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A primary legitimate use is troubleshooting connection issues. If a PDM client can ping a server's IP address but not its server name—indicating a DNS resolution failure—the hosts file can map the correct IP to the server name, offering an immediate workaround until the DNS is fixed.
Scroll to the bottom of the file and add a new line with the server's IP address, followed by a Tab or space, and then the server name. Example: 192.168.1.100 YOUR_SERVER_NAME .
One highly effective, system-level solution is modifying the Windows Hosts file. This guide explains how the Windows Hosts file interacts with SolidWorks, how to use it to resolve licensing blockages, and how to safely implement the fix. Understanding the Windows Hosts File
You are here because you are seeing specific errors. Here are the top three symptoms that the Hosts file fix resolves: solidworks host file block fix
To ensure your specific licensing issue is completely resolved, tell me:
This method is typically used to prevent SolidWorks from "phoning home" to validate a license. This guide is for educational purposes. Using this fix with an unlicensed, cracked, or unauthorized version of SolidWorks is a violation of the Dassault Systèmes license agreement.
Look for lines containing words like solidworks , dassault , flexnet , or imwulb . Common blocking lines look like this: 127.0.0.1 ://solidworks.com 0.0.0.0 ://solidworks.com Example: 192
Manually map the server's IP to its name in the hosts file ( C:\Windows\System32\drivers\etc\hosts ) to bypass the DNS lookup.
: Right-click the hosts file, select Properties , and ensure Read-only is unchecked.
"SolidWorks cannot connect to the license server. The server may be down or you are not connected to the network." Understanding the Windows Hosts File You are here
Open Command Prompt as Administrator. Step 2: Type ping licensing.solidworks.com Step 3: Look at the result.
Disclaimer: This article is for educational purposes and troubleshooting legitimate software installations only. Unauthorized modification of software licensing mechanisms violates federal copyright laws.
The Windows Firewall can block the SolidWorks executable or the FlexNet licensing service ports.
: Programs like Webroot , ZoneAlarm , and SentinelOne often protect the hosts file from being modified.
Now that the block is removed, try activating SolidWorks again. Open . Navigate to Help > Licenses > Activate . Try the activation process again. Troubleshooting: What if it's not the Hosts File?