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sudo apt-get install openvas

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sudo openvas-setup

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sudo openvas-start

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sudo apt-get install nmap

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sudo nmap -p 1-65535 -T4 -A -v <target>

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sudo apt-get update
sudo apt-get upgrade

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sudo iptables -L

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sudo iptables -A INPUT -i eth0 -p tcp --dport 22 -m state --state NEW,ESTABLISHED -j ACCEPT
sudo iptables -A OUTPUT -o eth0 -p tcp --sport 22 -m state --state ESTABLISHED -j ACCEPT
sudo iptables -A INPUT -i eth0 -p tcp --dport 80 -m state --state NEW,ESTABLISHED -j ACCEPT
sudo iptables -A OUTPUT -o eth0 -p tcp --sport 80 -m state --state ESTABLISHED -j ACCEPT
sudo iptables -A INPUT -i eth0 -j DROP

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sudo systemctl list-unit-files --type=service | grep enabled

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sudo systemctl disable <service>

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sudo nano /etc/pam.d/common-password

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password        requisite                       pam_pwquality.so retry=3
password        sufficient                      pam_unix.so obscure sha512

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sudo tail -f /var/log/syslog

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