Only AHRS_UDP
The IP of your Tablet/iphone.
You rather don't need to do anything as long as you are in the same network, windows will allow the connection.
My PC has IP 192.168.1.34 (FIXED/Reserved on DHCP) and my iPad has the IP 192.168.1.58 (DHCP)
Usually the DHCP server is you router DSL/WIFI. Depends a bit on your network. If windows detects a new activity on the network, there is a good chance that it will ask you to confirm the dialog. Generally inside the own premises it will not block.
Hope this helps