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macOS post-exploitation for credential harvesting, DTrace monitoring, TCC bypass, and stealth operations via native tools
Windows userland post-exploitation for credential harvesting, monitoring, AMSI/ETW bypass, and stealth operations
Kubernetes post-exploitation for container escape, secret extraction, RBAC abuse, and cluster persistence
Based on SOC occupation classification
Showing SKILL.md
| name | cis-ubuntu2004-v300-4-4-1-2 |
| description | Ensure nftables is not in use with iptables |
| category | cis-networking |
| version | 3.0.0 |
| author | cyberstrike-official |
| tags | ["cis","ubuntu","linux","ubuntu-20.04","firewall","iptables"] |
| cis_id | 4.4.1.2 |
| cis_benchmark | CIS Ubuntu Linux 20.04 LTS Benchmark v3.0.0 |
| tech_stack | ["ubuntu","linux"] |
| cwe_ids | [] |
| chains_with | [] |
| prerequisites | [] |
| severity_boost | {} |
nftables is a subsystem of the Linux kernel providing filtering and classification of network packets/datagrams/frames and is the successor to iptables.
Running both iptables and nftables may lead to conflict.
Run the following commend to verify that nftables is not installed:
dpkg-query -s nftables &>/dev/null && echo "nftables is installed"
Nothing should be returned
nftables.service is not enabled:systemctl is-enabled nftables.service 2>/dev/null | grep '^enabled'
Nothing should be returned
Run the following command to verify nftables.service is not active:
systemctl is-active nftables.service 2>/dev/null | grep '^active'
Nothing should be returned
No output from any of the above commands.
Run the following command to remove nftables:
apt purge nftables
nftables.service:systemctl stop nftables.service
systemctl mask nftables.service
Not applicable.
v8 - 4.4 Implement and Manage a Firewall on Servers v8 - 4.5 Implement and Manage a Firewall on End-User Devices v7 - 9.4 Apply Host-based Firewalls or Port Filtering
MITRE ATT&CK Mappings: T1562, T1562.004 | TA0011