I am testing a software based firewall (e.g. IPCop, Astaro, Untangle, etc) and when I get tired of it, I bypass it and rung
netsh interface ip set address name="Local Area Connection" static 192.168.21.2 255.255.255.0 192.168.21.1 1
and all other devices are wifi so I just toggle wifi and it gets the 192 address.
I don't want to login to the printer gui everytime I get mad at the firewall. Trust me, their "upgrade" was not an "upgrade", it was a, "we broke everything to get support money".