have you tried with nmap? something like this:
nmap -sS <IP_BACKEND> -p <PORT_BACKEND> | grep open
echo $? = 0 in my case.
In case you want to integrate with Farmguardian, you have to create your
own script in /usr/local/zenloadbalancer/app/libexec/, here some example:
http://www.zenloadbalancer.com/knowledge-base/howtos/farmguardian-quick-start-configuration/
Regards!
2016-04-14 11:28 GMT+02:00 Ebert, Matthias <matthias.eb...@siemens.com>:
> Hello community
> We are trying to use FarmGuardian to check for an open port on our backend
> servers.
> We are using this command:
> check_tcp -H HOST -p 5085
>
> Unfortunately, this check is flooding the log file of the application that
> is listening on that port with the following error:
> 16:32:04 Cannot execute the operation 'WSARecv1()' on session 72228:
> WSAECONNABORTED: An established connection was aborted by the software in
> your host machine.
>
> I already did some tests to do a so called “tcp_half_open” check, which is
> available on the F5 Networks load balancer, but I cannot get it work with
> the ZEN load balancer.
>
> Does somebody have a hint, how to write a plugin for FarmGuardian to do a
> “tcp_half_open” check?
>
> Thank you very much in advance.
>
> Best regards,
> Matthias
>
>
>
>
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