UPNP. This is an interesting subject. I enabled Upnp in my Linksys router as I was experimenting with ftp port setup.
The router kept addding forwarded ports for all the LAN pc's (3) with a label "msmsgs" .
Not sure what those are, but pretty clear it's something to do with microsoft. The whole idea of upnp is to configure networks automatically, which also allows anyone using the standard to pretty much do what they want.
I disabled those entries, but they kept re-enabling, until I disabled Upnp in the router setup screen.
One more thing to watch out for.
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