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Query on SFDC Integration - Siebel Webservice and SFDC Instance accessed within VPN

Hi All,


We are working on POC and trying to integrate SFDC System with Siebel Webservice within VPN.

WSDL file has been imported into SFDC and remote settings point to Siebel server URL. When we try to make a Webservice callout we get an error:-


10:15:09.110 (60110303000)|FATAL_ERROR|System.CalloutException: IO Exception: Read timed out


Siebel System resides behind the firewall and client is reluctant to open-up a firewall to such a large IP Range. We are trying to make a callout without a firewall burn within the VPN.

Is there any other settings/configuration required to achieve this callout to Siebel Webservice within VPN.


Can we use any other tool/mechanism to connect to Siebel System without opening such a large IP Range. Is it possible to limit the IP Range for an SFDC instance.

Please reply in case you have dealt with similar integration. Thank you.




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