Has anybody messed around with this file I noticed http_trigger.cgi?

My assumption is that it is what I'd need to post to from an external source(like when a front door opens and I want to trigger video capture, but not based on motion). The only issue is, I don't have the tools to reverse engineer this cgi script and I no longer have the security system to packet sniff for calls to it(like I think was happening) in order to figure out what parameters it needs to test my hypothesis.

Thanks