# Cannot POST - Post raw data to a flow

**URL:** <https://discourse.nodered.org/t/cannot-post-post-raw-data-to-a-flow/66923>\
**Category:** General\
**Tags:** http-request\
**Created:** [25 August 2022 16:21 UTC](https://discourse.nodered.org/t/cannot-post-post-raw-data-to-a-flow/66923 "2022-08-25T16:21:47Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![pacmanmt](https://avatars.discourse-cdn.com/v4/letter/p/dfb087/32.png) [@pacmanmt](https://discourse.nodered.org/u/pacmanmt)\
**Post date:** [25 August 2022 16:21 UTC](https://discourse.nodered.org/t/cannot-post-post-raw-data-to-a-flow/66923/1 "2022-08-25T16:21:47Z")

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Hi all, I am a newbie starting to work with Node-RED walking trough the many examples found here.  
I am using a Raspi 4B 8GB with SignalK vers. 1.44.0 and its Node-RED plugin ver. 2.1.6.  
Node version is 14.20.0.

I have simply copied into Node-RED the example flow found in the cookbook example "Post raw data to a flow" and after deploying, I ran the suggested curl command from a terminal window directly on the Raspi where Node-RED is running.  
I get a Cannot POST error in reply; I made several searches to try to address the issue but found nothing of help.  
As said I am new to this and I sincerely don't know how to dig in the issue to understand where the culprit is.  
I know that it is supposed to work flawlessly, but it doesn't.  
May I ask some help, please?

N.B: by the way I also tried with a fresh install of the same configuration and I get the same error

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**Author:** ![pacmanmt](https://avatars.discourse-cdn.com/v4/letter/p/dfb087/32.png) [@pacmanmt](https://discourse.nodered.org/u/pacmanmt)\
**Post date:** [1 September 2022 19:05 UTC](https://discourse.nodered.org/t/cannot-post-post-raw-data-to-a-flow/66923/2 "2022-09-01T19:05:19Z")

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I figured it out with the help of the SignalK team.  
It doesn't work because the security settings of SignalK, apply to the Node-RED plug in as well.

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**Author:** ![system](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/1X/d073cd938eafa2e558d7c2cd59003b3ef4963033.png) [@system](https://discourse.nodered.org/u/system)\
**Post date:** [15 September 2022 19:05 UTC](https://discourse.nodered.org/t/cannot-post-post-raw-data-to-a-flow/66923/3 "2022-09-15T19:05:33Z")

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