Thanks for your reply. I changed the url now. It works now.

I don't know if these workaround works. Someone told me this.

Netgear DG834G setup.cgi Debug Mode Local Net Access>

I can ensure the administrative interface is protected via .htaccess. As suggested from www.osvdb.org

Netgear DG834G Zebra Service Default Account>

I can get the latest firmware and read it using hex editor then change the Default Account password "Zebra" to something else. And then upload the firmware to my router again.

Can someone advise me whether this will actually work.

Thanks in advance.