Full Page Cache Caching Application Magento\PageCache\Model\System\Config\Source\Application Varnish Configuration Access list IPs access list separated with \',\' that can purge Varnish configuration for config file generation. If field is empty default value localhost will be saved. Magento\PageCache\Model\System\Config\Backend\AccessList 1 Backend host Specify backend host for config file generation. If field is empty default value localhost will be saved. Magento\PageCache\Model\System\Config\Backend\Varnish 1 Backend port Specify backend port for config file generation. If field is empty default value 8080 will be saved. Magento\PageCache\Model\System\Config\Backend\Varnish 1 Export Configuration Magento\PageCache\Block\System\Config\Form\Field\Export\Varnish3 1 Magento\PageCache\Block\System\Config\Form\Field\Export\Varnish4 1 2 TTL for public content Public content cache lifetime in seconds. If field is empty default value 86400 will be saved. Magento\PageCache\Model\System\Config\Backend\Ttl