In the theme of urgency, a quick reply...
Have you tried restarting the Server? Normally solves a lot of things
I presume you retain internet access on the desktop PC?
Also, I will move this thread to Server Admin.
Based on the given error message the problem is with your network connectivity (broadly speaking) and not with Tableau. Or the host server could be down.
Like Mark stated, try rebooting the Tableau Server. If you can't even connect to the Tableau Server then you've found the problem (connectivity issue unrelated to Tableau).
is your Tableau Server SSL enabled? It's worth trying https when connecting just to see if this works. If it does, then SSL encryption is turned on within server.
We didn't touched any modification in tableau server side. But still same issue only.
I have restarted the server also , even though the same issue.
please help me out , if there is any where i need to check.
waiting for your valuable reply.
were there other changes to the environment such as firewall mods, install of new software that is blocking a port (e.g. IIS), VM cluster updates? It looks like desktop can't reach server and you have to dig...
Try "pinging" your server from the machine you're trying to access it (e.g. the one that has the Desktop version used to publish).
Assuming it is a Windows machine and you have a DNS set-up, open a CMD session and type:
C:\...> ping dbswfatapv01.us.dnb.com <enter>
If it doesn't come back with a response (usually the time it takes to hit the server, in mili-sec's), then either the server is not accessible from the LAN, or the publishing machine is blocked to access the server...