Epson Stylus NX420 - Manual (Page 16)

16 Wireless Network Setup
8. When you see the Firewall Warning screen, click Next .
Note:
If you see a firewall alert message, click Unblock or Allow to let EpsonNet Setup
continue. Do not select Ask Me Later, Keep Blocking, or Block.
9. If you see a screen like this one, select the printer you would like to set up,
then click Next .
10. Wait while EpsonNet Setup configures your printer for the network.