Canon Pixma MG3122 printer/scanner: Wi-Fi won't detect

[v-grimalkin]

No, it is not detected, and I was having the same problem with it on Cinnamon 17.3, too.  When I first installed Mint, I had to do something with Firewall rules, but of course I can't remember what (over 3 years ago).  It is now the default printer only works via USB connection.