Scheduled - During this maintenance window we will upgrade The Things Stack Cloud to v3.15.0.

We expect brief downtime of the storage integration. For other components we do not expect noticeable downtime.

Here is the changelog since the current version 3.14.2:

### Added

- RPC to query supported PHY versions for a given Band ID.
- Non-TLS LNS endpoint support.
- New config option `is.user-login.disable-credentials-login` that disables login with credentials (can be set per tenant).
- In case where only one authentication provider is configured and the config option is set to `true` the login screen redirects to provider login.

### Changed

- Update to Go 1.17.
- LBS timestamp rollover threshold.
- The Application Server worker pools may now drop workers if they are idle for too long.
- Improved error page UX in the Console.

### Fixed

- Collaborator ID validation in gateway claiming form in the Console.
- Entity purge handling for non-admin users in the Console.
- URL field validation in webhook forms in the Console when value is not trimmed.
- Not rendering site header and footer for error pages in some situations.
- Not providing a copy button for error pages in some situations.
- Improved errors for invalid URLs.
- Limit length of search queries within tables in the Console to 50 to comply with API validation.
- External Join Server address handling in end device creation form in the Console.
- Updating `supports_class_b` field in the end device general settings page in the Console.
Sep 17, 13:46 CEST

Scheduled - We are planning to switch The Things Stack Cloud TLS endpoints to ISRG Root X1 based certificates on the 30 Aug 2021.
If you are using LoRa Basics Station or MQTT based gateways (with TLS), please check if the following case(s) are applicable to you and take action if necessary.

LoRa Basics Station
--------------------
Case 1: You are using only The Things Indoor Gateways: No action needed.
Case 2: Your gateways are configured with the Global Gateway Configuration Service (gateways.cloud.thethings.industries) as the CUPS server: No action needed.
Case 3: Your gateways support multiple Root CAs and one of Root CAs that you have configured is the Lets Encrypt ISRG X1: No action needed.
Case 4: Your gateways support only a single Root CA and is configured with the Lets Encrypt ISRG X1 Root: No action needed.
Case 5: Your gateways support only a single Root CA and is configured with the "Lets Encrypt DST Root CA X3": Action required.
- Your gateways need to be updated to use Lets Encrypt ISRG X1 Root before the 30th Aug 2021.
- Your action involves switching the `cupsTrust` parameter (or `lnsTrust` if using LNS only mode) to Lets Encrypt ISRG X1 Root CA and reconnecting your gateway.
- You can download the ISRG Root X1 CA from this link in our documentation; https://www.thethingsindustries.com/docs/reference/root-certificates/#isrg-root-x1

MQTT
------
Case 1: You are using The Things Kickstarter Gateways: No action needed.
Case 2: Your gateways are connected to the non-TLS ports 1881 or 1882 of The Things Stack Cloud: No action needed.
Case 3: Your gateways are connected to the TLS ports 8881/8882 and support multiple Root CAs. One of Root CAs that you have configured is the Lets Encrypt ISRG X1: No action needed.
Case 4: Your gateways are connected to the TLS ports 8881/8882 and support a single Root CAs. Lets Encrypt ISRG X1 is the single root CA: No action needed.
Case 5: Your gateways are connected to the TLS ports 8881/8882 and support a single Root CAs. "Lets Encrypt DST Root CA X3" is the single root CA that you are currently using: Action Required.
- Your gateways need to be updated to use Lets Encrypt ISRG X1 Root before the 30th Aug 2021.
- Please check the documentation specific to your brand/model.

Background
-------------
The DST Root CA X3 by Lets Encrypt will expire on the 29 September 2021.
For more information on Lets Encrypt's change of Root CA, please check the following links:
- https://letsencrypt.org/2020/11/06/own-two-feet.html
- https://community.letsencrypt.org/t/production-chain-changes/150739
Aug 4, 14:04 CEST