If you are experiencing issue accessing GameMaker, such as being shown the error "Unable to Login - Cannot reach https://accounts.yoyogames.com" when trying to log in then we would suggest that you try the following:
Simply whitelisting "*.yoyogames.com" (with the asterisk) should catch all of our URLs that the software needs however, if you need to specify them individually they are as follows:
- yoyogames.com
- store.yoyogames.com
- marketplace.yoyogames.com
- gms.yoyogames.com
- account.yoyogames.com
- accounts.yoyogames.com
Port 80 and Port 443 are required to run GameMaker so you should also ensure that these are not being blocked in any way