as a follow up, I tried to do this myself. I open up SNMP viewer, and tried to query this service. It is OID for Microsoft ISA Server Control.

1.3.6.1.4.1.77.1.2.3.1.3.28.77.105.99.114.111.115.111.102.116.32.73.83.65.32.83.101.114.118.101.114.32.67.111.110.116.114.111.108

Strangely when i tried to create snmp monitory by copying the OID and did the test on the same server, i got error saying

SNMP check (ISA Server test) for -deleted-
OID=1.3.6.1.4.1.77.1.2.3.1.3.28.77.105.99.114.111.115.111.102.116.32.73.83.65.32.83.101.114.118.101.114.32.83.116.111.114.97.103.101  Instance=0  Argument=
ReadCommunity=public  Timeout=2  Retries=1
Comment=
Failed to read SNMP value. Error=Response packet contained the error: No Such Name

where did i go wrong?

It appears that performing WMI calls is very flakey (in general? in Whatsup?)
Using SNMP seems more stable and faster, so make SNMP equivalant service checks instead of the WMI ones.
The only downside is that it won't automatically restart the service.

To do this, go into Whatsup, then Tools and SNMP Viewer.  Put in the IP of the machine that has the service on it that you wish to monitor, and put in the approprate Community and click OK. Then right-click cht computer and choose View MIB. Now look under iso.org.dod.internet.private.enterprises.lanmanager.lanmgr-2.lmServer.lmsvSvcTable
Now find the service you wish to monitor and double click it so you see the lmsvSvcName on the right pane.
Double click the lmsvSvcName - we will use the EXACT name listed as the value to check for and the Object OID (get rid of the instance number) as the OID.
To actually setup the monitor perform the following steps:
In Whatsup, Configure->Active Monitor Library->New->SNMP Monitor
Put "Windows Service - Service name" for the name (replace Service name with your service name - duh)
Put in the Object Id you got in the previous step and remove the Instance (make it blank)
Leave the Check type as Constant Value and then put in the EXACT service name as shown in the previous value as the Constant Value - this will match for the UP condition.

That's it.

Jim

maybe I did not understand jnickel's post correctly, but:

I wonder how you all use SNMP to check the availability of a windows service, when
the OIDs of the service disappear from SNMP as soon as the service stops.

Service is running:

 SNMP check (#myservice#) for #myip#
 OID=1.3.6.1.4.1.77.1.2.3.1.1.8.67.108.105.101.110.116.51.50  Instance=  Argument=
 ReadCommunity=#mycommunity#  Timeout=2  Retries=1
 Comment=
 Constant Value Check: Polled Value=#servicename#, Constant Value=#servicename#
 Polled value MATCHED constant value. Monitor is UP

Service is not running:

 SNMP check (#myservicename#) for #myip#
 OID=1.3.6.1.4.1.77.1.2.3.1.1.8.67.108.105.101.110.116.51.50  Instance=  Argument=
 ReadCommunity=#mycommunity#  Timeout=2  Retries=1
 Comment=
 Failed to read SNMP value. Error=Response packet contained the error: No Such Name

Nice error, but this will not cause WUG to scream, but to show the monitor still up
and everything ok.

Could somebody please show me where the errors is?
Thanks.

CH

Turned wug-server off and on once more after receiving your message.

State changes now up and down as designed.

Thank you.

CH