The Host Information page displays detailed status information about a network equipment connected to your unit.
Hostname - Enter/edit the name of the host at specified IP address, then click Save. Changes the host's primary name on Network status Connected hosts list, and in DNS database.
Ping - a method used to discover if a network equipment is online or not. A ping request is sent to the IP address. PCs answering to ping are online. NOTE: Some network equipment may not answer to ping but still be online.
ARP - another method used to discover if a network equipment is online or not. An arp request is sent to the IP address. All network equipment online do answer to ARP requests with their MAC address. NOTE: ARP only works with hosts connected directly (through hubs and switches). Hosts connected indirectly (through gateways and proxys) do not answer to ARP requests but may still be online.
DHCP - shows if host's IP address is listed in the DHCP database or not. The DHCP server will ALWAYS give the specified IP address to the host with the specified MAC address.
Delete - remove all entries about this host from ARP, DHCP and DNS databases. Mark checkbox and click Delete to wipe out all stored information about this host. NOTE: If host still is attached to network, it might automatically reappear after a while.
SIP - list of all SIP users registered on host.
Flows - list of all hosts this host is connected to. A "flow" is a stateful inspected data stream through the firewall - flows are used to get data through a firewall. A flow is opened when data is begun transmitted, and generally closed about 1-5 minutes after data transmission was finished.
Read more online: