The Windows hosts file acts as a local DNS override. To modify it for SOLIDWORKS server resolution: Run Notepad as Administrator
To understand why and how administrators or advanced users modify the hosts file to prevent SolidWorks from communicating with specific external servers.
Understanding and Fixing the SolidWorks Hosts File Block If your SolidWorks software suddenly stops launching, throws licensing errors, or freezes on startup, the issue might be hidden inside a tiny Windows system file called the .
The hosts file is a plain text file used by operating systems (Windows, macOS, Linux) to map hostnames (like activate.solidworks.com ) to IP addresses. It operates locally, taking precedence over DNS servers.
Note: If both the Archive and Database servers are on the same machine, only one line is required. Use a space between the IP and the name. www.javelin-tech.com How to Edit the File GoEngineer Open Notepad as Admin : Search for in the Start Menu, right-click it, and select Run as Administrator Navigate to File : In Notepad, go to File > Open and navigate to: C:\Windows\System32\drivers\etc\ Change File Type : Change the dropdown menu from Text Documents (*.txt) All Files ( to see the "hosts" file. Edit and Save : Scroll to the bottom, past any lines starting with , add your required server entry, and save the file. Why Use a Hosts File Block? Resolve DNS Issues
To lift the block, simply . Alternatively, you can add a hashtag ( # ) to the very beginning of the line. The hashtag tells Windows to treat the line as a comment and ignore it. Step 4: Save and Flush DNS Click File > Save in Notepad, then close the program.
Discussions surrounding the "SolidWorks Host File Block" often revolve around IT workarounds for license activation issues or PDM connectivity problems, rather than a single "product review."
Network environments require ports 25734 and 25735 to be open. Ensure your router or corporate firewall does not block these ports on your local subnet. To help resolve this layout quickly, let me know:
In the context of SolidWorks, "host file blocking" refers to the practice of redirecting SolidWorks license validation and telemetry domains to an invalid or loopback address (e.g., 127.0.0.1 ). The primary stated goals are:
If the file is clean but it still fails, try flushing your DNS cache by typing ipconfig /flushdns in the Command Prompt.
Note: Dassault Systèmes frequently changes their server architecture. A list valid today may be obsolete tomorrow.
ND300
| NO | Name | Version | Updated | Download |
|---|---|---|---|---|
| 1 | ND300_QIG | Ver1.0 | 2019-07-16 |
|
| 2 | ND300_datesheet | Ver1.0 | 2026-01-20 |
|
| 3 | ND300_Firmware | V3.1.1-B20170224 | 2018-12-18 |
|
Please confirm that you have chosen the correct downloading version, wrong firmware update may cause damage to your device.
The Windows hosts file acts as a local DNS override. To modify it for SOLIDWORKS server resolution: Run Notepad as Administrator
To understand why and how administrators or advanced users modify the hosts file to prevent SolidWorks from communicating with specific external servers.
Understanding and Fixing the SolidWorks Hosts File Block If your SolidWorks software suddenly stops launching, throws licensing errors, or freezes on startup, the issue might be hidden inside a tiny Windows system file called the .
The hosts file is a plain text file used by operating systems (Windows, macOS, Linux) to map hostnames (like activate.solidworks.com ) to IP addresses. It operates locally, taking precedence over DNS servers.
Note: If both the Archive and Database servers are on the same machine, only one line is required. Use a space between the IP and the name. www.javelin-tech.com How to Edit the File GoEngineer Open Notepad as Admin : Search for in the Start Menu, right-click it, and select Run as Administrator Navigate to File : In Notepad, go to File > Open and navigate to: C:\Windows\System32\drivers\etc\ Change File Type : Change the dropdown menu from Text Documents (*.txt) All Files ( to see the "hosts" file. Edit and Save : Scroll to the bottom, past any lines starting with , add your required server entry, and save the file. Why Use a Hosts File Block? Resolve DNS Issues
To lift the block, simply . Alternatively, you can add a hashtag ( # ) to the very beginning of the line. The hashtag tells Windows to treat the line as a comment and ignore it. Step 4: Save and Flush DNS Click File > Save in Notepad, then close the program.
Discussions surrounding the "SolidWorks Host File Block" often revolve around IT workarounds for license activation issues or PDM connectivity problems, rather than a single "product review."
Network environments require ports 25734 and 25735 to be open. Ensure your router or corporate firewall does not block these ports on your local subnet. To help resolve this layout quickly, let me know:
In the context of SolidWorks, "host file blocking" refers to the practice of redirecting SolidWorks license validation and telemetry domains to an invalid or loopback address (e.g., 127.0.0.1 ). The primary stated goals are:
If the file is clean but it still fails, try flushing your DNS cache by typing ipconfig /flushdns in the Command Prompt.
Note: Dassault Systèmes frequently changes their server architecture. A list valid today may be obsolete tomorrow.