So:Microsoft wrote:If you are trying to configure Connection Sharing manually for a connection, make sure that the home network adapter does not have ICF enabled. If ICF is enabled, you must either disable it before you can configure Connection Sharing on the external connection or use the Network Setup Wizard to enable ICS. The wizard disables ICF on home networking interfaces.
To open Network Connections, click Start, click Control Panel, click Network and Internet Connections, and then click Network Connections.
Click the Ethernet connection, and then, under Network Tasks, click Change settings of this connection.
On the Advanced tab, under Internet Connection Firewall, clear the Protect my computer and network by limiting or preventing access to this computer from the Internet check box.
That still leaves the firewall in place on your WiFi connection, so you are still protected.
Try that and then do the "traceroute 18.104.22.168" again.