Dell Data Domain GUI Inaccessible Due to Expired HTTPS Certificate

Dell Data Domain GUI Inaccessible Due to Expired HTTPS Certificate

Issue

Users are unable to access the Data Domain GUI. The following symptoms may be observed:

  • SSH access using the sysadmin account is successful.

  • HTTPS is enabled on the Data Domain.

  • GUI access fails or displays HTTP errors (such as HTTP 404).

  • The Data Domain HTTPS certificate has expired.

Environment

  • Dell EMC Data Domain

  • IDPA with integrated Data Domain

  • Self-signed HTTPS certificate

Symptoms

  • Login to the Data Domain via SSH works successfully.

  • Login to the GUI fails or the GUI does not load correctly.

  • Browsing to the Data Domain management IP may display HTTP 404 errors.

  • No active system alerts are present.

Screenshot 1 – GUI Error

Verification

Verify HTTPS is Enabled

adminaccess show

Verify User Account Status

user show list

Confirm that the sysadmin account is enabled.

Check Certificate Expiry

adminaccess certificate show

Example:

Subject                  Type   Application   Valid Until
idpa-ddve.cds-ad.co.uk   host   https         Fri May 15 08:18:44 2026

Screenshot 2 – Expired HTTPS Certificate

Root Cause

The self-signed HTTPS certificate used by the Data Domain management interface had expired. As a result, GUI access was impacted even though SSH access remained available.

Resolution

Generate a New Self-Signed Certificate

adminaccess certificate generate self-signed-cert

Screenshot 3 – Certificate Generation Command

Insert screenshot showing successful execution of the certificate generation command.

Verify the New Certificate

adminaccess certificate show

Confirm that the HTTPS certificate now shows a valid future expiry date.

Restart HTTPS Services

adminaccess disable https
adminaccess enable https

Screenshot 4 – New Certificate Details


Validation

Open:

https://<Data_Domain_IP>/ddem

Verify:

  • GUI loads successfully.

  • Login page is accessible.

  • sysadmin login is successful.

  • HTTPS certificate is valid.

Screenshot 5 – Successful GUI Login


References

Dell KB: 000198864 – Data Domain GUI Issues Due to Expired HTTPS Certificate - https://www.dell.com/support/kbdoc/en-in/000198864/data-domain-gui-issues-due-to-expired-https-certificate

Notes

  • Applicable to self-signed certificate deployments.

  • For CA-signed certificates, generate a CSR and import a new certificate instead of generating a self-signed certificate.

  • Always verify certificate validity after renewal.