Issue with Telnet Checks

[joe.thomas]

I have an item using the TELNET agent. The key is set to 'telnet.run[temp0]'.

With tcpdump, I can see zabbix-server connecting to the host, and no error messages are present in the logs. The item also does not switch to 'not supported'. The data, however, never appears in "Recent Data" or anywhere else.

When the host was taken off the network, I got the following log entry:
item [host1:telnet.run[temp0]] became not supported: cannot connect to TELNET server

And, naturally, the item was set to 'not supported'.

Any help in this regard would be greatly appreciated!

[joe.thomas]

An update: testing with a simple echo, everything works fine. I changed the type for my item to Text and discovered that Zabbix is getting the command string as well as the value I want as the result. For reasons unknown, Zabbix didn't fail with a type error and disable the item.