How is working check net.tcp.service

[Patjomkin]

Hi all.

I have mail server (zimbra) on ubuntu.
Don't working net.tcp.service[imap] or net.tcp.service[imap,"ip my server", 143].
But working net.tcp.port[,143] or net.tcp.port[ip my server,143].

II can connect to mail server telnet "ip my server" 143
externel:
telnet mail.my.com 143
Trying "ip my server" ...
Connected to mail.my.com.
Escape character is '^]'.

local:
telnet localhost 143
Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.

How is working net.tcp.service for imap (for pop3 it's working)?

[Bernd Hohmann]

Don't working net.tcp.service[imap] or net.tcp.service[imap,"ip my server", 143].
But working net.tcp.port[,143] or net.tcp.port[ip my server,143].

I don't think it makes a difference if you use "[imap]" or "[,143]" Maybe the "imap" Parameter is broken - you may fill in a bug report.

Bernd

[Patjomkin]

I don't think it makes a difference if you use "[imap]" or "[,143]" Maybe the "imap" Parameter is broken - you may fill in a bug report.

Bernd

What is the difference between net.tcp.service[imap] and net.tcp.port[,143] ?
I'm sorry, but i don't understand how work net.tcp.service[imap].
Please, help me.

[Bernd Hohmann]

Sorry for the delay, I was out of the office for a while.

What is the difference between net.tcp.service[imap] and net.tcp.port[,143] ?

As far as I understand: there is no difference. pop/imap/smtp.. and so on are just presets for the port. Not a very good construction in my opinion because everyone thinks that "imap" will do some kind of "real" service check.

Bernd

[Patjomkin]

Sorry for the delay, I was out of the office for a while.
As far as I understand: there is no difference. pop/imap/smtp.. and so on are just presets for the port. Not a very good construction in my opinion because everyone thinks that "imap" will do some kind of "real" service check.

Bernd

Thank you very much for the answer.
May be you can say me how work net.tcp.service? It's really checking port? Then why do we net.tcp.service if we have net.tcp.port?

[Bernd Hohmann]

May be you can say me how work net.tcp.service? It's really checking port? Then why do we net.tcp.service if we have net.tcp.port?

I *think* "net.tcp.service" and "net.tcp.service.perf" simply open a socket and wait until some text is returned. There may be protocol specific stuff (eg. "http" sends a "GET" request first to get a response), but the result is not validated. I read somewhere that using "ssh" on port 110 (pop3) will return a positive result so I guess Zabbix will only check "something was returned".

net.tcp.port will only open the socket on the given port and return if the socket connection can be established.

Bernd

[Patjomkin]

I *think* "net.tcp.service" and "net.tcp.service.perf" simply open a socket and wait until some text is returned. There may be protocol specific stuff (eg. "http" sends a "GET" request first to get a response), but the result is not validated. I read somewhere that using "ssh" on port 110 (pop3) will return a positive result so I guess Zabbix will only check "something was returned".

net.tcp.port will only open the socket on the given port and return if the socket connection can be established.

Bernd

Thank you very much