# SolidWorks Block List - Added on YYYY-MM-DD # Licensing 127.0.0.1 activation.solidworks.com 127.0.0.1 license.solidworks.com
The hosts file acts as a local "address book" that Windows checks before asking a DNS server. Open Notepad as Administrator : Search for , right-click it, and select Run as Administrator Open the File : In Notepad, go to File > Open . Navigate to the path: C:\Windows\System32\drivers\etc\ solidworks host file block install
Using a host file block or redirect is a powerful troubleshooting tool for SOLIDWORKS users. It allows for a more controlled installation environment, especially when dealing with stubborn licensing hurdles. However, it should be treated as a temporary fix or a last resort, as long-term stability is best achieved through proper DNS configuration and network firewall rules. # SolidWorks Block List - Added on YYYY-MM-DD
Blocking SolidWorks installations or license activation via the hosts file is a method some administrators use to prevent unauthorized activation or to stop SolidWorks from contacting specific network license servers or online activation servers. Below is a concise, practical overview covering what it is, why and when it’s used, how it’s done, the risks and limitations, and safer alternatives. It allows for a more controlled installation environment,
: Save the file. Then, open Command Prompt and type ipconfig /flushdns to clear your cache.
Note: You must change the file type filter in the bottom-right of the Open dialog from "Text Documents ( "All Files ( to see the hosts file.* Add Server Info