Connecting external middleware using xml-rpc

Hello together,
I'm not a SAP specialist. But I have to integrate an external middelware in the eh&s module. The middleware is offering a xml-rpc interface only.
Can anybody tell me best practices to connect an external middleware using xml-rpc?
My ideas are to develop a JCo for the R3 based systems an to use JCA for the NetWeaver systems.
Is that best practice?
Thanks and regards,
Matthias

Hi,
I am trying to implement and run the sample application given under {Forte_Root}/install/examples/xmlsvr.
I have done all the required steps, but I am getting this error given below.
I am using soap-2_3 for SOAP and xerces-2_2_1 for XML parser, my server (Forte UDS)is on windows NT.
Please Note:- While connecting to the External web sites from my office, I need to connect through the firewalls and I need to give the user name and password to access the external web sites.
so my question is,
1. while connection to the server (Forte UDS SO) does it make connection to external website such as
xmlns:xsd="http://www.w3.org/1999/XMLSchema"
xmlns:xsd1="http://localhost/bankservices.xsd"
xmlns:soap="http://schemas.xmlsoap.org/wsdl/soap/"
xmlns="http://schemas.xmlsoap.org/wsdl/">
and since i have to connect through the firefall and use the passwords, Am I not able to make connection?
2. Does any body of you had similar problem and how you are able to resolve this.
3. If I need to give user name and password, while making connection to external website, can you please tell, where I need to specify that. (Will it be in WSDL file etc)?
Your help is appreciated
Thank You,
Srikanth
-------------------ERROR---------------------------------
Exception in thread "main" [SOAPException: faultCode=SOAP-ENV:Client; msg=Error opening socket: java.net.ConnectException: Connection refused: connect; targetException=java.lang.Il
legalArgumentException: Error opening socket: java.net.ConnectException: Connection refused: connect]
at org.apache.soap.transport.http.SOAPHTTPConnection.send(SOAPHTTPConnection.java:354)
at org.apache.soap.rpc.Call.invoke(Call.java:248)
at com.forte.xmlsvr.bankservices.BankSOProxy.GetAccountData(BankSOProxy.java:105)
at com.forte.xmlsvr.examples.BankClient.main(BankClient.java:12)
------------------------ERROR-------------------------------------------------

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