Block | Solidworks Host File

) try to reach out to external URLs for updates or usage tracking. In high-security environments or systems with strict firewalls, these attempts can cause the software to "stutter." By "blocking" these URLs (redirecting them to ), you keep the traffic local and the software snappy. How to Do It (The Safe Way) To edit the file, you’ll need to find it at: C:\Windows\System32\drivers\etc\hosts The Steps: Run as Admin:

Aggressive firewalls, anti-malware tools, or third-party network monitors sometimes flag outbound licensing requests as suspicious traffic. To protect your system, they may automatically write block rules directly into your hosts file. 2. Leftovers from Software Cleanup Tools

Think of your Windows Hosts file as a private address book for your computer. Before your PC asks a DNS server (the internet's phone book) where a website or server is, it checks this local file first. If you put an entry in there, your computer takes it as gospel. Why "Block" or Redirect for SolidWorks?

You can add the following to the hosts file to test: 192.168.1.50 ServerName (Using your actual server IP and Name). Summary of Fixes Remove solidworks entries in the hosts file. "Cannot Write" Error Turn off Antivirus temporarily; check file permissions. PDM Connection Issues Manually add the server IP to the hosts file. Solidworks Host File Block

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

: In Notepad, go to File > Open . Navigate to the following path: C:\Windows\System32\drivers\etc\

127.0.0.1 localhost 127.0.0.1 www.solidworks.com 127.0.0.1 solidworks.com 127.0.0.1 register.solidworks.com 127.0.0.1 activation.solidworks.com 127.0.0.1 license.solidworks.com 127.0.0.1 solidworks.licensing.com 127.0.0.1 dsxclient.dataservices.solidworks.com 127.0.0.1 events.solidworks.com 127.0.0.1 swym.3dexperience.solidworks.com ) try to reach out to external URLs

In collaborative engineering environments utilizing SolidWorks PDM (Product Data Management), local host file errors can accidentally intercept server communication. If a user incorrectly blocks a broad domain or an IP address associated with the internal PDM Archive or Database server, they will lose access to the central file vault. Security Software Flags

: If you get a "permission denied" error, you did not run Notepad as an Administrator.

The symptoms of the SolidWorks Host File Block issue can vary, but common indicators include: To protect your system, they may automatically write

Add the server's IP address, followed by a tab or space, and then the server hostname to establish the connection mapping. 3. "No Internet" Activation Workaround

C:\Windows\System32\drivers\etc\hosts

, but your network is having trouble resolving that name, you can "hardcode" the IP address in your hosts file. This bypasses the network lag and connects you instantly. Blocking "Telemetry" or Update Checks: Sometimes, background processes (like sldworks.exe

Future SolidWorks updates might change the servers they use, requiring you to update the hosts file again. Summary Checklist Run Notepad as Admin Necessary for saving changes to system32 . Add 127.0.0.1 entries Blocks SolidWorks activation domains. Flush DNS Applies changes immediately. Check Flexnet Services Resolves "Vendor Daemon" errors.

If you are trying to control SolidWorks’ network behavior for legitimate reasons, use proper tools instead of the hosts file.