Take the router defaults, use a simple SSID then move to WPA2 AES.
This usually gives us a nice secure connection but if the distance is too far, it will drop.
I bought a Netgear WNDR3400 router about 6 months ago and it has worked perfectly. A few weeks ago I started getting disconnected from the PSN within 10-15 minutes of signing in. Rebooted it, checked for firmware upgrades...nothing. Reset it to default settings...still nothing. Disabled media sharing on the PS3, assigned a static IP and dropped my PS3 into DMZ and have disabled upnp (on both router and PS3) and still nothing. Is my $80 router really spent after just 6 months? Any help would be greatly appreciated.