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Solidworks Host File Block — Fix __full__

: Ensure TCP ports 25734 and 25735 are open for both Inbound and Outbound rules on both the server and client machines.

The location of the host file varies depending on the operating system:

At the bottom of the file, add the following lines. Each line follows the pattern: [IP address to redirect to] [domain name to block] solidworks host file block fix

Press . You should see a message stating: "Successfully flushed the DNS Resolver Cache." Troubleshooting Potential Errors Windows Will Not Let You Save the File

This public link is valid for 7 days and shares a thread, including any personal information you added. This link or copies made by others cannot be deleted. If you share with third parties, their policies apply. Can’t copy the link right now. Try again later. : Ensure TCP ports 25734 and 25735 are

The hosts file is a plain text file that maps hostnames to IP addresses. By adding lines like: 127.0.0.1 license.solidworks.com ...you are telling your computer to "look" for the SolidWorks license server on your own hard drive instead of on the internet.

While useful for temporary troubleshooting, the hosts file block fix for license validation is fragile and unsustainable. For critical design work, a licensed version of SOLIDWORKS is essential for legal compliance, security, and accessing support and updates. If you have a valid license and are experiencing persistent activation problems, the most reliable solution is to contact official SOLIDWORKS support. You should see a message stating: "Successfully flushed

The SOLIDWORKS host file block issue can occur due to various reasons, including:

: In the SolidNetWork License Manager , ensure the box "A firewall is in use on this server" is checked so it uses a static port for communication.

Manually map the server's IP to its name in the hosts file ( C:\Windows\System32\drivers\etc\hosts ) to bypass the DNS lookup.

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