I just upgraded iDRAC8 in four PE M630p blades of our VRTX to 2.80.80.80 and can't connect to their Web UI anymore using FQDNs I have registered for them in our DNS - browsers and curl report that server returned empty reply, though TLS handshake completes. But I can access them via the CMC by clicking on "Launch iDRAC GUI" button, which redirects to iDRAC's IP address rather than FQDN. Surprisingly, if I access GUI using https://ip.ad.dr.es they work, but not if I use the FQDN, which resolves to this same IP address.
Release notes for 2.80.80.80 state that one of the fixes is, quote, "Fixed an issue launching iDRAC Web UI from FQDN.". I'd say it broke this functionality instead since I was able to access iDRAC Web UI using either IP or FQDN before this release without any issues. Is there any way to get this fixed any time soon?
@Philip-R , Are you using FQDN which is same as iDRAC DNS name and domain name configured on iDRAC.
This release have Host header security issue fix (Link) and launching iDRAC with hostname and FQDN will work by default if hostname/FQDN used is matching with DNS Name and Domain configured on iDRAC. If you are using a different name to launch iDRAC than one configured in iDRAC then you can add the hostname/FQDN used for launching as an exception by using below racadm command to make it work
To add hostname/FQDN as an exception
racadm set idrac.webserver.ManualDNSEntry test.domain.com
You can also disable host header check on iDRAC by running below command. This command will disable security fix of host header check (Link)
racadm set idrac.webserver.HostHeaderCheck Disabled
After upgrading to 2.80.80.80, the web UI appears completely unavailable.
The last release, 2.75.100.75 retroactively added a "Fixed CVE-2021-21510" item to the release notes, which concerned the redirections from http://hostname/ to another URL.
DELL-Shine K
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Posted July 20th, 2021 02:00
@Philip-R , Are you using FQDN which is same as iDRAC DNS name and domain name configured on iDRAC.
This release have Host header security issue fix (Link) and launching iDRAC with hostname and FQDN will work by default if hostname/FQDN used is matching with DNS Name and Domain configured on iDRAC. If you are using a different name to launch iDRAC than one configured in iDRAC then you can add the hostname/FQDN used for launching as an exception by using below racadm command to make it work
To add hostname/FQDN as an exception
racadm set idrac.webserver.ManualDNSEntry test.domain.com
You can also disable host header check on iDRAC by running below command. This command will disable security fix of host header check (Link)
racadm set idrac.webserver.HostHeaderCheck Disabled