The IP config is not configured completely.
So that, the error is coming.
Muthu Krishnan. M
Thanks for your prompt response. but I have configured my machine as well as my Salesforce instance Server ip correctly. After configured I ran HTTP response check tools like Postman,HTTP client etc., I am able to establish the connection but thorugh Salesforce I am not able to establish a connection.
Please suggest what I need to check. also let me know how to add the parameters.