Best posts made by Numa09

@Sebastian-Roth
Sorry my mistake… it’s a /19… Mask is 255.255.224.0
Subnet goes from 172.16.0.1 to 172.16.31.254
As I told you other computers in the same network are working fine.
I’m now going to move a non working cpu to a working building to see what happen.
Let see if is a pc harware issue or a network one.
I keep you updated
Regards

I think I have it:
link text
Confirmed this on a 1810G-24 GE, using the last firmware (P.2.22 at this time). The “Auto DoS” feature blocks NFS : ip packets come in, but never come out from the switch.

And to notice : disabling the feature is not sufficient to make it work again. I had to do a hard factory reset (factory reset from the web gui did nothing) to make it work again.

It seems that this option is stickying somewhere in the configuration, even after disabling it !