Perhaps this is a trivial posting, but it would have saved me some time if I have found it.
Wasted several hours after changing to a D-link DIR 825 router attempting to connect to my XBOX 360 (S) without success.
Tried to use the 5 GHz broadcasting with following settings (the 5 GHz SSID didn't show up in the XBOX wireless list but I'm one of those ignorant trial & error - WOW IT WORKS!? guys):
- locked on 802.11n and WPA2,
- disabled Multicast Streams in "Advanced/Advanced Network",
- disabled WI-FI protected setup in "Advanced/WI-FI Protected Setup" (maybe unnecessary)
- disabled SPI and TCP & UDP Endpoint Independent i "Advanced/Firewall Settings/Firewall Settings"
In the end it was resolved by the info in solution 5 on the xbox page:
http://support.xbox.com/en-us/pages/xbox-live/troubleshoot/connection-issues/cant-connect-to-xbox-live-wizard.aspx
The XBOX:es with built in wireless can only use the 2.4 GHz connection, and to be able using 5 GHz broadcast I apparently have to get the "black adapter".
So selecting the 2.4 GHz SSID in the XBOX wireless network setup solved the problem.
(I do use Mac address filtering but I don't think it matters).
Kind Regards,
Martin