In upgrading the firmware on my home router, I re-encountered an option
for enabling or disabling UPnP. The default was enabled.
I see some network announcement traffic (239.255.255.250.ssdp), but it
doesn't seem excessive.
In general, discovery seems like a good thing -- unless one has reasons
for hiding things. But I don't know if UPnp really adds something beyond
other router-specific mechanisms?
I see some writing about UPnP risks, but I haven't seen a concise summary.
Should routers have UPnP on or off?
What about other servers?
Linux clients?
Windows clients?
Regards,
..jim
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