Did you want to open the port from external to your internal 192.168.1.15 device or did you want to have your internal device the only device that can access that port to the outside world? If the first is the case than above is the solution. If you want the second then you have to create a firewall rule (and disable or delete the created DNAT rule)
Did you want to open the port from external to your internal 192.168.1.15 device or did you want to have your internal device the only device that can access that port to the outside world? If the first is the case than above is the solution. If you want the second then you have to create a firewall rule (and disable or delete the created DNAT rule)
