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Question on Apex Callout
I'm trying to invoke a webservice from my vf page on button click (wsdl2apex). Now my question is whether the request going to the ENDPOINT URL will be my machine's IP address or salesforce instance's IP address?
The Salesforce instance's IP address. If you need ip address to be white-listed, you should be able to get the East & West Coast Salesforce Datacentres from your support rep.
Or actually I've found the address ranges on another board post
http://boards.developerforce.com/t5/Apex-Code-Development/What-is-Salesforce-IP-address-range/td-p/69917
204.14.232.0/25 East Coast Data Center (set one)
204.14.233.0/25 East Coast Data Center (set two)
204.14.234.0/25 West Coast Data Center (set one)
204.14.235.0/25 West Coast Data Center (set two)
All Answers
So your question is, your webservice request would be sent from Salesforce IP or your machine IP. Answer is Salesforce IP.
The Salesforce instance's IP address. If you need ip address to be white-listed, you should be able to get the East & West Coast Salesforce Datacentres from your support rep.
Or actually I've found the address ranges on another board post
http://boards.developerforce.com/t5/Apex-Code-Development/What-is-Salesforce-IP-address-range/td-p/69917
204.14.232.0/25 East Coast Data Center (set one)
204.14.233.0/25 East Coast Data Center (set two)
204.14.234.0/25 West Coast Data Center (set one)
204.14.235.0/25 West Coast Data Center (set two)