Please pay attention to the error messages you receive. If any error message reports that your server is being unfriendly, you should first check that your IP name resolution is correctly set up. Make sure your /etc/resolv.conf file points to name servers that really do exist.

Also, if you do not have DNS server access for name resolution, please check that the settings for your smb.conf file results in dns proxy = no . The best way to check this is with testparm smb.conf .

It is helpful to monitor the log files during testing by using the tail -F log_file_name in a separate terminal console (use ctrl-alt-F1 through F6 or multiple terminals in X). Relevant log files can be found (for default installations) in /usr/local/samba/var. Also, connection logs from machines can be found here or possibly in /var/log/samba, depending on how or if you specified logging in your smb.conf file.

If you make changes to your smb.conf file while going through these test, remember to restart smbd and nmbd.