I'm running Samba 3.0.33-3.29.el5_5 on a CentOS 5.5 machine. I'm connecting to it from a Windows 7 SP1 machine. I'm using security = user and passdb backend = tdbsam . Everything works fine until I move the Windows machine to an IP address on another subnet. All networking functions still work fine on the new subnet except Samba so it's clear there is no TCP/IP problem. On the old subnet when I map the network drive I'm asked for a password. I give a password which is accepted and then I see a folder from the network share. I can open any file. When I'm on the new subnet I'm *not* asked for a password even though I give the '/user' option on the "net use" command line. Then I see the folder from the network share but I can't open any files or directories. It's as if I'm being seen as a different user that doesn't have file level permissions. I've turned off firewalls on both the Linux and the Windows machine but this didn't make any difference. What's also strange about this is that when I try connecting to the Samba share from yet another Windows 7 computer on yet another subnet, after adding it to the "hosts allow" section, then everything works fine. Does anybody have any idea what I'm doing wrong? Cordially, -- Jon Forrest Research Computing Support College of Chemistry 173 Tan Hall University of California Berkeley Berkeley, CA 94720-1460 510-643-1032 jlforrest at berkeley.edu