Uncaught Error: java.net.SocketTimeoutException: failed to connect to /192.168.0.102 (port 19000) - Doubt on security

Uncaught Error: java.net.SocketTimeoutException: failed to connect to /192.168.0.102 (port 19000) from / 192.168.0.100 (port 42950) after 10000ms #876 This issue is already resolved at https://github.com/expo/create-react-native-app/issues/876

By changing my "wifi settings from public to private in Windows" it worked for me. But i wanted to know if this is secure? Is there a more secure way of doing this, because my lan has number of devices connected.