atde4(Debian6)でsambaの設定

何も考えずにとりあえずいろいろ設定してみたら、
windowsからアクセス時に、必ず winpc\guestでパスワード聞かれてしまい。。
何を入れてもダメだし。

最終的にOKは以下の形

/etc/samba/smb.conf

[global]
workgroup = MSHOME

unix charset = UTF-8
dos charset = CP932
display charset = UTF-8

map to guest = Bad User
guest account = nobody

encrypt passwords = yes
security = share

[share]
comment = samba
path = /var/samba
public = yes
guest only = yes
guest ok = yes
guest account = nobody
share modes = yes
browsable = yes
writable = yes
create mask =644
directory mask = 755