Unable to connect to the remote server

 Problem

An agent fails and the following error message is logged:

Unable to connect to the remote server

System.Net.WebException: Unable to connect to the remote server ---> System.Net.Sockets.SocketException: A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond <IP Address>:<Port>
at System.Net.Sockets.Socket.DoConnect(EndPoint endPointSnapshot, SocketAddress socketAddress)
at System.Net.ServicePoint.ConnectSocketInternal(Boolean connectFailure, Socket s4, Socket s6, Socket& socket, IPAddress& address, ConnectSocketState state, IAsyncResult asyncResult, Exception& exception)
--- End of inner exception stack trace ---
at System.Net.HttpWebRequest.GetResponse()
at CardDav.Client.Query(String url, String method, String content, String contentType)
at CardDav.Client.CanConnect()

....

 Solution

The Backend is unable to connect to the PeopleSync Frontend. This may be because of the following reasons:

• The PeopleSync Frontend is down

• A network is preventing the PeopleSync Service on the Backend to connect to the PeopleSync Frontend.

To further diagnose and resolve the problem, please follow advice in this article:

How to know if Frontend is operational

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