CIS Ubuntu 20.04 Level 2 Workstation Benchmark
Rules and Groups employed by this XCCDF Profile
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Ensure Base Chains Exist for Nftables
Tables in nftables hold chains. Each table only has one address family and only applies to packets of this family. Tables can have one of six famil...Rule Medium Severity -
Set nftables Configuration for Loopback Traffic
Configure the loopback interface to accept traffic. Configure all other interfaces to deny traffic to the loopback network.Rule Medium Severity -
Ensure a Table Exists for Nftables
Tables in nftables hold chains. Each table only has one address family and only applies to packets of this family. Tables can have one of six famil...Rule Medium Severity -
Uncomplicated Firewall (ufw)
The Linux kernel in Ubuntu provides a packet filtering system called netfilter, and the traditional interface for manipulating netfilter are the ip...Group -
Install ufw Package
Theufw
package can be installed with the following command:$ apt-get install ufw
Rule Medium Severity -
Remove ufw Package
Theufw
package can be removed with the following command:$ apt-get remove ufw
Rule Medium Severity -
Verify ufw Enabled
Theufw
service can be enabled with the following command:$ sudo systemctl enable ufw.service
Rule Medium Severity -
Ensure ufw Default Deny Firewall Policy
A default deny policy on connections ensures that any unconfigured network usage will be rejected. Note: Any port or protocol without a explicit a...Rule Medium Severity -
Set UFW Loopback Traffic
Configure the loopback interface to accept traffic. Configure all other interfaces to deny traffic to the loopback network.Rule Medium Severity -
Uncommon Network Protocols
The system includes support for several network protocols which are not commonly used. Although security vulnerabilities in kernel networking code ...Group
Node 2
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Modules