SUMMARY

If backups fail because windows client ports are blocked, this article explains how to make port reservations on windows.

ISSUE

Purpose

Set a Port reservation on Windows Server

Applies To

Appliance release 6.1+ and Windows 2000/2003 OS.  
Note, to reserve ports in windows 2008 a hotfix for windows may be required and the process differs, see https://support.microsoft.com/en-us/kb/2665809 for more information.  
Microsoft has removed the ability to reserve ephemeral ports in Windows 8, 2012 and hither OS.  If you have applications leveraging our registered ports 1743 and 1754 on these OS, you may need to contact the vendor of the application using those ports to discuss how to change them instead, Unitrends Support will be unable to assist with that process.  

Cause

Ports are being blocked on 1743 and or 1745 because they are in use by another application other than Unitrend

RESOLUTION

Open an administrator command prompt and run a netstat command

Netstat –ano | find “:1743”

Netstat –ano |find “:1745”

Check the pid and make sure that the process that is running is unitrends bpnetd or wbps

Open regedit

If the DWORD a value does not exist for the ports, then create them.

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\ReservedPorts

Add 1743-1743 and 1745-1745

Reboot the system to have the port reservation take effect. 

 Referance 
http://support.microsoft.com/kb/812873