An Events-Conditions-Actions (ECA) workflow in Drupal that detects whether a visitor is coming from the campus/VPN network and displays an appropriate notice on the “/dashboard” page.
Campus VPN Check Workflow
On every request to /dashboard, this ECA model captures the visitor’s IP address and runs a simple Data Comparison against our official Global Protect IPv6 prefix (e.g., 2607:f470:…).
If the IP matches, Drupal displays a green banner—“VPN Has Been Detected”—along with the raw IP, confirming to the user they are on a secure campus/VPN connection.
If it does not match, Drupal shows a red banner—“Campus Network or VPN Not Detected”—and prints the IP for troubleshooting.
Because all logic lives in Drupal’s ECA UI (no hard-coded PHP), updating IP ranges or branching behavior is as simple as editing the Condition or Action in the browser.
Key Points
Event: Page Load → Path /dashboard
Token: Retrieve %client_ip%
Condition: IPv6 Regex Test → Route to “Is VPN” or “Is Not VPN”
Action: Show Banner + IP → Green if VPN, Red if not
Debug: Log “Dashboard Hit” for troubleshooting
