var context = OperationContext.Current;

var properties = context.IncomingMessageProperties; //获取传进的消息属性

var endpoint = properties[RemoteEndpointMessageProperty.Name] as RemoteEndpointMessageProperty; //获取消息发送的远程终结点IP和端口

string UserLoginIp = endpoint.Address; // 获取发送消息的客户端的 IP 地址。

string UserLoginProt = endpoint.Port.ToString(); //获取发送消息的客户端的端口号。

string clientIP = HttpContext.Current.Request.UserHostAddress;