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LAN Monitoring
Some computers are very important and should keep running 24 hour reliably,
such as machines in the data center, servers running the businesses of one
company. They need to be monitored, if anything wrong happen the network
administrators should get the notice at the earliest time. Based on computer
status detection, LanHelper's LAN monitoring feature is capable of checking whether the
computers were on-line or off-line, and
detects modifications of computer names and IP addresses.
Once status changing was detected,
network administrator will be immediately notified by e-mail, network
message, etc.
One computer has probably seven statues in LanHelper. On the bottom of this
page a table lists all the statuses. These statuses are determined by
Refresh Status functionality, and Refresh Status has four
sub-functionalities. Refresh By IP checks the active IP and detects
modification of computer name. Refresh By Name checks the
on-line computer and detects modification of IP address. Refresh By IP And Update Name
and Refresh By Name And Update IP functionalities update name or IP
besides status detection. To start LAN monitoring, first check the menu item
"Monitor Mode" under the Refresh Status menu, then click one of the four
functionalities.
Under monitor mode, status changing would trigger alert event. At present four events
are available on Refresh Status tab of Options dialog. If status changed and current status is
"---", it will trigger "status changed to be off-line" event. If the
previous status is "---", and current status is "alive", "@!", "!@", "@*" or
"*@", it will trigger "status changed to be on-line" event. If pervious
status is "alive", and current status is "@!", "!@", "@*" or "*@", it will
trigger "Name or IP changed" event. "Any change" event includes
all status changes. If the value (let's say x) of Refresh Status option "consider
status changed if consecutive" is set to 1 (default value), the events
would be triggered immediately every time the status changed. If x greater
than 1, the events would be triggered only when the changed status
continuously appear x times.
While the events have been triggered, alert information would be sent out,
or some actions would be performed. For example, send network message or
e-mail to system administrator, perform Wake-On-LAN operation to power on
off-line computers,
perform shutdown operation to power off on-line computers, etc.
To the computers located on your own subnet, Refresh By IP and Refresh By Name
both work fine. To the computers located on other subnet or WAN, only Refresh By IP
can work.
To monitoring whether computers have been down, use Refresh By IP or Refresh
By Name, and turn on "status changed to be off-line" alert event. To monitoring whether IP addresses have been modified, use Refresh
By Name and turn on "name or IP changed" alert event. To monitoring whether
computer names have been modified, use Refresh By IP and turn on " name or
IP changed" alert event.
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Status Symbol |
Description |
| alive |
The machine is on-line. |
| --- |
The machine is off-line. |
| @! |
Name active but IP changed. |
| @* |
Name active, IP changed and has been
automatically updated by the program. |
| !@ |
IP active but name changed. |
| *@ |
IP active, name changed and has been
automatically updated by the program. |
| ? |
Unable to determine status or the status
is unknown. |
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