Security hardening a bank can hand to an auditor.
How Crafty Penguins brought a US commercial bank's enterprise Linux fleet to a documented, high-90s compliance score against a leading industry framework, server by server, control by control.
A Linux fleet. A compliance framework.
No
shortcuts.
A US commercial bank, founded over 100 years ago and still serving customers today, needed to bring its enterprise Linux fleet into alignment with a leading industry security framework. The kind of hardening a security team can point to during an audit and defend, control by control, with documentation.
Not a scan. Not a report with a stack of red rows. An actual remediation engagement, where every finding gets evaluated, every decision gets a documented reason, and every server ends up at a known-good baseline the bank's security leadership can stand behind.
- 01 Bring every server in the fleet to a measurable, framework-aligned security baseline.
- 02 Handle each finding with a clear decision: remediate, or document the exclusion with a defensible reason.
- 03 Deliver work that holds up under audit, with per-server documentation the compliance team can use.
Assess. Remediate. Document.
Repeat until
done.
We worked through the fleet server by server, control by control. For each finding, we followed a repeatable SOP: evaluate the control, decide whether to remediate or document an exclusion, and communicate the reasoning back to the bank's security leadership. Nothing was skipped. Nothing was left unexplained.
Alongside the systematic remediation, we tackled the disciplines that always come up in this kind of engagement. User audits and root access review. Sudo process improvements. Cryptographic modernization, removing deprecated host keys, migrating to modern equivalents. The kinds of changes that quietly close the doors a compliance framework is trying to close.
All of it coordinated with the change management discipline a regulated banking environment requires, scheduled, reviewed, tracked, and documented.
Line-by-line control remediation
Every control evaluated, every remediation implemented, every exclusion documented, with a formal security assessment report per server.
A repeatable evaluation SOP
A defined process for handling every finding, remediate vs. document exclusion, with reasoning communicated back to security leadership.
Access & privilege hardening
User audits, root access reviews, and sudo process improvements, closing the everyday doors that ordinary hardening scans miss.
Cryptographic modernization
Removed deprecated host key algorithms, migrated to modern equivalents, bringing the cryptographic surface up to current standards.
Coordinated change management, regulated-environment appropriate
Every change scheduled, reviewed, tracked, and documented to the standards a regulated banking environment requires. No cowboy patches. No surprise reboots. Just disciplined, defensible work.
Framework-aligned
Formally delivered
For every finding
Documentation complete
A fleet the bank could
defend,
control by control.
The bank's Linux fleet reached a high-90s compliance score against the industry framework it was hardened to, with every server documented, every remediation logged, and every exclusion accompanied by a defensible reason. Not just a higher score, but a defensible one.
When the security team is asked to demonstrate the state of the environment, internally, to auditors, or to any other reviewer, they have the paperwork to do it. Per server. Per control. In the form and language a compliance team actually uses.
That's the difference between "we ran a hardening pass" and "we hardened the fleet to a standard we can defend." The bank has the second one.
Working with similar organizations
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Crafty Penguins delivers systematic security hardening for regulated environments, assessed, remediated, and documented to the standard your compliance team actually needs.