AGENT => Failed to send Prolog

Dear Team,

I am facing issue server not getting the client information when I installed the windows agent:

OCS Server: centos 7

Windows Client: windows 10 and windows 8.1

below are the client error:

Starting OCS Inventory NG Agent on Tuesday, June 20, 2017 11:43:46.
AGENT => Running OCS Inventory NG Agent Version 2.3.0.0
AGENT => Using OCS Inventory NG FrameWork Version 2.3.0.0
AGENT => Loading plug-in(s)
AGENT => Using network connection with Communication Server
AGENT => Using Communication Provider <OCS Inventory NG cURL Communication Provider> Version <2.3.0.0>
AGENT => Sending Prolog
ERROR *** AGENT => Failed to send Prolog <HTTP Status Code #404>
AGENT => Unloading communication provider
AGENT => Unloading plug-in(s)
AGENT => Execution duration: 00:00:01.