I am trying to render <images> hosted on my AWS S3 server on my Visualforce page (rendered as PDF). If I don't render the page as PDF the images load fine, however in PDF view all images are broken image placeholders.

I suspect it is due to the CORS policy (set in AWS) prohibiting images being loaded from unfamiliar urls. Does anyone know how I can verify what server/url the images are being loaded from?

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