Unable to access new RB5009UPr+S+IN router

What do you mean disabled firewall??

Places to start BEFORE TINKERING…….

https://www.youtube.com/watch?v=rwjtRLQjMjA&t=33s

https://www.youtube.com/watch?v=EX6QqHmbBpY&list=PLJ7SGFemsLl0ld4OrcnVBHg4kPk0Y2_Z9

https://www.youtube.com/watch?v=EYCjuvTd3dY