cyberstrikeus CIS Ubuntu Linux 16.04 LTS Benchmark v2.0.0 - Control 3.5.3.1.2
Profile
- Level: Level 1 - Server, Level 1 - Workstation
- Assessment Status: Automated
Description
nftables is a subsystem of the Linux kernel providing filtering and classification of network packets/datagrams/frames and is the successor to iptables.
Rationale
Running both iptables and nftables may lead to conflict.
Audit Procedure
Command Line
Run the following command to verify that nftables is not installed:
dpkg -s nftables
Expected Result
dpkg-query: package 'nftables' is not installed
Remediation
Command Line
Run the following command to remove nftables:
apt purge nftables
References
None
CIS Controls
Version 7
9.4 Apply Host-based Firewalls or Port Filtering - Apply host-based firewalls or port filtering tools on end systems, with a default-deny rule that drops all traffic except those services and ports that are explicitly allowed.