Linux Server Exposure Checklist

Start With The Basics

• Do you know which ports are exposed to the internet?
• Do you know which services are supposed to be listening?
• Are password logins disabled where SSH keys should be required?
• Are unused users, old keys, and stale admin accounts removed?
• Is the system patched recently enough for its role?

Access And Authentication

Most exposed hosts get constant authentication pressure. The goal is not to panic over every failed login. The goal is to know what normal looks like and notice when pressure, timing, or source patterns change.

• Review SSH configuration and allowed users.
• Remove unused local accounts and old deployment keys.
• Check whether privileged commands require intentional approval.
• Confirm backups and control panels do not share weak credentials.

Services And Packages

A small VPS often accumulates experiments: old dashboards, forgotten app servers, temporary database listeners, and package repositories that no one remembers adding.

• List listening services and match each one to a real need.
• Remove abandoned software and disabled experiments.
• Review third-party package repositories and signing keys.
• Confirm web servers and reverse proxies are still routing intentionally.

Logs, Backups, And Recovery

Security visibility is only useful if you can reconstruct what changed and recover the host without guessing.

• Confirm authentication, web, service, and package logs are retained long enough.
• Know where app logs live and whether sensitive fields are written there.
• Test backup restore paths before you need them.
• Keep an incident note template ready so decisions are recorded while fresh.

Where Vexyl Guard Fits

Vexyl Guard does not replace patching, firewalls, backups, or access control. It starts in monitor mode so operators can build a local baseline and review suspicious host activity without handing control to a heavy platform.