The hosts file ( C:\Windows\System32\drivers\etc\hosts ) maps hostnames to IP addresses.

If you cannot afford SolidWorks at all, Onshape (owned by the same company) has a free tier that runs in your browser. No host file blocking required.

The SNL Manager communicates via ports 25734 and 25735 . If the host file doesn't point to the correct server, you’ll see "Could not obtain a license for SOLIDWORKS".

The SolidWorks Installation Manager will fail to check for updates or download required files.

Discussions surrounding the "SolidWorks Host File Block" often revolve around IT workarounds for license activation issues or PDM connectivity problems, rather than a single "product review."

When client workstations cannot resolve the PDM server name due to DNS issues, editing the hosts file enables direct communication. The Catch: Experts warn this should be a

: If your DNS (Domain Name System) fails to translate a server name into an IP address, PDM will fail to connect.