Solidworks Host File Block Install Jun 2026

If the "SolidWorks host file block install" method does not solve your licensing issue, you may need to check your firewall settings, reinstall the SolidNetwork License Manager, or contact your IT department to ensure the necessary ports ( ) are open. If you'd like, I can: Show you how to check if a port is open (25734/25735). Provide instructions on reverting the hosts file changes . List the common firewall settings to check for SOLIDWORKS.

On machines with strict firewalls, the installer may hang trying to verify credentials. Blocking the check can allow the local install process to complete.

Firewalls frequently block outbound connections initiated by new software installers. solidworks host file block install

This is a necessary skill for any IT admin managing SolidWorks deployments in restricted environments. It is not a "fix-all" for every installation error, but for connectivity-related stalls, it works 100% of the time. Just remember to undo the changes post-install to ensure your license validation remains healthy.

Even after saving the file, Windows may temporarily store the old blocked routes in its local network cache. You must clear this cache to apply the changes immediately. If the "SolidWorks host file block install" method

The firewall might block the SOLIDWORKS Installation Manager ( sldim.exe ). Open the and navigate to System and Security .

Editing the Windows hosts file to block SolidWorks domains is a time-tested, lightweight approach to prevent the software from contacting external servers during or after installation. While it is not foolproof against modern anti-tamper measures, it serves as an excellent first line of defense for users who require complete offline control over their SolidWorks environment. Always ensure you are in compliance with licensing terms, and remember that the hosts file is a tool for legitimate network management—not a method for software piracy. List the common firewall settings to check for SOLIDWORKS

: If a line begins with an IP followed by a SOLIDWORKS-related URL, delete that line or add a # at the start of it to "comment it out".

Delete the entire line for any entry that blocks these domains. Alternatively, place a hashtag ( # ) at the very beginning of the line. The hashtag converts the line into a comment, forcing Windows to ignore the block without permanently deleting the data. Step 4: Save the Changes Click and choose Save (or press Ctrl + S ). Close Notepad. Flushing the DNS Cache

Select the file named (it will not have a file extension) and click Open . Step 3: Identify and Remove SolidWorks Blocks