BlackShield Research

Hardening guides for infrastructure that actually exists.

Evergreen defensive playbooks with reasoning, curated snippets, validation checks, and rollback notes.

Hardening guides

Prescriptive playbooks with reasoning, snippets, validation checks, and rollback notes.

Showing 1-4 of 4

Hardening guide8 min read25 min implementation

Linux SSH hardening baseline that does not lock you out

A practical OpenSSH baseline for reducing password, root-login, forwarding, and brute-force risk while keeping a tested rollback path.

LinuxOpenSSHintermediate
Hardening guide8 min read30 min implementation

AWS S3 exposure baseline for public access and recovery

A compact S3 baseline for account-level public access blocking, bucket recovery controls, and evidence that the setting is really applied.

Object storageAWSintermediate
Security Hardening Guides | BlackShield Research