# Siemens S71200 PLC:Connection refused by Cloud Broker

**URL:** <https://community.hivemq.com/t/siemens-s71200-plc-connection-refused-by-cloud-broker/2654>\
**Category:** HiveMQ Cloud\
**Created:** [January 26, 2024, 10:16pm UTC](https://community.hivemq.com/t/siemens-s71200-plc-connection-refused-by-cloud-broker/2654 "2024-01-26T22:16:56Z")\
**Posts on this page:** 1\
**Showing post:** 4

<div class="post-metadata">

**Author:** ![jzamora](https://yyz1.discourse-cdn.com/flex035/user_avatar/community.hivemq.com/jzamora/32/882_2.png) [@jzamora](https://community.hivemq.com/u/jzamora)\
**Post date:** [February 26, 2024, 6:09pm UTC](https://community.hivemq.com/t/siemens-s71200-plc-connection-refused-by-cloud-broker/2654/4 "2024-02-26T18:09:15Z")

</div>

Hello, I think I know why my Siemens S71200 PLC is not connecting to HiveMQ Cloud Broker, I was informed by a Siemens Technical Support person that TLS-SNI extension as of today is only supported by S71500 PLCs with firmware version 3.1 and above.

---

_[View the full topic](https://community.hivemq.com/t/siemens-s71200-plc-connection-refused-by-cloud-broker/2654)._