The iDRAC user interface is no longer accessible after upgrading DDOS.
The user sees the error message 400 Bad Request.
There are two ways to work around this issue.
1) Add the hostname with
racadm set idrac.webserver.ManualDNSEntry <hostname>
2) Disable the hostname check with
racadm set idrac.webserver.HostHeaderCheck 0
Example for adding the hostname:
- Connect using SSH to the iDRAC interface.
- Using an SSH application such as PuTTY, connect to the iDRAC using the iDRAC IP address and with the root username.
- Run racadm get idrac.webserver
- Notice the ManualDNSEntry is blank
- racadm set idrac.webserver.ManualDNSEntry <hostname>
- Enter the iDRAC hostname in the command
- Run racadm get idrac.webserver
- The ManualDNSEntry should show the hostname.
- You can now access the iDRAC UI using the hostname.