Detect http 403 error

[Italtel]

Hi all

we have a small problem,
we need to intercept an http 403 error on a web page
in our server; we are monitoring this server with the Zabbix agent.

The following are the triggers which aren't able to detect
the error when the site fails:

Check http service
{icssw024.settimo.italtel.it:http.last(0)}<1

Check http service nodata
{icssw024.settimo.italtel.it:http.nodata(180)}=1

Check performance http service
{icssw024.settimo.italtel.it:http_perf.last(0)}>10 k

IIS is not running
{icssw024.settimo.italtel.itroc_cnt[inetinfo.exe].last(0)}<1

State of IISADMIN was changed on icssw024.settimo.italtel.it
{icssw024.settimo.italtel.it:service_state[IISADMIN].last(0)}>0

State of: Servizio Pubblicazione sul WWW was changed on icssw024.settimo.italtel.it
{icssw024.settimo.italtel.it:service_state[W3SVC].last(0)}>0

State of: Sistema di eventi COM+ was changed on icssw024.settimo.italtel.it
{icssw024.settimo.italtel.it:service_state[EventSystem].last(0)}>0


Can you help us?

Thanks

Anthony & Max