Originally Posted by jbyrne

I was having similar problems with my Linksys WAG354G wireless router and my new HTC Hero (SIM free). I could connect to the wireless network (WEP with MAC address filtering) and I could get to various web servers on the network but when I tried an external address like google.com I didn't get anything. I tried the test suggested by spiri on the first page of this thread where you put in an IP for google instead ( 74.125.45.100 ) and it worked so I realised I have a DNS issue. After talking with a friend and after having similar issues on his network, we used a static IP configuration with an external DNS server address as DNS1 (Home button->menu button->settings-> wireless controls->Wi-Fi settings->menu button-> advanced->tick use static IP and edit settings) as I'm in Ireland I used both an Eircom and BT Ireland DNS server (BT: 194.125.2.240) and all is working fine!

Just thought I'd post my fix as it might help someone troubleshoot their own issues