Navigation:  ENERCALC SEL > Installation, Activation, Updating & Syncing > Network Communication Requirements

Last revised: Wednesday, January 14, 2026 at 11:24 AM

What outbound and inbound network calls does SEL make when launched and during normal operation?

 

ENERCALC SEL communicates with external servers for three primary purposes:

1.License validation/activation (required for software operation)

2.Optional cloud project storage (user-initiated)

3.Optional cloud settings sync (user preferences)

 

No automatic telemetry, crash reporting, or background data collection occurs. All calculations are performed locally.

 

 

1. PURPOSE OF EACH CONNECTION

 

Note that the "CloudRegistry" is not used except when using our cloud-based app. This feature is a SQL-based clone of the Windows HKCU registry items we store when running as a desktop. It allows us to use the same settings management in the cloud as we do on the desktop.

 

Cloud Project Sync is only used if your user chooses to use "Hosted Storage" (projects are stored on our AWS S3) - not required and can be disabled at the company level.

 

 

2. TYPES OF DATA TRANSMITTED OR RECEIVED

 

License/Authentication Data (Transmitted):

•Customer license key (15-character activation code)

•Customer KW number (internal customer ID)

•Windows login username

•Computer name

•Graphics adapter identifier (used to keep the user instance unique)

•Monitor count

•Windows version string

•ENERCALC software version number

 

License/Authentication Data (Received):

•Encrypted activation token (150-character encrypted string)

•License permissions (module access flags)

•Seat count and expiration dates

•Subscription status

 

Project Data (Optional - Cloud Sync):

•Project files (binary .EC6 files, gzip-compressed)

•Project metadata: name, creation date, computer name, notes

•Shared files: logos, seals, support documents

 

Software Updates:

•Received only: Current available version number (string comparison)

•No automatic downloads - user must manually download updates

 

Error Reporting / Telemetry:

•None - ENERCALC does not transmit error reports, crash dumps, or usage telemetry

 

Configuration/Resources Downloaded:

•User settings (if cloud registry enabled)

 

 

3. ENDPOINTS AND PROTOCOLS

 

Activation Servers (HTTPS/443):

 

 

Cloud Storage:

•AWS S3 (presigned URLs for large file transfers)

•All traffic via HTTPS/443

 

Protocol Details:

•Protocol: HTTPS (TLS/SSL)

•Port: 443 (standard HTTPS)

•Authentication: HMAC-SHA256 request signing via custom Signature1 header

•No UDP, TCP raw sockets, or non-standard ports

 

API Base Path:

•All API calls go to: https://{server}/CRM/{endpoint}

 

 

4. FREQUENCY AND TIMING

 

 

No background polling or heartbeat connections - all connections are either startup-related or explicitly user-initiated.

 

 

5. USER PROJECT DATA TRANSMISSION

 

What IS Transmitted (when cloud sync is used):

•Project files (.EC6 binary format, gzip-compressed)

•Project name and notes

•Computer name (which machine created/modified the file)

•Creation/modification timestamps

•Project status (in use, archived)

 

What is NOT Transmitted:

•Calculation inputs/outputs (calculated locally only)

•Design data (remains in project file, not parsed by server)

•Engineering calculations (performed locally, never sent to server)

•Source drawings or CAD files

 

User Control:

•Cloud sync is entirely optional

•Users can work 100% offline with local project files

•Cloud storage must be explicitly enabled and used

 

 

6. FIREWALL CONFIGURATION REQUIREMENTS

 

Required Domains (whitelist):

•enercalc.net

•enercalcwest.com

•enercalcmidwest.com

•enercalcindia.com

•enercloudeurope.com

•enercalcpnw.com

•enercalceast.com

•enercalc.com

•*.amazonaws.com (for S3 cloud storage, if used)

 

Port:

•443 (HTTPS) - Outbound only

 

Protocol:

•HTTPS/TLS only

 

 

7. SECURITY FEATURES

 

 

 

8. WHAT ENERCALC DOES NOT DO

 

•No telemetry - No usage analytics or behavioral tracking

•No crash reporting - No automatic error transmission

•No background connections - No polling or heartbeat

•No automatic updates - Version check only, manual download required

•No third-party integrations - No connection to analytics services

•No cookies or web tracking - Desktop application only

•No access to other applications - Isolated to ENERCALC files only

 

 

9. OPTIONAL FEATURES (CAN BE DISABLED)

 

These features can be disabled for highest-security environments:

 

1.Auto-update check - Disable in Settings > General Settings > "Automatically check for updates at program startup"

2.Cloud storage - Don't use cloud sync (use local files only) -can be disabled at the account level (ask support)

3.Cloud registry - Don't enable cloud settings sync

 

With these disabled, the only network traffic is the initial license activation/validation, receiving customer information from our CRM (re: name, license status etc), and deactivation of the license upon application close.