Hi, in my network I had two samba server, one playing with authentication and one as guest-like disk share. In the pdc, I defined a few alias thus the machine was responding with different names. For an error, I didn't notice that a few alias matches a few group names used by the clients. Now, the guest-like machine has been dismissed, thus the other one has been assigned to its IP. Since that, clients are protesting saying that there's a duplicated name on the network, and I found this is a problem due to the fact that the samba server is responding with the same netbios name of a group. My question is, since the machine is running from a while, why I didn't discovered this before? Luca -- Luca Ferrari, fluca1978@infinito.it