P3 not avilable through lan

[Geoffroy Docq]

Dears,
This is second time that i see the profilux is no more connected to the lan.
The first time, the profilux came back available on the network after several days and i don't know the reason.
Today (more than 2 months after the first incident) it is still unavailable via the lan card, i cannot connect to it through LAN

I already restarted my router and my CPL, without success.
When i connect through wireless (i have the wireless card) to check the configuration : everything is fine.

I have a P3 with version 5.9
The IP of the P3 is fix in the router.
I use a dynamic DNS to access the P3 from external.

Any idea ?
PS: i didn't restarted the P3 for the moment, probably i must but would be fine if the problem can be solved.

thx