I have a Linksys EA6200. My ISP is calling me and telling me I have an Open NTP server on my network. I've done my best to make sure my 2 PCs are clean. I suspect that it come from a new IP camera server that I just added. I've read about what NTP is and why it can be use in DDoS, and that it use port 123. My ISP is requesting that I close this but they are not telling me how to do it. What would be the best way to satisfy my ISP ? Would closing outgoing traffic on port 123 in the firewall be enough ? And if so what's the best way to do that in my router ? And can I do that without loosing the functionality to access the camera from the outside.
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