Host File Block — Solidworks

Are you operating behind a strict or proxy? Share public link

The process for editing the Hosts file is the same whether you're doing it for a legitimate network fix or for license blocking.

Disabling validation can cause SolidWorks to enter "license not found" mode after a grace period (e.g., 30 days). Periodic online checks are required for most network and standalone licenses. Solidworks Host File Block

Instead of using the hosts file to manage traffic, use the Windows Defender Firewall. Create explicit "Inbound" and "Outbound" rules for the SolidWorks executable files or the specific ports used by your license manager (typically ports 25734 and 25735 ).

This public link is valid for 7 days and shares a thread, including any personal information you added. This link or copies made by others cannot be deleted. If you share with third parties, their policies apply. Can’t copy the link right now. Try again later. Are you operating behind a strict or proxy

Automatic update checkers constantly ping deployment servers to look for new service packs. In enterprise environments where software versions must remain uniform across all engineering workstations, blocking the update domains ensures users do not accidentally install disruptive, unapproved patches. Common Domains Targeted in SolidWorks Blocks

: This fix works best if your server has a static IP. If the server's IP changes, you will need to update this file again. Periodic online checks are required for most network

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

If you have searched for the term you are likely standing at a crossroads. You may be troubleshooting a licensing error, or you may be attempting to use the software without a proper license.

For individuals and businesses, the path forward is clear. The availability of low-cost, legal licensing options for SolidWorks, combined with a range of powerful and free alternatives, means that there is no longer any justifiable reason to resort to piracy. By choosing a compliant solution, you not only protect yourself from legal action but also ensure you have access to full technical support, regular updates, and a secure, reliable design environment. Respecting software licensing is not just a legal obligation; it is the foundation of a sustainable and professional engineering ecosystem.