BAC-L3-SEC-104Blockchain security
Node and validator hardening
Reducing the exposed surface of a machine that holds signing keys and must stay reachable by its peers.
- Level
- L3 — Infrastructure engineer
- Duration
- 3 h
- Track
- Blockchain security
- Maintainer
- Blockchain Security Engineer
Learning objectives
- 01Reduce a node's network and system surface
- 02Separate sentry nodes from the validator node
- 03Verify hardening through an automated check
Guided lab
Deploy a sentry architecture and demonstrate the validator stays directly unreachable.
Independent lab
Write an automated hardening check and run it across the cohort's fleet.
Security angle
Scan your own infrastructure from outside and document everything that answers.
Assessment
Hardening check passing against a peer's infrastructure.