Hi,

Check Prism Gateway service, this isn't running or is misconfigured on your Nutanix cluster.  You can SSH to the CVM (Controller VM) and ping both the CVM and AHV host IPs means that the network layer is working correctly, but the web server component of Nutanix's management interface is not. The error message "Error: Cannot connect to Prism Gateway" from the SSH shell confirms this.

How i check this?

The main network port used to access the Nutanix Prism Gateway is TCP port 9440. Check whether it is allowed in F/Wall or not

TCP 9463, 9361, 9362 are used for secure communication between Prism Central and Prism Element.

Ports TCP 3205 and 3260 are used for iSCSI data and control plane connections, respectively.

TCP 22 is used for SSH access to the Controller VMs (CVMs) and AHV hosts.

TCP 2074 is used for communication between the CVM and guest VMs for NGT.

there are no blocks in the firewall, how can i check is prism gateway service is running via ssh?

I can only acess via ssh at the moment :-(

in SSH run the command:

 cluster status

up means the service is running

down means the service is stopped

2025-09-02 12:53:26,522Z CRITICAL MainThread cluster:3241 Cluster is currently unconfigured. Please create the cluster.
nutanix@NTNX-189ea9ec-A-CVM:10.93.19.51:~$ 

it is a standalone host… it needs cluster configuration?
 

Yes, ofcourse. We have to create cluster of one host.

run this command: cluster -s 10.93.19.51 --redundancy_factor=1 create