Varnish & Full-Page Caches
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If you use Varnish or another full-page cache mechanism, you must exclude certain Nosto blocks (hole punching).
Nosto adds query parameters to the product URLs for tracking purposes. You may encounter a cache-miss when query parameters are appended to the URL. We recommend .
Magento CE does not ship with a built-in FPC mechanism and you must manually exclude two Nosto blocks. Failure to do so may result in sensitive information leaking across browser sessions.
Note: The plugin uses a feature called hashed cookie identifiers (HCID) to safeguard against the leakage of customer information on Nosto's end.
If you are using Magento EE's built-in FPC mechanism, you need not worry about hole punching as hole-punching rules are auto-configured.