Most "failed to connect" errors stem from infrastructure-level restrictions rather than software bugs. Common culprits include:
Troubleshooting "Dynatrace Failed to Connect to Server to Download Additional Capabilities"
If your network requires a proxy for internet access, the installer won't reach the Dynatrace server unless proxy parameters are explicitly passed during installation. Step-by-Step Troubleshooting Guide 1. Validate Basic Network Reachability