The is a relic of a bygone era of software cracking. While technically simple—redirecting a few domains to 127.0.0.1 —its effectiveness has dwindled to near zero for modern versions (2022+).
(Note: These are examples; specific blocked domains may vary depending on the licensing method used). 4. Save and Exit Click File > Save (or Ctrl+S). Close Notepad. 5. Clear DNS Cache
: On a new line at the bottom of the file, enter the server's IP address, followed by a tab or space, and then the server name. Example: 192.168.1.100 PDM-SERVER-01
Here is a complete guide to understanding why this happens, how it affects your software, and how to fix it safely. What is a Hosts File Block?
If your hosts file is perfectly clean but SolidWorks still refuses to activate, look into these alternative network culprits:
By default, Notepad only looks for text files ( *.txt ). In the bottom right corner of the Open dialog box, change the dropdown menu from to All Files ( . ) .
When your hosts file blocks the activation servers, SolidWorks cannot verify your serial number. You will typically experience the following system behaviors:
The hosts file is located in different places depending on your operating system.
Modern Endpoint Detection and Response (EDR) platforms and antivirus software strictly monitor the integrity of the Windows hosts file. Unauthorized or automated changes to this file are a common tactic of malware (DNS hijacking). Manually editing the file may trigger high-severity security alerts within an enterprise IT network. Alternative Solutions for Enterprise Management
Change the file type dropdown menu in the bottom-right corner of the Open dialog from to All Files ( . ) .
The hosts file is a plain text file used by your operating system to map hostnames to IP addresses. It predates the Domain Name System (DNS). When you type www.google.com into your browser, your computer checks the hosts file first before asking the wider internet.
There are three primary reasons why SolidWorks validation domains end up blocked in your local hosts file: 1. Antivirus and Security Software False Positives
127.0.0.1 www.solidworks.com 127.0.0.1 solidworks.com 127.0.0.1 activation.solidworks.com 127.0.0.1 licensing.solidworks.com 127.0.0.1 swdm.solidworks.com 127.0.0.1 www.swdm.solidworks.com 127.0.0.1 solidworksnetworklicensemanager.solidworks.com 127.0.0.1 www.solidworksnetworklicensemanager.solidworks.com
SolidWorks standard term licenses, student editions, and 3DEXPERIENCE cloud-connected seats rely on periodic online handshakes to verify entitlement. If the licensing domains are blocked, the software will fail to launch, displaying errors such as "Could not obtain a license" or activation timeouts. Broken SolidWorks PDM and Shared Workgroups
Do not rely on host file blocking for license circumvention. Use it only in controlled, legitimate scenarios (e.g., stopping crash reports from leaving an air-gapped engineering PC).
Understanding the SolidWorks Hosts File Block The hosts file is a local text file used by operating systems to map hostnames to IP addresses. When a computer attempts to connect to a server, it checks the local hosts file before querying external Domain Name System (DNS) servers.
A blocked line typically looks like this: 127.0.0.1 ://solidworks.com
Ultimately, the best way to "block" SolidWorks is to pay for it. You get updates, support, cloud storage, and most importantly: peace of mind that your next design won't crash because a text file got corrupted at 2 AM.
The is a relic of a bygone era of software cracking. While technically simple—redirecting a few domains to 127.0.0.1 —its effectiveness has dwindled to near zero for modern versions (2022+).
(Note: These are examples; specific blocked domains may vary depending on the licensing method used). 4. Save and Exit Click File > Save (or Ctrl+S). Close Notepad. 5. Clear DNS Cache
: On a new line at the bottom of the file, enter the server's IP address, followed by a tab or space, and then the server name. Example: 192.168.1.100 PDM-SERVER-01
Here is a complete guide to understanding why this happens, how it affects your software, and how to fix it safely. What is a Hosts File Block?
If your hosts file is perfectly clean but SolidWorks still refuses to activate, look into these alternative network culprits: Solidworks Host File Block
By default, Notepad only looks for text files ( *.txt ). In the bottom right corner of the Open dialog box, change the dropdown menu from to All Files ( . ) .
When your hosts file blocks the activation servers, SolidWorks cannot verify your serial number. You will typically experience the following system behaviors:
The hosts file is located in different places depending on your operating system.
Modern Endpoint Detection and Response (EDR) platforms and antivirus software strictly monitor the integrity of the Windows hosts file. Unauthorized or automated changes to this file are a common tactic of malware (DNS hijacking). Manually editing the file may trigger high-severity security alerts within an enterprise IT network. Alternative Solutions for Enterprise Management The is a relic of a bygone era of software cracking
Change the file type dropdown menu in the bottom-right corner of the Open dialog from to All Files ( . ) .
The hosts file is a plain text file used by your operating system to map hostnames to IP addresses. It predates the Domain Name System (DNS). When you type www.google.com into your browser, your computer checks the hosts file first before asking the wider internet.
There are three primary reasons why SolidWorks validation domains end up blocked in your local hosts file: 1. Antivirus and Security Software False Positives
127.0.0.1 www.solidworks.com 127.0.0.1 solidworks.com 127.0.0.1 activation.solidworks.com 127.0.0.1 licensing.solidworks.com 127.0.0.1 swdm.solidworks.com 127.0.0.1 www.swdm.solidworks.com 127.0.0.1 solidworksnetworklicensemanager.solidworks.com 127.0.0.1 www.solidworksnetworklicensemanager.solidworks.com Use it only in controlled
SolidWorks standard term licenses, student editions, and 3DEXPERIENCE cloud-connected seats rely on periodic online handshakes to verify entitlement. If the licensing domains are blocked, the software will fail to launch, displaying errors such as "Could not obtain a license" or activation timeouts. Broken SolidWorks PDM and Shared Workgroups
Do not rely on host file blocking for license circumvention. Use it only in controlled, legitimate scenarios (e.g., stopping crash reports from leaving an air-gapped engineering PC).
Understanding the SolidWorks Hosts File Block The hosts file is a local text file used by operating systems to map hostnames to IP addresses. When a computer attempts to connect to a server, it checks the local hosts file before querying external Domain Name System (DNS) servers.
A blocked line typically looks like this: 127.0.0.1 ://solidworks.com
Ultimately, the best way to "block" SolidWorks is to pay for it. You get updates, support, cloud storage, and most importantly: peace of mind that your next design won't crash because a text file got corrupted at 2 AM.