Recent content by Uluqat

I tried turning off Stealth Mode in the Mac's firewall settings, but that didn't fix the error. However, I think I finally got the right phrase to google: "mdnsresponder pcp map failed". That led me to this thread...

I found some log entries on the Mac that matched timestamps with an instance of the error. These 8 entries seemed to be consistent in other instances of the error. The four "private" entries are all the same, and so are the four "Stealth Mode" entries.

After some fumbling around until I could force the error to happen, I found some log entries that seem to go with the error. I don't know if they add any useful information. Jan 28 03:10:44 miniupnpd[7810]: PCP MAP: failed to add mapping TCP 9->192.168.50.162:9 'PCP MAP...

No, I don't know of anything like that. Our mobile devices are two iPhones and an iPad, and it seems like we would need to have installed an app specifically to do that, and we have no reason to do that.

After turning off WOL, I rebooted the Mac and rebooted the router, but the error is still occurring.

Didn't think I was using Wake On LAN, certainly have never had any need for it. I had to google how to turn it on in macOS. So I go to System Preferences -> Energy Saver and "Wake for network access" is on. WTF? I have turned it off now. Thank you! Edit: After doing that, I hit the "Restore...

I am running Merlin's 384.14_2 on my ASUS RT-AC86U and the router log is showing an error every 15 minutes that I don't understand: Jan 27 14:35:49 miniupnpd[1460]: PCP MAP: failed to add mapping TCP 9->192.168.50.162:9 'PCP MAP 68e9e3fadbd4ca8c3e79352b' Jan 27 14:50:49 miniupnpd[1460]: PCP...

The comments in the Ars Technica article seem to suggest that something can be done, for at least some of those with routers separate from modems: blocking the modem IP address at the router. I shall quote one of the Ars Technica article comments by a user named TwoChoices: