If a block firewall rule is set incorrectly, it could cause client IP address blocked by vCenter, and VAMI becomes inaccessible to remove the rule.
To remove firewall rule(s) to stop blocking the client from vCenter, please follow the steps below:
Confirm it is at appliance shell by checking command line. It should start with "Command>". If not, switch to appliance shell with this command:
appliancesh
Remove all firewall rules with this command:
com.vmware.appliance.version1.networking.firewall.addr.inbound.delete --all true
com.vmware.appliance.version1.networking.firewall.addr.inbound.list