I have a strange problem on my Win 2K Adv Server(SP4). This is the domain controller. I noticed all my user accounts, including admin, are getting locked out every so often. I checked my security log and it has recorded multiple events of logon failures from a workstation outside my domain. I do not have any trusts setup. This workstation tries to logon with every username I have in the Active Directory but fails because the password is incorrect. Since I have my group Policy set up to lock out account after 3 failed attempts, the account get locked out. I know what the IP address and host name of this machine is but what can I do to restrict his system? My guest account is already disabled. Any help would be much appreciated. Thanks.
