Can't establish Wireless Connection

[SriKrsna]

I just don't understand why.

The connection by ethernet works perfectly fine.

The Wireless connection is established, signal quality is over 80%, but I can't connect to the www or the hdd connected to the router, while by ethernet it's absolutely no problem... IP-Settings are entered manually and are 100% correct, neither with nor without encryption a connection is possible...
A friend of mine is very good with networks and also says there should be no reason why it doesn't work...

please HELP

greetings, SriKrsna

PS: I'm using the newest OLEG-Firmware

[avberk]

If you are running in AP mode you have to add the
following to your post-boot file:

# Write DNS server to resolv.conf
echo "nameserver ip-of-your-dns-server" >> /etc/resolv.conf