Menu
The review-first prompt is selected by default. You can switch to a direct command or download a local copy.
Read SKILL.md and any companion files shown by SkillsMP before deciding whether to install.
Install with Codex or Claude Copy this prompt, paste it into Codex, Claude, or another assistant, and let it review the skill page and install it for you.
A direct command skips the review prompt. Inspect the source before running it.
npx skills add https://github.com/CyberStrikeus/CyberStrike --skill cis-ubuntu2004-v300-2-1-3The command stays on one line. Scroll horizontally to inspect it before copying.
Prefer a local copy? Download the files currently available to SkillsMP.
Showing SKILL.md
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
| name | cis-ubuntu2004-v300-2-1-3 |
| description | Ensure dhcp server services are not in use |
| category | cis-networking |
| version | 3.0.0 |
| author | cyberstrike-official |
| tags | ["cis","ubuntu","linux","ubuntu-20.04","services"] |
| cis_id | 2.1.3 |
| cis_benchmark | CIS Ubuntu Linux 20.04 LTS Benchmark v3.0.0 |
| tech_stack | ["ubuntu","linux"] |
| cwe_ids | [] |
| chains_with | [] |
| prerequisites | [] |
| severity_boost | {} |
Dynamic Host Configuration Protocol (DHCP) is a service that allows machines to be automatically assigned IP addresses, reducing the administration burden of manually assigning IP addresses to all devices on a network.
Unless a system is specifically set up to act as a DHCP server, it is recommended that the dhcp server service be disabled to reduce the potential attack surface.
Run the following command to verify isc-dhcp-server is not installed:
# dpkg-query -W -f='${binary:Package}\t${Status}\t${db:Status-Status}\n' isc-dhcp-server
If installed, run:
# systemctl is-enabled isc-dhcp-server.service isc-dhcp-server6.service
# systemctl is-active isc-dhcp-server.service isc-dhcp-server6.service
Verify the services are not enabled and not active.
isc-dhcp-server should not be installed, or if installed, the services should be stopped and masked.
Run the following commands to stop, mask, and purge isc-dhcp-server:
# systemctl stop isc-dhcp-server.service isc-dhcp-server6.service
# systemctl mask isc-dhcp-server.service isc-dhcp-server6.service
# apt purge isc-dhcp-server
isc-dhcp-server is not installed by default.
| Controls Version | Control | IG 1 | IG 2 | IG 3 |
|---|---|---|---|---|
| v8 | 4.8 Uninstall or Disable Unnecessary Services on Enterprise Assets and Software | x | x | |
| v7 | 9.2 Ensure Only Approved Ports, Protocols and Services Are Running | x | x |
MITRE ATT&CK Mappings: T1203, T1210, T1543, T1543.002 | TA0008 | M1042