IDM Notification Summary

System Impacted:

CMS IDM

Environment:

TEST/IMPL/PROD

Outage (Yes/No):

No

Business Impact:

IDM

Technical Impact:

None expected

Impacted Services

None

Date:

11/3/2025

Summary:

For applications connecting to:

test.idp.idm.cms.gov

impl.idp.idm.cms.gov

idm.cms.gov

Okta will begin to enable support for Internet Protocol Version 6 (IPv6) starting in November 2025. This rollout will continue until IPv6 is available everywhere.

Okta is making this change to ensure the platform is ready for a growing number of devices and networks that rely on IPv6.

This notice is for general awareness in the unlikely event a problem arises due to this change.

For additional information about Okta’s IPv6 enablement, please reference Okta’s support site at: https://support.okta.com/help/s/article/upcoming-ipv6-enablement-for-the-okta-cdn?language=en_US

Documentation about Okta IP Addresses can be found at:

https://help.okta.com/en-us/content/topics/security/ip-address-allow-listing.htm#Implementation%20Details

CMS SLACK CHANNEL:

There is a public slack channel dedicated to providing a forum for questions/issues/information related to okta configuration updates. If you are not a member of this slack channel, please add yourself to #idm-okta-communications

General IDM System Information

For more information related to services hosted in IDM refer to the confluence link below:

https://confluenceent.cms.gov/pages/viewpage.action?pageId=177345583

Escalation

For more information, please reach out to the IDM Okta Team directly via email: 

CMS-IDM-OIE-Team@cms.hhs.gov and

cms.idm.oie.admins@banasolutions.com