NVP vProxy: VM Restore Fails With "Failed to find virtual machine for vProxy by IP POST "sdk": 401 Unauthorized"

Summary: All Virtual Machine (VM) restores to a target vCenter server used for restores only fails with "Failed to find virtual machine for vProxy by IP POST "/sdk/": 401 Unauthorized"

This article applies to This article does not apply to This article is not tied to any specific product. Not all product versions are identified in this article.
Check out other resources

Symptoms

A VM restore is being performed through the NetWorker VMware Protection (NVP) vProxy appliance to a target vCenter.

Backups from the target vCenter are not being performed, only restores. 

The restore session of any VM restore contains:

nsrvproxy_recover: vProxy Log: YYYY-MM-DDTHH:mm:SS ERROR: [NW_BUILD#] Failed to find all virtual machines by IP: POST "/sdk"; 401 Unauthorized

The saved recover log is available on the NetWorker server under:

  • Linux: /nsr/logs/recover
  • Windows: C:\Program Files\EMC NetWorker\nsr\logs\recover

The vProxy appliance that is used for recovery contains the recovery logs under:

  • /opt/emc/vproxy/runtime/logs/vrecoverd
  • /opt/emc/vproxy/runtime/logs/recycle/vrecoverd/DATE

Cause

The vProxy contained an /etc/hosts file entry for the vCenter, but the IP address was incorrect. The remote system listened on port 443, so connections appeared successful, but recovery could not identify the vProxy in vCenter by its IP address.

Using the ProxyHC utility with the auth switch the following was logged in /tmp/proxy-hc.log:

proxy-hc log
Figure 2: proxy-hc.log

Resolution

Ensure that the vProxy is resolving the target vCenter to the correct IP address. 

nslookup address
NOTE: The Fully Qualified Domain Name (FQDN), shortname, and IP address should all resolve.

If the vCenter is fully Domain Name System (DNS) resolvable, remove the entry from the /etc/hosts file. 

Additional Information

Affected Products

NetWorker

Products

NetWorker Family, NetWorker Series
Article Properties
Article Number: 000206164
Article Type: Solution
Last Modified: 11 Nov 2025
Version:  7
Find answers to your questions from other Dell users
Support Services
Check if your device is covered by Support Services.