Solidworks Host File Block Install Jun 2026
127.0.0.1 im.solidworks.com 127.0.0.1 crashdiag.solidworks.com 127.0.0.1 performance.solidworks.com 127.0.0.1 license.solidworks.com 127.0.0.1 activation.solidworks.com
If your installation is blocked because it cannot reach a license or PDM server, you can manually add the server to your hosts file. How to Fix Blank Installation Manager Screen
If you are using a , ensure your host file isn't accidentally blocking the server communication ports. The default ports are 25734 and 25735 . If the installation still fails, you may need to add an exception for these in your Firewall settings rather than the hosts file. 🔄 What if it's still blocked? If the host file is clean but the install won't budge:
| Pros | Cons | |------|------| | Free, no extra software | Easily bypassed by some app versions | | System-wide, affects all users | Requires admin rights to edit | | Works without a firewall service | Can cause installer timeouts | | Permanent until manually removed | No granular control (all-or-nothing) |
: The Installation Manager may hang at a loading bar if it cannot reach the activation or PDM servers due to a DNS resolution failure that a manual hosts entry would otherwise fix. SOLIDWORKS Forums 3. Resolution and Manual Configuration solidworks host file block install
If you are encountering a "host file block" or a blank screen during a SOLIDWORKS installation, you are likely facing a security conflict where Windows or third-party software is preventing the installer from writing necessary data or accessing server addresses.
: If you are installing from a network license or PDM server and the DNS is failing, add a new line at the bottom: [Server IP Address] [TAB] [Server Name] .
Understanding how to identify, modify, and resolve these hosts file conflicts ensures a smooth installation process. Understanding the Role of the Hosts File
Modifying the hosts file is a simple and effective way to block the installation of SolidWorks. This method can be used to control access to specific software or websites. However, it is essential to note that this method can be bypassed by using alternative installation methods or by modifying the hosts file itself. If the installation still fails, you may need
: Downloading necessary Microsoft components.
In the file name dialogue box, change the dropdown filter from "Text Documents (*.txt)" to . Navigate to C:\Windows\System32\drivers\etc\ . Select the file named hosts and click Open . 4. Add the Block or Redirect Rules
If you are experiencing a specific error code during installation, I can provide more targeted troubleshooting steps if you share it. Share public link
Overcoming SOLIDWORKS Installation Blocks via the Host File SOLIDWORKS installations often stall or fail due to network validation errors, which are frequently caused by improper configurations in your Windows hosts file. This comprehensive technical guide explains how to identify, troubleshoot, and resolve host file blocks to ensure a seamless SOLIDWORKS installation. Understanding the Windows Hosts File SOLIDWORKS Forums 3
: By mapping the server name to a specific IP, you ensure the installer finds the SolidNetWork License (SNL) Manager without relying on potentially slow or misconfigured network DNS.
If you want to allow the installation of SolidWorks, simply remove the entries you added to the hosts file.
Block all traffic to/from Dassault Systèmes ASN ranges at the network level.