HttpPost from Alarm Pipeline timing out?

I’ve got a script that’s running fine in the console, makes Adaptive Card posts to Teams and works well. I tried run it from an Alarm Pipeline, both being triggered by an active event and trying it testing from the gateway interface and in both instances it hangs and then times out? that’s the error that returns - is there some security feature I’m missing that might be blocking this, or something I’m overlooking?
The Alarm Pipeline is only the script function. I tried adding a delay after the script just in case to see if it executes

Windows gateway? Is the gateway service running as LOCAL_SYSTEM ? It doesn’t have network privileges by default.

That was entirely it thank you!

Even stupider, I was doing this on my development test gateway. On our production gateway, we don’t have any internet access… so…