Finance director could not access gmail or other websites. Using Windows 7. Wifi shows bars but has “!” symbol.
Anonym
Check to make sure DHCP is enabled by going to System Preferences > Network > select Wi-Fi / Airport > select Advanced. From here, choose TCP/IP, and make sure "Configure IPv4" and "Configure IPV6" are set to "Use DHCP" and "Use Automatically" respectively. Then, go to the DNS tab. Clear out any servers you see here by selecting their IP Addresses and clicking the Minus sign.