Host unreachable

Hello, vision client stop working or lost connection on a remote PC. Keeps saying host unreachable but the host is running and I can ping it.
Any help would be great.

Is the firewall on the igntion gateway running, and is port 8088 incoming allowed?
Can you connect to a client on the server itself?

yes I can connect to client “on” the server.
this has been running for about 1 year, so maybe IT did some update and now the firewall is blocking it.

it was firewall.
thank you!!!