traceroute: bad address 'openwrt.org'
ping: bad address 'openwrt.org'
Server: 127.0.0.1
Address 1: 127.0.0.1 localhost
nslookup: can't resolve 'openwrt.org': Name or service not known
Taking a guess I would say that you need to put 8.8.8.8 into 'WAN/Custom DNS Servers' in the web interface.