not install agents can monitor port ?

[eui7721]

not install agents ,server can monitor port?

[Alexei]

Yes, ZABBIX does support agentless monitoring and monitoring of external services (FTP, SSH, HTTP, etc).

[tronite]

not install agents ,server can monitor port?

Please be more clear next time?

[eui7721]

I mean Monitor port up/down

not install agents can monitor port state （up/down）

[testos]

From ZABBIX Manual v1.4 Release 007, page 99:

5.11.4. Simple checks
Simple checks
Simple checks are normally used for agent-less monitoring or for remote checks of services. Note that ZABBIX Agent is not needed for simple checks. ZABBIX Server is responsible for processing of simple checks (making external connections, etc).
All simple check accepts two optional parameters:
ip - IP address. Dafult value is 127.0.0.1
.......

The first steep for problems resolution is look for zabbix manual.

Regards