Internet Sharing: Using the MacBook Pro as a Wifi Modem with its Ethernet Connection for the iPhone, connectivity issues I am endeavoring to use the MacBook Pro to broadcast its Ethernet Internet connection as WiFi, in order to access this connection through my iPhone. 

I have made the following configurations:



I have configured the Internet sharing network to employ WEP pass phrases et al.

In my Network Preferences, I have configured the Wifi to have a manually configured IPv4 Protocol with 192.168.1.1 being the Router, a DNS name server, a class C Subnet mask.

In my iPhone device, I have configured it as a Static IP configuration for the Wifi, with 10.1.1.1 being the MBP's IP and 10.1.1.2 being the iPhone's IP, with a class C Subnet Mask with a DNS name server, 10.1.1.1. being the router and local.lan for the Search Domains field.

The issue is: There is no Internet connectivity in the iPhone device. The device reports "Check if you have Internet Connectivity and try again"

iPhone 4 with iOS 5.1
MacBook Pro with Lion 10.7.4

Any insights into how this can be resolved?
I use my MacBook Pro to share internet to my iPhone and my friends' iPod Touch. 

Make sure that you're using WPA2 to secure your network, not WEP- I have had issues connecting my iPhone to WEP networks, and they're not only less secure but the password is more annoying to type anyway. 

Other than that, your IP schemes are also not compatible. You need to set the devices to have the same IP scheme; if your WiFi is set to a 192.168.1.1 address, your iPhone needs to be 192.168.1.2-255. Setting both to DHCP would help a lot here. 

For my setup, I just left everything as DHCP and don't have any issues.