Salesforce prevents calls to unauthorized network address

We have a callout inside a class (using @future) which was throwing following exception:

Apex script unhandled exception by user/organization:005A0000001WKkE/00DA0000000KYuL

Failed to invoke future method ‘public static void invokeProcess(String, String, String, Decimal, String, String, String, Datetime, String, String)’ on class ‘FillAccordForrms’ for job id ‘707A000000AYXxu’ caused by: System.CalloutException: IO Exception: Unauthorized endpoint. Please check Setup->Security->Remote site settings.

endpoint = https://hostname:port/soa-infra/services/default/project/client_ep

Solution

Before any Apex callout can call an external site that site must be registered in the Remote Site
Settings page or the callout fails.

To add a remote site setting:

• From Setup, click Security Controls | Remote Site Settings
• Click New Remote Site
• Enter a descriptive term for the Remote Site Name
• Enter the URL for the remote site
• Optionally, enter a description of the site
• Click Save

You can also check the steps at official documentation here:

https://developer.salesforce.com/docs/atlas.en-us.apexcode.meta/apexcode/apex_callouts_remote_site_settings.htm

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