Monitor the telnet service with simple check

[s0r1n]

After attempt to remotely monitor telnet service with simple check running on a specific port, the returned value is always 0 (service is down). The port is opened:

# telnet x.x.x.x 5559
Trying x.x.x.x...
^]

Same result when attempt to monitor locally:

# telnet localhost 5559
Trying 127.0.0.1...
^]

Any clue why it isn't working?

Note. The server runs under SolarisOS and not Zabbix agent is installed. From Zabbix Documentation 2.0: "Note that Zabbix agent is not needed for simple checks"

[ingus.vilnis]

Hi,

Posting the item settings here in this case would be great help for troubleshooting.

Best Regards,
Ingus

[s0r1n]

Attachment

Thanks for reply, see attached the screenshot of the item.

[s0r1n]

We figured out later that on the 5559 port is not running telnet, but SIP2 (Standard Interchange Protocol).
Probably "net.tcp.service" won't work because this service/protocol is not supported by Zabbix, please confirm.

[ingus.vilnis]

Hi,

Yes, you can only use the following services as per documentation:
ssh, ntp, ldap, smtp, ftp, http, pop, nntp, imap, tcp, https, telnet

https://www.zabbix.com/documentation/2.4/manual/config/items/itemtypes/simple_checks

Best Regards,
Ingus