Samba stopped NT authentication

[Sam Nickerson]

My Sambe server has been up for a few months without isssue. About a
week ago the share has become inaccessable. When trying to connect it
now pops a username/password box for the user to authenticate. I can
ping the machine from an NT machine with WINS resolution turned on so
I figure the NMB is working, so could it have lost its link to the PDC?
I am using Redhat 6.1 with Samba 2.0.5a. Also, is there a way to create
a share for users outside the domain to connect to for file uploads? I
would be happy with everyone having write access, but once the file is
written none can overwrite (since I am behind a firewall). I use SWAT to
configure as I am no SAMBA guru.

Thanks for your time,
Sam

The smb.conf file is below:

# Global parameters
   [global]
           workgroup = RAV26261
           netbios name = SCRIBE
           netbios aliases =
           server string = Archive File Server
           interfaces =
           bind interfaces only = No
           security = DOMAIN
           encrypt passwords = Yes
           update encrypted = No
           allow trusted domains = Yes
           hosts equiv =
           min passwd length = 5
           map to guest = Never
           null passwords = No
           password server = its2, arachne
           smb passwd file = /etc/smbpasswd
           root directory = /
           passwd program = /bin/passwd
           passwd chat = *old*password* %o\n *new*password* %n\n
*new*password* %n\n *changed*
           passwd chat debug = No
           username map =
           password level = 0
           username level = 0
           unix password sync = No
           restrict anonymous = No
           use rhosts = No
           log level = 1
           syslog = 1
           syslog only = No
           log file = /var/log/samba/log.%m
           max log size = 50
           timestamp logs = Yes
           protocol = NT1
           read bmpx = No
           read raw = Yes
           write raw = Yes
           nt smb support = Yes
           nt pipe support = Yes
           nt acl support = Yes
           announce version = 4.0
           announce as = NT
           max mux = 50
           max xmit = 65535
           name resolve order = lmhosts host wins bcast
           max packet = 65535
           max ttl = 259200
           max wins ttl = 518400
           min wins ttl = 21600
           time server = No
           change notify timeout = 60
           deadtime = 0
           getwd cache = Yes
           keepalive = 300
           lpq cache time = 10
           max disk size = 0
           max open files = 10000
           read prediction = No
           read size = 16384
           shared mem size = 1048576
           socket options = TCP_NODELAY
           stat cache size = 50
           load printers = Yes
           printcap name = /etc/printcap
           printer driver file = /etc/printers.def
           strip dot = No
           character set =
           mangled stack = 50
           coding system =
           client code page = 850
           stat cache = Yes
           domain groups =
           domain admin group =
           domain guest group =
           domain admin users =
           domain guest users =
           machine password timeout = 604800
           add user script =
           delete user script =
           logon script =
           logon path = \\%N\%U\profile
           logon drive =
           logon home = \\%N\%U
           domain logons = No
           os level = 0
           lm announce = Auto
           lm interval = 60
           preferred master = No
           local master = Yes
           domain master = No
           browse list = Yes
           dns proxy = No
           wins proxy = No
           wins server = 166.34.51.244
           wins support = No
           kernel oplocks = Yes
           ole locking compatibility = Yes
           oplock break wait time = 10
           smbrun = /usr/bin/smbrun
           config file =
           preload =
           lock dir = /var/lock/samba
           default service =
           message command =
           dfree command =
           valid chars =
           remote announce =
           remote browse sync =
           socket address = 0.0.0.0
           homedir map =
           time offset = 0
           unix realname = No
           NIS homedir = No
           panic action =
           comment =
           path =
           alternate permissions = No
           revalidate = No
           username =
           guest account = nobody
           invalid users =
           valid users =
           admin users = snickerson
           read list =
           write list =
           force user =
           force group =
           read only = Yes
           create mask = 0744
           force create mode = 00
           security mask = 037777777777
           force security mode = 037777777777
           directory mask = 0755
           force directory mode = 00
           directory security mask = 037777777777
           force directory security mode = 037777777777
           guest only = No
           guest ok = No
           only user = No
           hosts allow =
           hosts deny =
           status = Yes
           max connections = 0
           min print space = 0
           strict sync = No
           sync always = No
           print ok = No
           postscript = No
           printing = bsd
           print command = lpr -r -P%p %s
           lpq command = lpq -P%p
           lprm command = lprm -P%p %j
           lppause command =
           lpresume command =
           queuepause command =
           queueresume command =
           printer name =
           printer driver = NULL
           printer driver location =
           default case = lower
           case sensitive = No
           preserve case = Yes
           short preserve case = Yes
           mangle case = No
           mangling char = ~
           hide dot files = Yes
           delete veto files = No
           veto files =
           hide files =
           veto oplock files =
           map system = No
           map hidden = No
           map archive = Yes
           mangled names = Yes
           mangled map =
           browseable = Yes
           blocking locks = Yes
           fake oplocks = No
           locking = Yes
           mangle locks = Yes
           oplocks = Yes
           level2 oplocks = No
           oplock contention limit = 2
           strict locking = No
           share modes = Yes
           copy =
           include =
           exec =
           postexec =
           root preexec =
           root postexec =
           available = Yes
           volume =
           fstype = NTFS
           set directory = No
           wide links = Yes
           follow symlinks = Yes
           dont descend =
           magic script =
           magic output =
           delete readonly = No
           dos filetimes = No
           dos filetime resolution = No
           fake directory create times = No

   [archive]
           comment = File Archive
           path = /home/samba/archive