ESXi 7 not able to connect vCenter

[ricky1008]

Hi All,

I'm facing challenge to connect esxi host to vcenter, which was working previously after changing  vmkernel  port for management. since than ESXi not responding in vCenter.

I did some troubleshooting and found some wired issue in esxi 7   that can be interesting for all of you.

Note:- vCenter and ESXi is in same vlan and same subnet.

vpxa service is running  and listen on port 902  -- but  not able to connect in vcenter ,  esxi host is  reachable from vcenter.

ssh service is running and listen on port 22----but  not able to access esxi  over ssh.

hostd service is running  and listen on port 443--  able to access esxi UI .

I ran nmap scan to verify  open ports in esxi  and found  443/tcp is open but 22 and 902  did not come in nmap scan  while services are running fine.

also tried to check with telnet that also not connecting .

i have attached screenshot for quick understanding .

Please check and suggest how can i fix it.

Thanks in advance. 

[bryanvaneeden]

What happens if you revert the change you made? Does that fix the issue?

[ricky1008]

Yes , i have reverted all the changes but still i can see same issue.

[bryanvaneeden]

Is this the only ESXi host having these issues? Did you restart the ESXi host already? If they are in the same VLAN (ESXi/vCenter) there is not much that can go wrong unless you have firewall services configured on the ESXi host.

[ricky1008]

Yes, There are  two esxi but  facing issue with one host only. 

No As It is running in production environment  only i have restarted management services not host.

I have disabled host firewall  but issue is the same.

[ricky1008]

@a_p_ 

@depping 

@IRIX201110141 

@ashilkrishnan 

@daphnissov

@Tibmeister 

Hi All,  can you help in to  fixing this issue.

[ricky1008 · Accepted solution]

After rebooting  esxi host its resolved automatically.

#reboot rocks