Topic starter
06/07/2026 9:36 am
TL;DR: Long-lived AWS access keys without IP restrictions can function as world-readable credentials, letting attackers exfiltrate data or alter monitoring from anywhere, according to Token Security. The real governance problem is not just exposure but the assumption that persistent NHI access remains safe until someone remembers to rotate it.
Editorial analysis by NHI Mgmt Group, based on content published by Token Security: “IP Hardening in the Real World: A Story from the Trenches”.
Key questions
Q: What breaks when a long-lived AWS access key has no IP restrictions?
A: A leaked or copied key becomes usable from any network, which removes one of the few practical barriers between exposure and abuse.
Q: Why do old NHI keys with broad permissions create more risk than fresh ones?
A: Age increases the time available for accidental exposure, unnoticed reuse, and post-compromise exploitation.
Q: How do security teams know whether IP hardening is actually working for NHIs?
A: Look for two signals: whether high-risk credentials are restricted to approved origins, and whether blocked or suspicious origin attempts are being detected and investigated.
Practitioner guidance
- Map every persistent AWS key to a named owner Require an accountable business or technical owner for each long-lived access key, and retire any credential that cannot be traced to a current automation or service need.
- Add IP and VPC endpoint restrictions to standing keys Lock high-value NHIs to approved corporate IP ranges or VPN origins, and pair that with VPC endpoint policies where AWS access should never come from the public internet.
- Prioritise old keys with broad S3 and CloudWatch access Start review with credentials older than the current rotation standard and those that can read, delete, or modify monitoring data, because those are the fastest paths to impact.
Bottom line: The article shows that a long-lived AWS access key without IP restrictions can be far easier to abuse than its legitimate use case suggests.
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06/07/2026 9:50 am
IP hardening is a governance control, not just a network filter: the article shows that a long-lived NHI key becomes materially less dangerous when its use is bound to approved origins. That is because the control limits where a bearer-style secret can be exercised, which changes the practical abuse model even before rotation happens. For IAM teams, the implication is that network context belongs inside the access decision, not outside it.
A few things that frame the scale:
- NHIs outnumber human identities by 25x to 50x in modern enterprises, according to the Ultimate Guide to NHIs.
A question worth separating out:
Q: How should teams respond when a long-lived access key belongs to a former employee?
A: Treat it as a lifecycle failure, not just a secret management issue. Confirm whether the credential still supports a live workload, assign current ownership, narrow its scope, and remove it if the organisation cannot defend why it still exists.
👉 Read our full editorial: IP hardening exposes the real risk of long-lived NHI keys