Summary
Some applications fail to install on Workspot VMs when required files cannot be downloaded from vendor Content Delivery Networks (CDNs). This is typically caused by missing proxy settings, blocked URLs, or restricted outbound connectivity.
Issue
Online installers (e.g., Microsoft 365, Adobe Creative Cloud, Zoom, Webex) may fail because the VM cannot reach the vendor CDN or update servers.
Typical error: “Unable to download required installation files from the CDN. Check your internet or proxy configuration.”
Cause
Missing or incorrect proxy configuration
Firewall/proxy blocking CDN URLs
DNS or general connectivity issues
Resolution
Configure or correct proxy and network settings:
Open Control Panel → Internet Options → Connections → LAN Settings
Enable the Automatic configuration script if required
Enter the correct proxy/PAC file (e.g.,
http://proxy.company.com/proxy.pac)Apply settings and retry installation
Verify connectivity, and the installation should complete successfully.
Verification
Launch the app to confirm it works
Test CDN access (
nslookup/pingto vendor URLs)Review installer logs for successful file downloads
Prevention
Whitelist vendor CDN/update URLs
Keep proxy/PAC configurations consistent
Periodically validate outbound connectivity
Use offline installers for restricted environments