IP address steps for Mac OS X
Open System Preferences from the Apple Menu
Select the connected network interface from the left sidebar: Wi-Fi or Ethernet.
Write down the Router IP address and Subnet Mask. Your Router IP Address will also be used as your DNS Server address.
IP address steps for Windows
Open the Control Panel from the Start Menu
In the search field, type Adapter
Click View Network Connections
Right-click the active network connection and select Status
Write down the IPv4 Default Gateway and IPv4 Subnet Mask. Your Default Gateway IP Address will also be used as your DNS Server address.