Most breaches don't come from sophisticated, movie-style hacking. They come from boring, preventable gaps — an unpatched server, a default password, an exposed port. The good news: closing those gaps doesn't require an enterprise security team. It requires discipline and a checklist.
Here's the high-impact baseline we apply to every server we manage.
1. Lock down access
- Disable password-based SSH in favour of key-based authentication.
- Enforce multi-factor authentication on every admin account.
- Apply least privilege — give each user and service only the access it needs.
- Remove unused accounts and rotate credentials regularly.
2. Reduce the attack surface
- Close every port you don't need. Each open port is a door; lock the ones nobody should use.
- Disable unused services and remove software you don't run.
- Put a firewall in front of everything, allowing only known, necessary traffic.
3. Patch relentlessly
- Keep the OS, runtimes, and packages current. Unpatched known vulnerabilities are the single most common breach vector.
- Test patches in staging, then roll them out during low-traffic windows.
- Automate where possible so nothing critical lingers unpatched.
4. Manage secrets properly
- No passwords or API keys in code or config files. Use a secrets manager.
- Encrypt sensitive data at rest and in transit.
- Scope and rotate keys, and revoke anything that may have been exposed.
5. Build security into the pipeline
- Scan dependencies for known vulnerabilities on every build.
- Run static analysis (SAST) to catch insecure code before it ships.
- Scan container images so you're not deploying known-bad layers.
6. Back up — and test the restore
- Automate encrypted backups on a schedule.
- Actually test restores. A backup you've never restored from is a hope, not a plan.
- Keep an off-site copy so a single failure can't take out both your system and its backup.
7. Watch for trouble
- Monitor security signals and unusual activity.
- Centralise logs so you can investigate quickly.
- Have a response plan ready before you need it.
The 80/20 of security
You'll notice none of this is exotic. That's the point: the majority of real-world risk is closed by doing the fundamentals consistently. The hard part isn't knowing the list — it's keeping it true across every server, every week, as your systems change.
That's where managed DevSecOps earns its keep. If you'd like a plain-language read on where your current posture stands, our free audit includes a security review with prioritised, no-jargon recommendations.