In large enterprise environments, CAD managers strictly control software versioning to maintain file compatibility across teams. Automatic update prompts or background downloads can disrupt workflows or accidentally upgrade a user's local file format. Blocking update servers ensures that software deployments remain uniform and centrally managed. 3. Restricting In-App Web Services
You should see a message confirming that the DNS Resolver Cache was successfully flushed. Best Practices for IT Administrators
While editing the hosts file is a common fix, it is important to be aware of the following:
Flush DNS cache:
It is worth noting that in SolidWorks, a "Block" is also a standard CAD feature used to group sketch entities.
SolidWorks relies on network communication to validate licenses, activate products, and run background services. Sometimes, system administrators or security software modify the Windows hosts file to block specific outbound connections. This guide explains why the happens, how it impacts your software, and how to fix it. Understanding the Windows Hosts File
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Aggressive anti-piracy tools, corporate firewalls, or third-party antivirus suites sometimes flag licensing telemetry as suspicious. To prevent what they perceive as unauthorized data outbound transfers, they automatically write blocking rules into your hosts file. 2. IT Infrastructure Changes
SolidWorks standard term licenses, student editions, and 3DEXPERIENCE cloud-connected seats rely on periodic online handshakes to verify entitlement. If the licensing domains are blocked, the software will fail to launch, displaying errors such as "Could not obtain a license" or activation timeouts. Broken SolidWorks PDM and Shared Workgroups
To block SolidWorks from reaching specific servers, you map the server's domain name to your local machine (IP ). Common addresses targeted include: 127.0.0.1 activation.solidworks.com 127.0.0.1 im-node1.solidworks.com 127.0.0.1 im-node2.solidworks.com 127.0.0.1 sldworks-entitlements.solidworks.com integrated MySolidWorks components
| Domain | Primary Association | Typical Service Purpose | | :--- | :--- | :--- | | im.solidworks.com | License Management & Installation | Activation checks, license validation, user authentication. | | crashdiag.solidworks.com | Crash Reporting | Sends software crash and error diagnostic data to Dassault. | | performance.solidworks.com | Performance Analytics | Transmits usage metrics and performance statistics back to Dassault. | | www.solidworks.com | Web Services | The main company web portal, can be a fallback for some checks. | | licenses.solidworks.com | Dedicated License Verification | Directly tied to license authentication and online licensing. | | activate.solidworks.com | Activation Process | Handles the license activation and deactivation workflow. | | backupactivate.solidworks.com | Redundant Activation Service | An alternate activation server, often used if the primary is unreachable. | | files.solidworks.com | Download Services | Used by the Installation Manager to download updates and components. | | help.solidworks.com | Online Help & Documentation | Accesses integrated online help guides and resources. | | blog.solidworks.com | Telemetry & Content | Could host web-based content and additional telemetry calls. | | sw.www.solidworks.com.edgekey.net | CDN for Web Assets | Part of Akamai's CDN for delivering web content and assets. |
Are you running any software like CrowdStrike, SentinelOne, or Windows Defender GPOs?
| Issue | Legitimate Solution | | :--- | :--- | | | Properly Activate Your License: Do not try to block validation. Open SolidWorks, go to Help > Deactivate Licenses , then reactivate it to refresh your activation status. | | Need to move a license to a new computer. | Use the Transfer License Feature: Go to Help > Transfer Licenses to properly deactivate the license on the old machine before reactivating it on the new one. | | SolidWorks is starting slowly. | Check SOLIDWORKS Rx: Use the built-in SOLIDWORKS Rx tool to diagnose and troubleshoot performance issues. | | Concerned about sent diagnostic data. | Disable Usage Statistics: Within SolidWorks, go to Tools > Options > General . Uncheck the options for "Collect usage statistics to improve product experience" and "Check for updates automatically" . | could you tell me:
Features such as the 3DEXPERIENCE Marketplace, integrated MySolidWorks components, and online standard parts libraries will cease to load or function correctly.
To help narrow down your network configuration, could you tell me: