# ECE Fundamentals : Lesson 4 (Features) Proxy issue

**URL:** <https://discuss.elastic.co/t/ece-fundamentals-lesson-4-features-proxy-issue/303430>\
**Category:** Kibana\
**Created:** [April 27, 2022, 4:26pm UTC](https://discuss.elastic.co/t/ece-fundamentals-lesson-4-features-proxy-issue/303430 "2022-04-27T16:26:32Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![alombard](https://avatars.discourse-cdn.com/v4/letter/a/6f9a4e/32.png) [@alombard](https://discuss.elastic.co/u/alombard)\
**Post date:** [April 27, 2022, 4:26pm UTC](https://discuss.elastic.co/t/ece-fundamentals-lesson-4-features-proxy-issue/303430/1 "2022-04-27T16:26:32Z")

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Hello,

I'm currently training through Elasticsearch learning center but I'm having trouble at the Lesson 4's lab. I was required to update my cluster from v7.17.1 to v8.1.0, this part went fine, but after that, everytime I tried to open Kibana, I met the same error : connection refused by proxy.

I tried rebooting Kibana, the cluster and the virtual machines themselves but this didn't solve the issue and I'm not keen to go on blind counter-measures in case I would messed up the whole lab environment.

What am I missing here? How can I troubleshoot this without compromising my progress please?

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**Author:** ![dinyes](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/dinyes/32/42906_2.png) [@dinyes](https://discuss.elastic.co/u/dinyes)\
**Post date:** [May 11, 2022, 4:41pm UTC](https://discuss.elastic.co/t/ece-fundamentals-lesson-4-features-proxy-issue/303430/2 "2022-05-11T16:41:17Z")

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Good day,

Is it possible your Strigo environment went offline before you attempted lab 4? If so, you may want to try doing lab 3 step 11 again, as your public IP may have changed. Let me know if that helps!

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**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [June 8, 2022, 4:41pm UTC](https://discuss.elastic.co/t/ece-fundamentals-lesson-4-features-proxy-issue/303430/3 "2022-06-08T16:41:19Z")

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