SOLIDWORKS PDM – Test Port Communication using Windows Telnet feature

Article by GoEngineer on Jul 30, 2020


Windows Server, Windows 7, and Windows 8 have built-in firewalls activated by default. These can restrict network access to applications requiring connections over the TCP/IP interface. You can test port communication by using Windows Telnet client feature in a command prompt to check communication is working properly. For step-by-step instructions on opening ports for client and server communication, please see the section ‘Opening ports for Client/Server Communication’ in the SOLIDWORKS PDM Installation Guide. This section is located in Chapter 5 – Installing SOLIDWORKS PDM. This table summarizes the ports that must be reachable. You open the firewall ports on the listening/receiving side.

  • Telnet Test

1. Activate the Windows Telnet client on the client machine (start > search ‘Turn Windows features on or off’)
2. Check ‘Telnet Client’ then hit OK.

Activate the Windows Telnet feature SOLIDWORKS PDM

3. To telnet into the server port open a command prompt on the client (Start > Run > type cmd and hit enter)
4. Type “telnet ” (without the quotation marks or arrows) and hit enter. See table above for specific server port numbers to test.
5. If the screen comes back with a blinking cursor the telnet succeeded.

If the screen comes back with a blinking cursor the telnet succeeded SOLIDWORKS PDM

6. If the telnet failed try substituting the with the IP address of the server.
7. If the telnet still fails there is a TCP/IP problem between the client and the server and it should be investigated by the network administrator. It is possible that a firewall could be blocking communication on that specific port.


About GoEngineer

GoEngineer delivers software, technology and expertise that enable companies to unlock design innovation and deliver better products faster. With more than 35 years' experience and tens of thousands of customers in high tech, medical, machine design, energy and other industries, GoEngineer provides best-in-class design solutions from SOLIDWORKS CAD, Stratasys 3D printing, Creaform & Artec 3D scanning, CAMWorks, PLM, and more

View all posts by GoEngineer