Mac OS X 10.2 or Later: Firewall Blocks Internet Sharing

Symptom

A client of your shared Internet connection can get an IP address from your computer, but it cannot actually access the Internet.


Solution

These steps open port 443, which should resolve the issue.

1. Turn on Personal Web Sharing in the Sharing preference pane.
2. Click the Firewall tab.
3. Click the New button.
4. From the Port Name pop-up menu, choose Other.
5. In the Port Number field, type: 443
6. In the description field, type: https

   

7. Click OK.
8. Turn off Firewall and Internet Sharing.
9. Turn on Firewall and Internet Sharing.