[Xymon] UDP open ports monitoring

[Mark Felder]

On Mar 16, 2014, at 10:57, Christian <xymon at elysiria.fr> wrote:

> And I wonder if the philosophy of the "ports" probe
> is only to check stateful connections (aka TCP) and thus I have to clone it
> and create a "ports2" to check UDP, or if this probe could be patched to
> check also UDP connections.

The real question is *how* ? How exactly do you check remotely if a UDP port is open? There is no state; there is no 3-way handshake. You will have to write code that speaks the protocol of the UDP service you're monitoring to prove it's there and listening/functioning.