# HTTP 401 error & 12183 - The site reported HTTP\_RESPONSE\_CODE\_FAILURE **URL:** \ **Category:** Synthetic Monitoring\ **Tags:** public-synthetic-locations, browser-monitors, synthetic-monitoring, private-synthetic-locations\ **Created:** [December 11, 2024, 11:53am UTC](https://community.dynatrace.com/t/http-401-error-12183-the-site-reported-http-response-code-failure/49308 "2024-12-11T11:53:37Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![Adi\_10](https://avatars.discourse-cdn.com/v4/letter/a/ce7236/32.png) [@Adi\_10](https://community.dynatrace.com/u/Adi_10)\ **Post date:** [December 11, 2024, 11:53am UTC](https://community.dynatrace.com/t/http-401-error-12183-the-site-reported-http-response-code-failure/49308/1 "2024-12-11T11:53:37Z")
Hi Team, I have created a Browser click path synthetic monitor for my application URL … hitting traffic from public location does not work as firewall not opened and throws 12013 DNS Lookup failure. Using private Active gate locations, Still I am getting below errors -  **12183 - The site reported HTTP\_RESPONSE\_CODE\_FAILURE** However, I am hitting url from my system within company network I am able to open the URL no issues in it. ![Adi_10_0-1733917658409.png](https://global.discourse-cdn.com/dynatrace/original/2X/4/4a202ee4b9d6c2b9d6c6457f1b0c2702fe1eaaf5.png) How Can I solve this issue, Access is given to Dynatrace account, No Authentication token is needed. ---
**Author:** ![hannahmac](https://avatars.discourse-cdn.com/v4/letter/h/dec6dc/32.png) [@hannahmac](https://community.dynatrace.com/u/hannahmac)\ **Post date:** [December 11, 2024, 12:04pm UTC](https://community.dynatrace.com/t/http-401-error-12183-the-site-reported-http-response-code-failure/49308/2 "2024-12-11T12:04:48Z")
401 generally means you need to add some credentials into the monitor, so possibly you need to add them in the [HTTP Authentication field](https://docs.dynatrace.com/docs/observe/digital-experience/synthetic-monitoring/general-information/synthetic-authentication#http-bm) Otherwise, can you run through the troubleshooting steps [here](https://community.dynatrace.com/topic/213876)? ---
**Author:** ![dynamic](https://avatars.discourse-cdn.com/v4/letter/d/b5ac83/32.png) [@dynamic](https://community.dynatrace.com/u/dynamic)\ **Post date:** [February 18, 2025, 7:06pm UTC](https://community.dynatrace.com/t/http-401-error-12183-the-site-reported-http-response-code-failure/49308/3 "2025-02-18T19:06:57Z")
I am having the same problem on all of my synthetic that uses authentication from the vault. “Playback error: The site reported HTTP\_RESPONSE\_CODE\_FAILURE.” when I try to play back all my synthetics I get this response, however the on-demand execution succeeded. Can someone help pls? ---
**Author:** ![Adi\_10](https://avatars.discourse-cdn.com/v4/letter/a/ce7236/32.png) [@Adi\_10](https://community.dynatrace.com/u/Adi_10)\ **Post date:** [February 19, 2025, 7:23am UTC](https://community.dynatrace.com/t/http-401-error-12183-the-site-reported-http-response-code-failure/49308/4 "2025-02-19T07:23:49Z")
Hi [@dynamic](https://community.dynatrace.com/user/66740) , Dont worry about 401 error, If this works - on-demand execution succeeded all well. Also make sure you ignore this specific error code like 401 unauthorized, in that particular scenario from synthetic setting ![Adi_10_0-1739949813489.png](https://global.discourse-cdn.com/dynatrace/original/3X/c/3/c3c600f1c2d8d2425cf1c3b015c5998b89cf13d3.png)