@David-TP Not so far but those messages do not come very often. It may be another month before I see one.

@HCooney Thanks. Port 5353 is not open on my smartphone. UPNP was enabled and I have disabled it.

@HCooney I received an email from my ISP. This is the text. "We're Emailing to let you know that your home network has been identified as having a potential Multicast DNS (mDNS) vulnerability. An...

My ISP recommends that I block port 5353 to prevent a device in my network from being used as part of a botnet. How can I block a port?