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ECI DCA Connection RequirementsAll collected data is sent to the PrintFleet Optimizer server where it is made available for reporting and alerting.ECI DCA connects to your PrintFleet Optimizer server using HTTPS (port **443/tcp**). Please contact your PrintFleet solutionadministrator for information on domain names and IP address(es) used by your server. This connection is protected by industry standard**TLS** (Transport Layer Security).This connection stays open the entire time ECI DCA is running.Normally a **WebSocket** connection is used, but in some situations ECI DCA may fall back to using either **server-sent events**### PrintFleet CentralPrintFleet Central is a service run by PrintFleet to facilitateDCA registration, automatic software updates, and DCA installations (this site), and is required for ECI DCA operation.Note that ECI DCA doesn't send any collected device or configuration data to PrintFleet Central.#### Software UpdatesECI DCA auto-updates itself by downloading updates published on https://updates.printfleetcdn.com/.Connections are always made on the standard HTTPS port **443/tcp**.#### RegistrationECI DCA uses DNS requests to `*.reg.pf-d.ca` to register. It will first try to do this using the localnetwork DNS servers, and then fall back to talking directly to PrintFleet Central IP addresses (using port **53/udp**).The firewall only needs to permit this connection to PrintFleet Central if local DNS server(s) don't resolve the registration requests.#### Service RegionECI DCA is routed to the region to which it has the lowest network latency and based on serviceavailability. In certain locations, the region being used may change over time as activity onthe global internet infrastructure can affect latency.### SupportPlease contact [PrintFleet Support](<mailto:support@ecisolutions.com?subject=ECI DCA Connectivity Question>) if you have additional questions