RE: iDRAC 6 Webpage cannot be found error
Ensure that your BIOS is also up to date. Try using another latest and supported web browser and see whether the web page launches. You may also add the iDRAC URL or IP address to the Compatibility View Settings hence go to Tools -> Compatibility View Settings. On the text box below the Add this Website paste iDRAC URL or IP address -> Add and close. The web page should be able to re-launch. Depending on the browser, you can add the iDRAC IP or URL to the Trusted Websites as well.