The page contains resources of multiple servers. However, some servers are inaccessible due to packet filtering. Clients attempt to access these servers several times, causing slow Internet access.
Identity the IP addresses of the servers connected to the page and modify the interzone packet filtering policy to make these IP addresses accessible.
In addition, the heartbeat link is also the channel for backing up configuration commands and status information. If much information needs to be synchronized between the two firewalls and it consumes much bandwidth, heartbeat packets may be discarded.