Harden Linux systems with SSH, firewall, filesystem, patching, and auditing controls.
npx skills add https://github.com/prapanch/agent-coda --skill os-hardening
Please help me install this Agent Skill. Skill: os-hardening Source: https://github.com/prapanch/agent-coda/tree/main/sysadmin/os-hardening Command: npx skills add https://github.com/prapanch/agent-coda --skill os-hardening
This Skill reduces the attack surface of a Linux system by disabling what is unnecessary, tightening permissions, and enforcing safer defaults that mitigate common intrusion paths.
Use the os-hardening skill to produce a hardened baseline plan for a new Ubuntu/Debian server by applying SSH, firewall, filesystem, patching, and auditing recommendations.
High-intent search queries and answers about installing and using this skill.
To harden SSH on a Linux server, disable root login, enforce key-only authentication, and apply user allowlists. This reduces unauthorized access paths before safely exposing systems to the internet.
A Linux OS hardening baseline includes tightening authentication, reducing network exposure with default-deny firewall rules, restricting filesystem permissions, enabling automated patching, and configuring auditd for incident response monitoring.
Configuring auditd for incident response involves enabling system auditing, logging privileged actions, and supporting integrity monitoring to detect unexpected file changes. This provides necessary visibility after remediation from scan findings.
Yes, this server security hardening approach applies to Ubuntu and Debian systems. It produces a hardened baseline plan by applying SSH, firewall, filesystem, patching, and auditing recommendations tailored for those environments.
The best way to restrict network exposure is by removing unnecessary listening services, applying default-deny firewall rules, and restricting internal services to localhost. This minimizes external attack vectors on exposed servers.
Securing risky mount points during filesystem hardening involves locking down sensitive files and restricting execution privileges in directories like /tmp. This prevents malicious scripts from running on the server.
AlteriomEnforce key-based authentication, server hardening, and jump-host access for SSH.
williamzujkowskiValidate CIS benchmarks against Linux or Windows hosts to identify OS hardening gaps.
balsm-healthDetect container escape attempts via eBPF syscall monitoring and audit logging.
NickCrewEnforce Kubernetes security policies across clusters and namespaces.
