user.bash $user2 |
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fi |
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if test ! -z $user3 |
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then |
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curl -sLO https://$keyserver/$user3.pub |
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./create-user.bash $user3 |
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fi |
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if test ! -z $user4 |
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then |
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curl -sLO https://$keyserver/$user4.pub |
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./create-user.bash $user4 |
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fi |
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if test ! -z $user5 |
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then |
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curl -sLO https://$keyserver/$user5.pub |
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./create-user.bash $user5 |
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fi |
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cd .. |
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rm -rf .tssh |
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echo "Disabling root login." |
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sudo sed -i "s/PermitRootLogin prohibit-password/PermitRootLogin no/g" /etc/ssh/sshd_config |
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sudo sed -i "s/PermitRootLogin without-password/PermitRootLogin no/g" /etc/ssh/sshd_config |
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echo "That's it, we're done :)" |
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else |
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echo determined-harden-ssh $version |
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echo "No admin user specified." |
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echo "Usage: ./harden-server.sh --user USERNAME" |
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fi |
@ -0,0 +1,22 @@ |
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#!/bin/bash |
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# Setup for determined-server-setup |
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# Written by Josh Mudge |
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# Ad Mejorem Dei Glorium |
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version=$(curl -s https://git.coolaj86.com/josh/raw/master/dss/VERSION | cat) |
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echo "Installing dss $version" |
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curl -sO https://git.coolaj86.com/josh/raw/master/dss/determined-server-setup.sh |
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sudo mv determined-server-setup.sh /usr/local/bin/dss |
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sudo chmod +x /usr/local/bin/dss |
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curl -sO https://git.coolaj86.com/josh/raw/master/dss/harden-server.sh |
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sudo mv harden-server.sh /usr/local/bin/determined-harden-ssh |
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sudo chmod +x /usr/local/bin/determined-harden-ssh |
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echo "Done. Run 'dss' to use." |
@ -0,0 +1,136 @@ |
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#!/bin/bash |
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# Josh's Automatic System Monitor |
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# Written by Josh Mudge |
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# Ad Mejorem Dei Glorium |
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update=1 |
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version=v1.5.1a |
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alpha=0 |
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dfh=$(df -h | grep '8[0-9]%') |
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dfh2=$(df -h | grep '9[0-9]%') |
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while [[ $# -gt 0 ]] |
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do |
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key="$1" |
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case $key in |
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--setup) |
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shift # past argument |
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setup=1 |
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;; |
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--no-update) |
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update=0 |
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|
shift # past argument |
||||
|
;; |
||||
|
--audit) |
||||
|
audit=1 |
||||
|
shift # past argument |
||||
|
;; |
||||
|
--email) |
||||
|
email="$2" |
||||
|
shift # past argument |
||||
|
;; |
||||
|
-h|help) |
||||
|
echo "dss-mon $version" |
||||
|
echo "Usage: dss --monitor --email user@mailprovider.com" |
||||
|
exit 1 |
||||
|
;; |
||||
|
-v|version) |
||||
|
echo "dss $version" |
||||
|
exit 1 |
||||
|
;; |
||||
|
*) |
||||
|
# unknown option |
||||
|
if test -z "${unknown}" |
||||
|
then |
||||
|
unknown=$1 |
||||
|
else |
||||
|
echo "dss-mon $version" |
||||
|
echo "Usage: dss --monitor --email user@mailprovider.com" |
||||
|
exit 1 |
||||
|
fi |
||||
|
;; |
||||
|
esac |
||||
|
shift # past argument or value |
||||
|
done |
||||
|
|
||||
|
if test $update = 1 |
||||
|
then |
||||
|
|
||||
|
sudo apt-get update |
||||
|
sudo apt-get upgrade |
||||
|
sudo apt-get install sysstat # Check if installed, then do this |
||||
|
curl -s "https://git.coolaj86.com/josh/raw/master/dss/setup.sh" | bash |
||||
|
|
||||
|
fi |
||||
|
|
||||
|
# Cleanup |
||||
|
|
||||
|
sudo apt-get clean |
||||
|
|
||||
|
# Security Audit (Tackled by dss init before setting this up.) |
||||
|
|
||||
|
# if test ! -f /home/.dssv1.7 |
||||
|
# then |
||||
|
# |
||||
|
# dss init |
||||
|
# |
||||
|
# fi |
||||
|
|
||||
|
auth=$(sudo cat /var/log/auth.log | grep "Invalid user") |
||||
|
#auth2=$(sudo cat /var/log/auth.log | grep "Connection closed") |
||||
|
|
||||
|
if test $alpha = 1; |
||||
|
then |
||||
|
|
||||
|
sudo apt-get autoremove |
||||
|
|
||||
|
fi |
||||
|
|
||||
|
# To setup email, point a domain name to your server using DNS. |
||||
|
# Disable any firewall rules that block port 25 (You may have to go to a server admin panel or contact your system administrator) |
||||
|
# Then run: sudo apt-get install mailutils |
||||
|
# Open up /etc/hosts and make sure it has: |
||||
|
# 127.0.1.1 mydomain.com myserverHOSTNAME |
||||
|
# Select "Internet Site" and enter the domain you want it to send email from. |
||||
|
# Then you can send email like this: echo "Body of email" | mail -s "subject" EMAILADDRESS |
||||
|
|
||||
|
if test ! -z "$auth" # If set to run automatically, don't run this check every time. |
||||
|
then |
||||
|
echo "Attacks found. Sending authentication log to $email" |
||||
|
sudo cat /var/log/auth.log | grep "Invalid user" | mail -s "Invalid User Login" $email |
||||
|
fi |
||||
|
|
||||
|
if test ! -z "$dfh" |
||||
|
then |
||||
|
echo "Disk usage is high, sending disk usage to $email" |
||||
|
echo "$dfh" | mail -s "High Disk Usage" $email |
||||
|
fi |
||||
|
|
||||
|
if test ! -z "$dfh2" |
||||
|
then |
||||
|
echo "Disk usage is critical, sending disk usage to $email" |
||||
|
echo "$dfh2" | mail -s "Critical Disk Usage" $email |
||||
|
fi |
||||
|
|
||||
|
for i in {1..300} # Do this 300 times. |
||||
|
do |
||||
|
CPU=$(mpstat 1 1 | awk '$3 ~ /CPU/ { for(i=1;i<=NF;i++) { if ($i ~ /%idle/) field=i } } $3 ~ /all/ { printf("%d",100 - $field) }') # Find CPU usage for the last 10 seconds. Code credit: Stackoverflow |
||||
|
CPUT=$(($CPUT + $CPU)) # Add each 1 second record to the total. |
||||
|
done |
||||
|
CPURESULT=$(($CPUT / 300)) # Divide the total by 300 seconds to find average CPU usage over the last 5 minutes. |
||||
|
|
||||
|
|
||||
|
if test $CPURESULT > 90 |
||||
|
then |
||||
|
echo "CPU usage is quite high, sending report to $email" |
||||
|
echo "$CPURESULT %" | mail -s "High CPU Usage" $email |
||||
|
fi |
||||
|
|
||||
|
USEDRAM=$(free | grep Mem | awk '{print ($2 -$7) / $2 * 100.0}') |
||||
|
|
||||
|
if test $USEDRAM > 80 |
||||
|
then |
||||
|
echo "RAM usage is quite high, sending report to $email" |
||||
|
echo "$USEDRAM %" | mail -s "High RAM Usage" $email |
||||
|
fi |
Loading…
Reference in new issue