Upgrade D Link Dir 600M Router
If You are want to upgrade your D-Link Dir 600 Router or You getting error like (WAN IP must be on these networks) Then follow the steps shown in video and upgrade your Router and use it.
Download firmware: Dir-600M firmware With below Link
https://shrinke.me/8TbNYHS
(Note: Added new firmware file DIR-600M_V3.04ENB03_webupload.img)
Then go to : 192.168.0.1/Tools/Firmware.asp
You will get an option to upload the firmware file from there. :)
If you do not have access to 192.168.0.1, just hard reset the router and then try again.
Note: My model was DIR-600M C1 v3.02 / Your model might be different and may require different firmware.(?)