When I connect to the VDE I get a connection timeout with or without a black screen. What do I do?

Error 1: When I connect, I get a black screen and can’t see anything.

Error 2: The connection to the remote computer timed out Omnissa Horizon client.

Error 3: Timeout was reached.

Error 4: Connection to remote computer has ended.

Solution: this indicates that there is a firewall on your machine or network preventing PCoIP traffic between your machine and Horizon’s Connection Broker Server. You will need to unblock port 4172 TCP and UDP outbound from your machine to the following IP Addresses of our Horizon Connection Servers. Please see Omnissa’s KB for tech details.

• 141.211.217.181
• 141.211.217.182
• 141.211.217.185
• 141.211.7.224
• 141.211.7.225
• 141.211.7.226

These IP addresses may update periodically, but we try to keep them the same whenever possible. The University of Michigan owns all of 141.211.0.0/16, so if this IP range can be allowed, it will be more future-proof. You can review a list of what networks we own.