After adding a Detection server to the Enforce User Interface (UI) it shows "Unknown"

Products

• Data Loss Prevention Enforce

Issue/Introduction

After adding a Detection server to the Enforce User Interface (UI) it shows "Unknown" Detection server shows "Unknown" in the Enforce User Interface (UI).

Cause

This could be caused because port 8100 is currently blocked on the Detection server. If you perform a netstat -ano inside a Command (CMD) prompt window you should see port 8100 in a listening status.
 

  TCP    0.0.0.0:8100           0.0.0.0:0              LISTENING       1212

NOTE: You may use netstat -ano > C:\netstat.txt to output the results to a text file.

Resolution

Check and verify Windows Firewall is either disabled or an exception is added for port 8100.  You can also use telnet to verify the connection from Enforce to the Detection server and make sure you can connect to it. 

telnet <detection server dns name or IP> 8100

Enforce server communicates to all detection servers over port 8100.

NOTE: Enforce and Detection server services may need to be restarted in order to reestablished communication with the Detection server.