Solidworks Host File Block Fix !full! Jun 2026

Choose and enter 25734, 25735 into the Specific local ports box.

Note: Ensure there is a space or a tab between the numbers and the text, and do not include any # symbols at the beginning of these lines, as # tells Windows to ignore the line. Step 4: Save and Close Click , then select Save (or press Ctrl + S ). Close Notepad. Step 5: Flush Your DNS Cache

Below is the comprehensive guide to diagnostic procedures, file permission management, and step-by-step resolution scripts. Why SolidWorks Experiences Host Block Errors

To ensure this solution fits your setup, please share you see, your SolidWorks version , and if this is a standalone or network license . Share public link solidworks host file block fix

: At the bottom of the file, add a new line with the server's IP address, a tab or space, and then the server name. 192.168.1.50 MyPDMSERVER Save and Flush DNS : Save the file, then open a Command Prompt and type ipconfig /flushdns to apply the changes immediately. GoEngineer 2. Resolving "Access Denied" or Blocked Changes If you cannot save the file or it keeps resetting, check these common blocks: Antivirus Interference : Security software like SentinelOne often locks the file to prevent malware.

If resetting your hosts file does not instantly resolve your SolidWorks launch errors, try these additional troubleshooting steps: Check the SolidWorks Licensing Service

If the above methods don't resolve the issue, try the following: Choose and enter 25734, 25735 into the Specific

He right-clicked hosts and opened it with Notepad, but he did it with Administrative privileges—the "skeleton key" of the Windows world.

Navigate to the SolidWorks Flexnet server folder, right-click server remove.bat , run as administrator, and then run server install.bat to reset the licensing daemon.

To fix the SOLIDWORKS host file block issue, follow these steps: Close Notepad

: Windows spending minutes attempting to resolve an unreachable or blocked licensing domain before finally timing out. Step-by-Step Guide to Fix the SolidWorks Hosts File

Navigate to the following path: C:\Windows\System32\drivers\etc Locate the file named . Step 2: Editing the Hosts File to Remove Blocks

Instead of editing the Hosts file, whitelist the following URLs in your corporate firewall:

The SOLIDWORKS host file block issue can occur due to various reasons, including:

Antivirus "Ransomware Protection"