Solidworks Host File Block !link! -

SolidWorks Host File Block

6. Limitations & Risks

| Limitation | Explanation | |------------|-------------| | Easily bypassed | SolidWorks can use hardcoded IPs or DNS-over-HTTPS. | | Breaks legitimate functions | Online help, toolbox updates, 3D ContentCentral, and network licensing will fail. | | False security | Gives admin a false sense that all phoning home is blocked (many apps ignore hosts file). | | Legal risk | If blocking is used to avoid paying for licenses, it violates copyright law (DMCA, EUCD). | | Detection | Modern SolidWorks versions may detect hosts file tampering and disable features / show non-compliance warnings. |

Step 1: Locate the Hosts File

Part 7: Alternatives to the Hosts File Block

If you are trying to control SolidWorks’ network behavior for legitimate reasons, use proper tools instead of the hosts file. Solidworks Host File Block

| Goal | Tool | Hosts File Alternative? | | :--- | :--- | :--- | | Block telemetry | Windows Firewall (Outbound Rules) | No (Firewall is safer) | | Prevent auto-updates | Group Policy Editor (gpedit.msc) | Yes, but risky | | Use offline license | Request an Offline Activation file from Dassault | Never use hosts file | | Isolate software | Run in a Windows Sandbox or VM | Better isolation | SolidWorks Host File Block 6

Troubleshooting: My Legit SolidWorks Won't Activate (Host File Conflict)

Sometimes, users get the error: "SolidWorks cannot connect to the licensing server. Error -15,10." Open File Explorer

If you previously used a crack (or have antivirus software that blocks things aggressively), your HOSTS file may still contain blocks. Here is how to fix it:

  1. Open the HOSTS file as described above.
  2. Look for any line containing solidworks.com, 3ds.com, or dsxclient.
  3. Delete those lines or put a # at the beginning of the line to comment them out.
  4. Save and reboot.

This is the most common fix for "Solidworks Host File Block" causing legitimate license failures.