Hi Alex, In case nobody else replies, wanted to give you a lead - you can check the source code of check_tcp.c at the URL below for instances of critical to get a good feel for the conditions that are possible:
https://github.com/monitoring-plugins/monitoring-plugins/blob/master/plugins/check_tcp.c This is something I do wish was included in the documentation, but it is what it is, so often I do end up picking through the source code. - Kodiak Sent with [Proton Mail](https://proton.me/) secure email. ------- Original Message ------- On Wednesday, October 26th, 2022 at 11:19 AM, Savino Alex <alex.sav...@beta80group.it> wrote: > Hi, > > I’v would like to know what are all the possible critical state about this > plugin. (socket timeout, connection refused.. etc). > > Thank you > > Alex > > Alex Savino > > ICT Services & Solutions > > alex.sav...@beta80group.it > > [https://i.etsystatic.com/18010119/r/il/8409f5/1625246389/il_570xN.1625246389_cqyn.jpg](https://www.linkedin.com/company/beta-80-group/)[https://i.etsystatic.com/18010119/r/il/8409f5/1625246389/il_570xN.1625246389_cqyn.jpg](https://twitter.com/Beta80Group)[https://i.etsystatic.com/18010119/r/il/8409f5/1625246389/il_570xN.1625246389_cqyn.jpg](https://www.instagram.com/beta80group/) > > BETA 80 GROUP | Via Socrate, 4120128 Milano > > [www.beta80group.it](http://www.beta80group.it/) > > Le informazioni contenute in questa e-mail e nei suoi eventuali allegati sono > riservate e destinate esclusivamente alla/e persona/e oente indicate > nell'indirizzo [(read more)](https://beta80group.it/disclaimer-mail/)