Reference Manual - Videx, Inc.

Push Notification PortBoth Flex System Hubs and Web Authorizers periodically contact CyberAudit-Web to reporttheir status and fetch updates. By default that occurs once every 30 seconds. In addition,CyberAudit-Web attempts to notify a hub using TCP/IP on port 80 when it has an update forthat hub. This "push notification" causes the hub to contact CyberAudit-Web immediatelyrather than wait for its normal check-in time. If desired, port 80 may be changed to anothervalue on a hub-by-hub basis using the Push Notification Port setting in the hub propertiespage. The result of this notification is that online hubs can get instructions to update key andvault records in nearly real time.In cases where TCP/IP traffic is routed in both directions between CyberAudit-Web and theFlex System hub or Web Authorizer, push notifications will occur automatically. In some casesthe hub may not be on the same network as CyberAudit-Web. An example of this is whenCyberAudit-Web is being served on the Internet and the hub is behind a NAT router. ThePush Notification Port enables the use of port forwarding on the router to direct thosenotifications to hubs in the local network.