主题：小心地探讨我们可以用Ubuntu干些什么，不能干什么？ -- yueyu

I setup wireless on desktop machine. but laptop does not work:

wireless connection good, light is on, and the icon shows connected. I have IP on laptop, but can not ping out to the router or other machine. I can ping from desktop to laptop.

laptop did not work before, only this time, update and installed the wireless driver.

wonder if there any setting on firewall?

how do I check and fix?

Thank you in advance.