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port scanner not showing ports that I know are open

Tags:
  • Cameras
  • Port
  • Scanners
September 23, 2014 1:54:13 PM

So I'm trying to figure out how to write a program in python that periodically pings a camera system from across the internet and emails me if it cannot connect. I setup port forwarding on the router and can watch the cameras from my phone so I know the system is working but when I try to scan the port it shows as closed.... What's going on? Also when I port scan the IP it shows stuff like port 80 being closed which seems weird.
Thanks!

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