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docs: FIPS certification (#21131) 

* FIPS section

* small updates

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@ -2,7 +2,7 @@
layout: docs
page_title: FIPS 140-2
description: >-
A version of Consul compliant with FIPS 140-2 is available to Enterprise users. Learn about where to find FIPS-compliant versions of Consul, as well as usage restrictions and technical details.
A version of Consul compliant with FIPS 140-2 is available to Enterprise users. Learn about where to find FIPS-compliant versions of Consul, its usage restrictions, technical details, and Leidos validation.
---
# FIPS 140-2
@ -17,7 +17,7 @@ To use this feature, you must have an [active or trial license for Consul Enterp
## Using FIPS 140-2 Consul Enterprise
FIPS 140-2 builds of Consul Enterprise behave in the same way as non-FIPS builds. There are no restrictions on Consul algorithms and ensuring that Consul remains in a FIPS-compliant mode of operation is your responsibility. To maintain FIPS-compliant operation, you must [ensure that TLS is enabled](/consul/tutorials/security/tls-encryption-secure) so that communication is encrypted. Consul products surface some helpful warnings where settings are insecure.
FIPS 140-2 builds of Consul Enterprise behave in the same way as non-FIPS builds. There are no restrictions on Consul algorithms and ensuring that Consul remains in a FIPS-compliant mode of operation is your responsibility. To maintain FIPS-compliant operation, you must [ensure that TLS is enabled](/consul/tutorials/archive/tls-encryption-secure) so that communication is encrypted. Consul products surface some helpful warnings where settings are insecure.
Encryption is disabled in Consul Enterprise by default. As a result, Consul may transmit sensitive control plane information. You must ensure that gossip encryption and mTLS is enabled for all agents when running Consul with FIPS-compliant settings. In addition, be aware that TLS v1.3 does not work with FIPS 140-2, as HKDF is not a certified primitive.
@ -45,6 +45,7 @@ When using Consul Enterprise with FIPS 140-2, be aware of the following operatio
We do not support in-place migrations from non-FIPS builds of Consul to FIPS builds of Consul, regardless of version. A fresh cluster installation is required to support FIPS 140-2. You cannot upgrade directly to a FIPS-compliant build.
#### TLS restrictions
Consul Enterprise's FIPS modifications include restrictions to supported TLS cipher suites and key information. Only the following cipher suites are allowed:
- `TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256`
@ -125,7 +126,21 @@ Similarly, on a FIPS Windows binary, run `go tool nm` on the binary to get a sym
On both Linux and Windows non-FIPS builds, the search output yields no results.
### Compliance validation
## Leidos validation
A Lab, authorized by the U.S. Government to certify FIPS 140-2 compliance, is in the process of verifying that Consul Enterprise and its related packages are compliant with the requirements of FIPS 140-2 Level 1.
In 2024, Leidos certified the integration of FIPS 140-2 cryptographic module [BoringCrypto Cert. #4407](https://csrc.nist.gov/Projects/Cryptographic-Module-Validation-Program/Certificate/4407) for the following Consul releases:
- Consul Enterprise builds:
- [`consul_1.16.0+ent.fips1402`](https://releases.hashicorp.com/consul/1.16.0+ent.fips1402/)
- [`consul_1.16.1+ent.fips1402`](https://releases.hashicorp.com/consul/1.16.1+ent.fips1402/)
- Consul Dataplane builds:
- [`consul-dataplane_1.2.0+fips1402`](https://releases.hashicorp.com/consul-dataplane/1.2.0+fips1402/)
- [`consul-dataplane_1.2.1+fips1402`](https://releases.hashicorp.com/consul-dataplane/1.2.1+fips1402/)
- Consul K8s builds:
- [`consul-k8s_1.2.0+fips1402`](https://releases.hashicorp.com/consul-k8s/1.2.0+fips1402/)
- [`consul-k8s_1.2.1+fips1402`](https://releases.hashicorp.com/consul-k8s/1.2.1+fips1402/)
- Consul K8s Control Plane builds:
- [`consul-k8s-control-plane_1.2.0+fips1402`](https://releases.hashicorp.com/consul-k8s-control-plane/1.2.0+fips1402/)
- [`consul-k8s-control-plane_1.2.1+fips1402`](https://releases.hashicorp.com/consul-k8s-control-plane/1.2.2+fips1402/)
For more information about verified platform architectures and confirmed feature support, [review the Leidos certification letter](https://www.datocms-assets.com/2885/1715791547-boringcrypto_compliance_letter_signed.pdf).