Zabbix i kvalitet servisa

Potrebno mi je da izmerim kvalitet servisa za FTP i HTTP/HTTPS.
Problem je u tome što na hostu imam RHEL4U5 i NEMAM Zabbix agenta.

Jedna od opcija je korišćenje tzv “Simple checks”, u ovom slučaju net.tcp.service.perf, za portove 21, 80 i 443 (videti dobar link) :
net.tcp.service.perf[service,,]
Check performance of service :
0 – service is down
sec – number of seconds spent while connecting to the service
service – one of ssh, ntp, ldap, smtp, ftp, http, pop, nntp, imap, tcp, https, telnet
ip – IP address of the Zabbix host definition
port – port number (by default standard service port number is used).
Example : net.tcp.service.perf[ssh] can be used to test the speed of initial response from SSH server.
Evo kako sam ga ja definisala za moj FTP server :
Name – net.tcp.service.perf
Type – simple check
Key – net.tcp.service.perf[ftp]
Napomena – ako se stavi samo ime servisa, a ne stavi se port, biće korišćen default port, što je u mom slučaju OK
…..
Type of information – numeric (float)
Units – s
Use custom multiplier – no
Update interval (in sec) – 90
…..
Applications – FTP service

Pratiti vreme odziva servisa (RTT – round trip time) jedno vreme, i tek onda staviti granice.