Unity: Accessing Unisphere Fails with Forbidden Untrusted Hostname Error due to NAT IP Usage
Summary: Accessing Dell Unity Unisphere with a Network Address Translation (NAT) IP address results in a 'Forbidden Untrusted hostname' error due to unsupported Network Address Translation (NAT) configuration, which is not compatible with single sign-on or local login. ...
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Symptoms
On Accessing Unisphere, NAT IP was used leading to error:
Forbidden Untrusted hostname
Cause
NAT IP was used instead of local management IP.
Resolution
Single sign-on does not support a NAT configuration. Also, NAT is not supported for local login through Unisphere to the storage system.
See the Dell Unity Family Security Configuration Guide for details.
See the Dell Unity Family Security Configuration Guide for details.
Affected Products
Dell Unity 300, Dell EMC Unity 300F, Dell EMC Unity 400, Dell EMC Unity 400F, Dell EMC Unity 500, Dell EMC Unity 500F, Dell EMC Unity 550F, Dell EMC Unity 600F, Dell EMC Unity FamilyArticle Properties
Article Number: 000050531
Article Type: Solution
Last Modified: 22 Oct 2025
Version: 4
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