WatchDog is an auxiliary application for HostMonitor. WatchDog for Windows included into Advanced Host Monitor package.
WatchDog for Linux can be downloaded separately.
Lets say you have installed HostMonitor on reliable server and setup thousand test items to monitor entire network (or several networks).
HostMonitor will inform you in case of any problem. Unless... unless something happens to system where HostMonitor is running. What if
power supply dies, motherboard fries or Windows crashes due to some buggy driver? What if your main router stops responding?
There are various solutions. Lets start from less effective and go to the most effective.
Sure, this will not help when system where HostMonitor is running crashes. There is another option:
- You may setup HostMonitor to check connection to your router or ISP and use "network independent" alerts
(such as "Send SMS using GSM modem") to inform you about this problem.
- You may setup HostMonitor to start alerts when another operator stops monitoring or disables alerts
(using "Pause monitoring/alerting" dialog window) or just allow to stop monitoring for single administrator account using
You think this is annoying and not effective solution? We agree. There are much better solutions. There are other ways to monitor the monitor.
- You may use HostMonitor's built-in Scheduler to start some action(s) on regular basis. E.g. you may
setup HostMonitor to send e-mail to your smart phone every 30 min. If you do not receive e-mail then you know something is wrong.
Note: If you want to install HostMonitor on 2 systems, you need to order 2 licenses.
- Manually: You may use RCC, Web Service or Telnet Service
to check HostMonitor remotely. This way you may see what is going on, what test fails, what actions executed; you may acknowledge
statuses and change test parameters. You can do anything but you should do everything by yourself. RCC will not be able to take any
actions when HostMonitor stop responding (except call for help in case you set "play sound" action)
- There is another way: install WatchDog (and optionally another instance of HostMonitor) on another system
and use this system to monitor primary monitor automatically 24/7. Even better: you may setup 2nd system to start network monitoring when
primary HostMonitor does not respond.
- And finally you may monitor primary HostMonitor using another copy of HostMonitor! In such case all necessary
action can be started automatically. Also there is another good feature: primary HostMonitor may monitor backup HostMonitor so each system
will monitor colleague!
While WatchDog provides charts and alerts in one application at no additional cost (it is included into Enterprise package), 2nd instance
of HostMonitor will provide great flexibility and reliability. See HM Monitor test method.
So, lets talk about WatchDog.
WatchDog can be used as interactive application that displays statistics information and charts in real-time. It does not allow you to
manage test items like Remote Control Console. It provides just basic information about HostMonitor health: you will see is monitoring
started and actions enabled, how many test probes HostMonitor performs, how many test probes failed, how many actions started, etc.
In case you have many thousands of test items, Remote Control Console may increase network load and put additional load on HostMonitor
(HostMonitor needs to encrypt information about each performed test probe and send data to RCC).
In the same case WatchDog requests just general statistics information and does not increase resource usage.
On the other hand, you may start WatchDog as Win32 service, setup some actions and leave it unattended. Service will be started automatically on system boot, WatchDog will try to connect to HostMonitor and examine connection almost constantly. If connection drops, WatchDog will execute specified actions and try to reconnect. If connection recovered, service will start another set of actions.
For example you may use the following set of actions
- --"Bad" actions--
- Visual/sound alert when connection drops and 1st reconnect attempt failed
- Send syslog message to some console if connection cannot be established for 1 minute
- Start external program (sendmail): send e-mail to admin if connection cannot be established for 1 minute
- Start external program: start backup HostMonitor if connection cannot be established for 2 minutes
- --"Good" actions--
- Visual/sound alert when connection restored
- Start external program (sendmail): send e-mail to admin if connection is stable for 1 minute
- Start external program: stop backup HostMonitor if connection is stable for 2 minutes
Regardless how you start WatchDog (using application or service mode), it will provide the same user interface. Also it shows icon in system tray and changes icon image depending on conditions: connection dropped; connection established while HostMonitor alerts disabled; connection established but monitoring stopped; everything is Ok (connection established, monitoring started and alerts enabled).
WatchDog does not require any special installation. When you install HostMonitor using "Enterprise" or "Custom" installation mode,
watchdog.exe module will be located in HostMonitor's directory. You may simply copy this file to any system where you want to start
WatchDog. Optionally we recommend copying watchdog.ini and wdactions.lst files with default settings. When you want to move preconfigured
WatchDog from one system to another, you should copy these 3 files.
How to install WatchDog as Win32 Interactive service
Start WatchDog with the command line parameter "/InstallService". E.g. "watchdog.exe /InstallService". Software will install itself as
Win32 interactive service. Normally service will be started at system startup however you may start and stop service at any time using
standard Windows "Services" applet or command line like "net start HMWatchDogService", "net stop HMWatchDogService"
Note 1: We do not recommend installing WatchDog as a service under Windows NT 4.0. At least not as an interactive service. In the case
you really need to start WatchDog as a Win32 service on Windows NT 4.0, please disable the "Allow service to interact with desktop" option
for the service (option provided by Windows Services applet). In this case you will not be able to see WatchDog icon in the system tray.
Note 2: If you are using Windows Vista or Windows Server 2008, you will not be able to use GUI in service mode. You need to start another
instance in application mode when you want to change some settings.
Note 3: When you start WatchDog in application mode it checks for another instance and may stop service after confirmation (then it
allows you to start service when you close application).
To uninstall service, start WatchDog with command line parameter "/UninstallService". E.g. "watchdog.exe /UninstallService".
WatchDog configuration: quick start
To allow remote monitoring of HostMonitor please follow these simple steps:
- start HostMonitor
- configure HostMonitor's Remote Control Interface on RCI page in the Options dialog (menu Options)
- setup "watchdog" user accounts: specify password and list of acceptable IP addresses using HostMonitor's menu "User"->"Operators"
Now you may start WatchDog, type address of the system where HostMonitor is running (Host), enter password (Password) and
click "Connect" button. That's it.
When TCP connection established and authentication passed, WatchDog will display information about HostMonitor, show real-time charts, etc.
Optionally you may change TCP port used by HostMonitor, RCC, Web Service and WatchDog (RCI port); specify timeout and status refresh rate.
- RCI Port
if you setup HostMonitor to use other than the default TCP port (default port is 1054), please specify the same port to be used by WatchDog;
If system where HostMonitor is running protected by firewall, make sure firewall does not reject TCP requests on RCI port
the maximum amount of time (in seconds) WatchDog will keep waiting for the reply from HostMonitor before returning an error response;
- Status refresh rate:
WatchDog requests HostMonitor at regular intervals and retrieves statistical information. Refresh rate option specifies how often such
requests should be made.
- Do not store password, prompt before connection
if this option selected, WatchDog will show "Connection parameters" dialog and ask for password on every startup
- Use stored password, connect automatically
use this option when you want to start WatchDog without human interaction. Application will store password and connect to HostMonitor
automatically at startup. If you want to start WatchDog as service, you should use this option.
Note: you may change connection parameters at any time using menu "Action"->"Connect to HostMonitor"
If you just want to watch HostMonitor performance charts, your setup is done. WatchDog will request HostMonitor, retrieve statistics,
display charts, information about performed tests, actions, logging.
Note: ATC means Average Time Consumption.
E.g. "Actions: 230 | 0.01/sec | ATC: 4.09 msec/action" means the following:
- HostMonitor performed 230 actions
- HostMonitor started 0.01 action per second (in average)
- HostMonitor used 4.09 milliseconds for each action execution (in average). Note: HostMonitor calculates time used by main thread for
logging and actions, it does not include time used by auxiliary threads because its not so important.
This information can be useful for investigation of some 3rd party software related problems (e.g. if ODBC driver specified for ODBC
logging consumes too much time).
If you want to receive alerts while you away from HostMonitor and WatchDog, you need to setup "actions".
You may setup 2 lists of actions
To work with actions you can use the Options dialog. To bring up this dialog use menu Options
- one set will be executed when HostMonitor does not respond for some time
- another set will be executed when connection established and it is stable for specified period of time
To modify each set of actions use buttons located on right side of the list:
| Add ||Add new action into set|
| Edit ||Bring up Action Properties dialog for editing parameters of the selected action|
| Delete ||Remove selected action|
Here is a list of available actions to kick off in response to a problem:
Action properties are defined in the Action Properties dialog. Some properties are common across all action types. However, each type of
action has a set of parameters that are specific to the action type. Let's have a look at the common properties first (these parameters
located in the upper half of the Action Properties dialog):
The name of the action; WatchDog auto populates this field with a suggested name based on the type of action; you can change that name to
whatever name you want.
Condition to start action
Start when HostMonitor does not respond for N min
This parameter tells when "bad" action should be executed - when connection to HostMonitor is dropped and reconnect attempts fail for N minutes
Start when HostMonitor does respond for N min
This parameter tells when "good" action should be executed - when connection to HostMonitor is established and it is stable for N minutes
(0 means action should be executed when connection just established)
Action depends on "bad" one
This optional parameter is available for "Good" actions only. You can set "Good" action dependable on a "Bad" action. Why do you need it?
For example you defined "Bad" action to send an e-mail notification to the network administrator when connection lost for 3 minutes,
also you defined "Good" action to send a notification when connection restored and it is stable for 2 minutes. What happens if connection
was lost for 1 minute then everything works fine for an hour? WatchDog will not send a notification about failure (because connection
restored after 1 minute) but the program will send notification about restoring "Good" status. To avoid unnecessary "Good" action
execution you can mark "Action depends on bad one" option and select "Bad" action. In this case WatchDog will start "Good" action
only if corresponding "Bad" action was executed.
This action is designed to play a sound file (WAV, MID, etc). In addition to the common action parameters, the "Visual/Sound alert"
action has the following options:
Specify full path to the sound file or click small button on the right side and select file from the Open File dialog.
Show WakeUP window and play sound repeatedly
With this option enabled WatchDog will display a popup window with information about the event and will play a sound repeatedly
until you click "Stop" button.
Note: If you start WatchDog on Windows Vista, 2008 or Windows 7 using service mode, WatchDog ignores this option and plays sound
file just one time (because you cannot stop sound using GUI).
| Execute external program
Name of this action tells for it self, it launches specified external application. In addition to the
common action parameters this action has 2 more parameters:
Specify command line to launch external application. Macro variables may be used in the command line.
For example you may
- send message to another system in the LAN using command like net send * "%HMSystemAddr% %EventText%"
- start backup HostMonitor as application: c:\program files\HostMon8\hostmon.exe
- start backup HostMonitor as service: net start HostMonService
- start sendmail program to send e-mail message
- and so on.
This parameter specifies how the application window will be shown. Choose one of the possible options:
| SW_SHOWNORMAL || - ||displays an application window in its original size and position.|
| SW_HIDE || - ||starts application without displaying its window.|
| SW_MAXIMIZE || - ||displays an application window as a maximized window.|
| SW_MINIMIZE || - ||displays an application window as a minimized window.|
| SW_SHOWMINNOACTIVE || - ||displays an application window as a minimized window. The active window remains active.|
| SW_SHOWNOACTIVATE || - ||displays an application window in its original size and position. The active window remains active.|
This action sends data using the Syslog protocol. Syslog is the standard event logging subsystem for Unix, also you
can find Syslog service for Windows.
Syslog Daemon receives standard UDP Syslog messages sent from routers, switches, UNIX hosts, HostMonitor, other
network devices and can displays the details on screen, log to files, terminal devices, etc. Syslog also allows you
to forward log entries to another machine for processing, in this way syslog functions as a distributed error
In addition to the common action parameters, the "Syslog" action has the following
This is the name or IP address of the Syslog server.
The default SNPP port is 514, but you can specify a non-standard port.
Provide text message to send. Macro variables are supported in the message to be substituted
with their actual values at the action execution time.
Log messages are prioritized by a combination of facility and urgency level. Levels (severity) can be considered
various levels of a problem (e.g. warning, error, emergency) whereas facilities are considered to be service areas
(e.g. printing, email, network, etc). The levels available are the following:
|- ||Emergency || A panic condition. System is unusable.|
|-||Alert || A condition that should be corrected immediately, such as a corrupted system database.|
|-||Critical|| Critical conditions, e.g., hard device errors.|
|-||Error || Errors.|
|-||Warning || Warning messages.|
|-||Notice || Conditions that are not error conditions, but should possibly be handled specially.|
|-||Info || Informational messages.|
|-||Debug || Messages that contain information normally of use only when debugging a program.|
Facility is a number that considered as a service area. The various facilities are listed below:
|0 ||kernel messages|
|1 ||user-level messages (messages generated by random user processes)|
|2 ||mail system|
|3 ||system daemons|
|4 ||security/authorization messages|
|5 ||messages generated internally by syslogd|
|6 ||line printer subsystem|
|7 ||network news subsystem|
|8 ||UUCP subsystem|
|9 ||clock daemon|
|10 ||security/authorization messages|
|11 ||FTP daemon|
|12 ||NTP subsystem|
|13 ||log audit|
|14 ||log alert|
|15 ||clock daemon|
|16-23 ||reserved for local use|
This action sends a message to the Management Station using the SNMP protocol. The SNMP (Simple Network Management Protocol) is
the Internet standard protocol for exchanging management information between management console applications and
managed entities (hosts, routers, bridges, hubs, etc).
In addition to the common action parameters, the "SNMP Trap" action has the following
Here you should provide the host name (e. g. mail.maincorp.com) or IP address (e. g.
220.127.116.11) of the host that will receive SNMP Trap messages. This machine should be running a SNMP console
in order to receive the trap message. You can use macro variables in this field.
Also you may specify non-standard UDP port. Port number can be provided after a colon following the destination address (e.g. 18.104.22.168:1162).
Provide IP address of the agent that generated the SNMP Trap. If you keep default value "localhost", WatchDog
will use IP address of the system where it is running.
Specify the SNMP community name used for this trap. The default community for most systems is "public". The
community string must match the community string used by the SNMP console.
Identifies the type of the object causing the trap.
Choose one of the generic trap types:
- Cold Start
- Warm Start
- Link Down
- Link Up
- Authentication Failure
- EGP Neighbor Loss
- Enterprise Specific
If Trap type is Enterprise Specific, provide an ID of the trap.
SNMP Trap message can include OID relevant to the message and its value. Define object identifier in this field
(object identifier is the name that uniquely identifies the object, e.g. OID "22.214.171.124.126.96.36.199" represents the
number of network interfaces on which system can send/receive IP datagrams).
Define an object's value. You can use macro variables in this field as well.
Choose type of the data. It can be one of the following:
- OCTET STRING
- OBJECT IDENTIFIER
- IP ADDRESS
While defining some of the alert action's parameters you can use special macro variables:
|%HMVersionText% ||Version of HostMonitor, like HostMonitor v. 8.12|
|%HMVersionBin% ||Binary version, like 0812|
|%HMSystemName% ||Name of the system where HostMonitor is running|
|%HMSystemAddr% ||Host name or IP address of the system where HostMonitor is running (address that was specified as connection parameter)|
|%HMStartedTime% ||Date and time when HostMonitor was started|
|%HMStatusString%||String that represents status of target HostMonitor, like the following|
- monitoring started, alerts enabled, modifications stored
- monitoring stopped, alerts disabled, modifications not stored
If connection to HostMonitor was dropped, this variable returns 'request failed' string
|%WDSystemAddr% ||IP address of the system where WatchDog is running|
|%WDSystemName% ||Host name of the system where WatchDog is running|
|%ConnectedAt% ||Date and time when connection to HostMonitor was established, can be used for "good" actions|
|%ConnectedTime%||Time when connection to HostMonitor was established, can be used for "good" actions|
|%DisconnectedAt%||Date and time when connection was lost, can be used for "bad" actions|
|%DisconnectedTime% || Time when connection was lost, can be used for "bad" actions|
|%EventText% ||Returns 'Connection established' string for "good" actions and 'Connection lost' for "bad" actions |
The following table illustrates where you can use macro variables:
|Action||Macros applicable ||Action parameters where macros are applicable |
|Visual/sound alert ||No|| |
|Execute external program ||Yes||Command line|
|SNMP Trap||Yes||Destination address|
Minimum system requirements
The system on which you plan to run WatchDog should meet the following requirements:
- Windows XP SP2, Windows 7, 8, 10, 11
- Windows Server 2003 SP2, Server 2008 SP2/R2, Windows Server 2012, 2016, 2019, 2022
- TCP/IP connection (LAN or Dial-up)
- 2 MB of free disk space
- Minimum screen resolution: 800 x 600
How much does it cost?
When you purchase an Advanced Host Monitor ENTERPRISE package you get 1 RCI license (such license allows you to use Remote Control Console,
Web Service, Telnet Service and WatchDog). Holders of a Starter, Professional or Advanced licenses may buy an RCI license separately for $199.
You can order license using credit card, Switch and Solo debit cards, check/money order or wire transfer. If you are concerned about
submitting your order and/or credit card information online, you may register the software via phone, fax or postal mail.