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HTTP/1.1 400 Bad Request on sensor for outlook.office.com

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Randomly we are getting false positive failures on our HTTP sensor for outlook.office.com. This started over the weekend and is still going. No changes were made and it was working fine before.

I found the following article: https://kb.paessler.com/en/topic/67398-my-http-sensors-fail-to-monitor-websites-which-use-sni-what-can-i-do I worked through changing the url, creating a new HTTP Advanced sensor, scanning interval, timeout, etc, but nothing is working.

Has anyone seen this with this URL? All of our other website sensors are monitoring without issue.

bad-request http https website

Created on Aug 26, 2019 6:09:49 PM by  Michael Love (0) 1



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Michael,

When this sensor has issues, are you able to get to outlook.office.com from the PRTG server?

Benjamin Day
[Paessler Support]

Created on Aug 26, 2019 6:12:42 PM by  Benjamin Day [Paessler Support]



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Yes, we're able to connect to the URL from the PRTG server and from the clients. I tried creating the sensor under a probe server as well, but it still keeps flapping.

FYI that's for the quick reply.

Created on Aug 26, 2019 6:16:54 PM by  Michael Love (0) 1



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What URL are you specifically connecting to? Can you open a support ticket, and send me a screenshot of the error message you are getting?

Benjamin Day
[Paessler Support]

Created on Aug 26, 2019 6:56:34 PM by  Benjamin Day [Paessler Support]



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