Who is calling a WebService

An HttpContext object contains information about the http transaction, including the request and response objects. The request object will give you the IP of the client. You can get one from WebService.Context. Here is an excerpt from one of my Delphi webservices. [WebMethod] function TWebService1.ClientInfo: string; begin Result := 'UserHostName : ' + self.Context.Request.UserHostName + ' ; UserHostAddress : '+self.Context.Request.UserHostAddress; end; In your case, I would strongly suggest that the IP be a parameter in the web method call instead of using the request.userhostaddress. The IP MUST be exact for the UDP to work, and you can not always rely on the http client to properly relay its IP. Also, beware of web proxies. UDP won't always go through the same proxy and may not work for those users.

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spgilmore22y ago
An HttpContext object contains information about the http transaction, including the request and response objects. The request object will give you the IP of the client. You can get one from WebService.Context. Here is an excerpt from one of my Delphi webservices. [WebMethod] function TWebService1.ClientInfo: string; begin Result := 'UserHostName : ' + self.Context.Request.UserHostName + ' ; UserHostAddress : '+self.Context.Request.UserHostAddress; end; In your case, I would strongly suggest that the IP be a parameter in the web method call instead of using the request.userhostaddress. The IP MUST be exact for the UDP to work, and you can not always rely on the http client to properly relay its IP. Also, beware of web proxies. UDP won't always go through the same proxy and may not work for those users.