In the bottom-right corner of the open dialog, change the file type filter from Text Documents (*.txt) to All Files ( . ) so the hosts file becomes visible. Edit the File Scroll to the bottom of the file.
Verify that inbound and outbound ports 25734 and 25735 are open for the SolidNetWork License Manager.
After saving, clear your local cache to ensure the new settings take effect immediately. Command Prompt ipconfig /flushdns PDM Connectivity Test Tool or a simple ping [Server Name] to confirm the connection is active. Troubleshooting Host File "Blocks" If you cannot save the file even as an administrator: Antivirus Interference: Software like SentinelOne solidworks host file block fix
Replies from 127.0.0.1 (your own PC). If you see an actual IP address → the host file is not being read.
The Windows Hosts file acts as a local directory map for your computer. It translates human-readable web addresses into numerical IP addresses before your system queries the public internet. By adding specific entries to this file, you can manually route SolidWorks traffic directly to the correct server paths, bypassing network blocks and DNS filtration. Step-by-Step: SolidWorks Hosts File Fix In the bottom-right corner of the open dialog,
Press the , type cmd , and select Run as administrator for the Command Prompt.
2. Verify Your Corporate SolidNetWork License (SNL) Settings Verify that inbound and outbound ports 25734 and
By redirecting domain names to a non-existent or local IP like 127.0.0.1 (your own computer), the file prevents SOLIDWORKS from contacting its license servers, disabling automated checks and error reporting.