A test to reach a specific port on
Problem
A test for connectivity to a particular port at a given FQDN fails with the message Port port-number Connection timed out.
![Image of Hybrid Linked Mode port reachability test error message showing a failure to reach the on-premises vCenter server at port 443.](images/GUID-7BF864CF-27F7-4BB6-AF2F-51FF8DFD924E-low.png)
Cause
Potential causes of this failure could be:
- A firewall rule in the cloud SDDC or the on-premises data center might be blocking access to the port.
- The remote system with the given FQDN is powered-off.
Solution
- Check your firewall rules set in the VMware Cloud Console to ensure that they are not blocking access to the specified port.
- Check your on-premises firewall rules to ensure that they are not blocking access to the specific port.
- Check that the remote system being pinged is powered-on and functioning, and power on or restart if necessary.