Solidworks Host File Block: Install [best]

Blocking SolidWorks Installation using Host File

Domains to Block: The SolidWorks Server List

Over the years, SolidWorks has used a dynamic set of domains for activation, validation, and telemetry. Based on firewall logs and community analysis, the following domains are critical to block for a completely offline installation environment. Note that this list evolves; Dassault may add new domains in service packs. solidworks host file block install

Issue 4: Very Slow Installation Due to Timeouts

Solution: This is expected. To mitigate, disconnect the network cable entirely. The installer will fail faster if there is no network interface rather than waiting for TCP timeouts on 127.0.0.1. Blocking SolidWorks Installation using Host File Domains to

Edit the File:

or if security software prevent access to it. This often results in "Permission Denied" errors or connectivity issues where the installer cannot reach the required license or download servers. SOLIDWORKS Forums Troubleshooting Hosts File Blocks Back up your current hosts file

1. Back up your current hosts file.
2. Open Notepad as Admin.
3. Paste the 10+ domains listed in this guide.
4. Flush DNS (ipconfig /flushdns).
5. Install SolidWorks offline.
6. Add the folder C:\ProgramData\FLEXnet to your antivirus exceptions.
7. Never update your SolidWorks version without temporarily unblocking the host file first (new versions need one-time validation).

To avoid host file issues during SOLIDWORKS installation: