The UPnP protocol has a long standing history of security problems, not the least of which being that it allows unauthenticated devices to connect to and through your home network.
TLDR; UPnP is a flawed protocol which has been leveraged numerous times to conduct widespread attacks via large numbers of insecure devices. Do not enable UPnP on your network. Or do, but understand the potential consequences of your decision.
The rest of what follows is a rant/opinion/soapbox based on a number of years of experience in the real world of IT Security and Risk Analysis, and the cumulative research on the subject that goes with such. Continue reading “UPnP – Why I don’t allow it on my Home Network”