# IP Ranges for Production e-RS environment

**URL:** <https://developer.community.nhs.uk/t/ip-ranges-for-production-e-rs-environment/14429>\
**Category:** e-Referral Service FHIR API\
**Created:** [17 August 2026 11:11 UTC](https://developer.community.nhs.uk/t/ip-ranges-for-production-e-rs-environment/14429 "2026-08-17T11:11:15Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![ankur.mahto](https://avatars.discourse-cdn.com/v4/letter/a/8e7dd6/32.png) [@ankur.mahto](https://developer.community.nhs.uk/u/ankur.mahto)\
**Post date:** [17 August 2026 11:11 UTC](https://developer.community.nhs.uk/t/ip-ranges-for-production-e-rs-environment/14429/1 "2026-08-17T11:11:16Z")

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We have JWKS endpoints that are hosted behind a firewall as per trust requirements, and we are enabling inbound requests for service that require access to it.

Please could you confirm what are the inbound IP ranges we would need to accept for the production environment of e-RS to access these JWKS endpoints? Also, if there is any official documentation that outlines this (as it is outlined for CIS2), please let us know this too.

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**Author:** ![tony.marsh1](https://dub1.discourse-cdn.com/nhsdigitaldeveloper/user_avatar/developer.community.nhs.uk/tony.marsh1/32/855_2.png) [@tony.marsh1](https://developer.community.nhs.uk/u/tony.marsh1)\
**Post date:** [18 August 2026 15:47 UTC](https://developer.community.nhs.uk/t/ip-ranges-for-production-e-rs-environment/14429/2 "2026-08-18T15:47:52Z")

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Resolved outside of forum