In the event of troubleshooting by Forcepoint support, a telnet check may be recommended, but results in the following error:

Forcepoint uses the ports located in the below articles for connectivity between its components. In the case of firewall changes or other events in the environment, these ports may mistakenly become blocked.

• Default ports for on-premises Forcepoint security solutions
• Excel Spreadsheet download version.

The Telnet tool on Windows servers can be used to test port connectivity.

Enabling Telnet

• Enabling Telnet client through Command Prompt:

  1. Open Command Prompt as Administrator.

  2. Type Dism /Online /Enable-feature /FeatureName:TelnetClient
• Enabling Telnet through Powershell.
  1. Open Powershell.
  2. Type Install-WindowsFeature -name Telnet-Client
• Enabling Telnet as a Windows Feature.
  • Windows Server 2008:
    1. Open Server Manager.
    2. Click Features.
    3. Click Add Features.
    4. Enable Telnet Client.
    5. Click Next then click Install.

• Windows Server 2012-2016:
  1. Open Server Manager.
  2. Click Add roles and features.
  3. Click Next until reaching Features.
  4. Select Telnet Client.
  5. Click Next then click Install.

• Windows Client 7, 8, and 10:
  1. Open Control Panel.
  2. Navigate to Programs and Features.
  3. Click Turn Windows features on or off.
  4. Select Telnet Client.
  5. Click OK. 

 

Using Telnet to test Ports

1. Open Command Prompt. 
2. Type telnet [domain name or IP][port]
   • Example: telnet 10.25.161.227 80
3. Check the status of the operation. 
   • If the port is not open, a message such as the following will appear:

• If the port is open, a blank screen will show up and sit idle while waiting for communication.