This is my fisrt post here, I hope to be as clear as possible. Environment: Fedora Core 4 Kernel 2.4.13, Samba 3.0.14a-2. Dual NIC eth0 Gigabit and eth1 10/100. Samba working on eth0. Samba configuration: 1 share, Read/Write to all known users.3 Users defined for samba. Share chmod-ed to 777. No domains defined. Problem: Win XP clients are able to see the Samba server as long as the share name, but when trying to acces the share, the clients are prompted for a user/password combination: upon user/pass typing, none seems to be valid. Users logs in in the XP clients using the same user/password combination of the samba server: the apparently same configuration on Samba2/Red Hat9 allows wonderful sharing to the very same allowed users without password prompting. Also tested with very simple smb.conf configuration file such as: [global] workgroup = WORKGROUP map to guest = Bad user wins support = yes netbios name = Sun username map = /etc/samba/smbusers [printers] comment = All Printers path = /var/spool/samba browseable = yes printable = yes [share1] comment = Shared projects path = /samba/share1 writeable = yes browseable = yes valid users = goofy, donald, mickey ;(fictious names) With the above configuration, XP clients are still able to see the server and the share, but when trying to access the share, clients gets prompted for password but they are not allowed to read/write the share. Any hints would be greatly appreciated! Andrea Bicciolo