Problem:
Fired WebHook is not received at RequestBin
Can't find the problem, why the webhook isn't able to run
Information:
JIRA Software 7.3.8
Running on a vserver
also using a proxy in the network
Done:
I've already done the diagnosis part 5 of the following link:
https://confluence.atlassian.com/jirakb/how-to-collect-data-for-atlassian-support-for-troubleshooting-jira-webhooks-397083035.html
So in my log file I can see
2017-08-17 10:37:36,056 Web-Hook-Publisher-0 DEBUG USER 585x1337x1 AA.BBB.CC.DDD /rest/greenhopper/1.0/sprint/3 [c.a.webhooks.plugin.PublishTaskFactoryImpl$PublishTaskImpl] Posting to web hook at 'http://requestb.in/1ehmfhr1?user_id=USER&user_key=USER', body is:
{"timestamp":1502959056056,"webhookEvent":"sprint_created","sprint":{"id":4,"self":"http://NAME/rest/agile/1.0/sprint/4","state":"future","name":"Sprint 1","originBoardId":1}}
after creating a sprint (my event).
But RequestBin doesn't receive any requests.
By clicking on the link in the admin panel, the request to RequestBin returns "OK"
Webhook configuration:

Question:
Any Idea what the problem could be?