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4.4.1.1 Ensure iptables packages are installed

Audit#

Run the following command to verify that iptables is installed: 

# dpkg-query -s iptables &>/dev/null && echo "iptables is installed"
iptables is installed

Run the following command to verify that iptables-persistent is installed: 

# dpkg-query -s iptables-persistent &>/dev/null && echo "iptables-persistent is installed"
iptables-persistent is installed

Remediation#

Run the following command to install iptables and iptables-persistent 

# apt install iptables iptables-persistent