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MKS Connectivity issue

When I try to open the console of a VM I connect to from vSphere client I get the error

"unable to connect to the MKS: Failed to connect to server 10.10.20.48:902".

When I connect to the same VM from vSphere Client installed on another machine it works fine. Or if I restart my machine and try it works. The issue occurs once in two or three months. Why is it so??

attached is the screen shot for clear description
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Druva Simha Kolli
Asked:
Druva Simha Kolli
1 Solution
 
Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
Disable the firewall ?

The Console, is displayed via modified VNC, via Port 902.

telnet <ip address> 902

where IP Address is the ESXi server ?

do you get a connection?

check and connect via IP Address.

also check you can resolve the Hostname via DNS, or create a hosts file entry.
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Druva Simha KolliAuthor Commented:
Hello Andrew,

Was away on a visit to a client.. and so the delayed response... The telent will not work as we have disabled the access.

will that be an issue.?
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
Telnet provides you with a quick tool, to check if port 902 TCP is open on the server.
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Druva Simha KolliAuthor Commented:
but I am able to connect to the same host from another desktop.. why not mine? is it something to do with my PC?
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compdigit44Commented:
What OS is your workstation running?
IS AV installed?
Are you using a Wired or wireless connection?
Any error in the event logs on your workstation when the issue happens
Have you tried to run a packet trace using wireshark or Network monitor to monitor your vsphere client connection to the host?
If using a wired connection, and port errors on the switch your workstation is connected to?
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
If you have disabled telnet, what other firewall ports have been discontinued.

Can you DISABLE you firewall.....
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gheistCommented:
If the issue repeats every couple of months I suggest you install monthly microsoft patches and never face any issue again.
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