I need help with the following please.
About once a week our server shuts down due to what I assume is flood login attempts. We get somewhere around 2000 or so attempts a day. The end result is after 5 days or so no one is able to login into this machine at all. Is there anything in windows firewall that can be enabled to deny this attack after one or two attempts. We have a firewall that could block this by ip restriction but there are many users from around the county and getting ip ranges will be difficult.
any suggestions welcome.
An account failed to log on.
Security ID: NULL SID
Account Name: -
Account Domain: -
Logon ID: 0x0
Logon Type: 3
Account For Which Logon Failed:
Security ID: NULL SID
Account Name: ADMIN
Failure Reason: Unknown user name or bad password.
Sub Status: 0xc0000064
Caller Process ID: 0x0
Caller Process Name: -
Workstation Name: \\22.214.171.124
Source Network Address: 126.96.36.199
Source Port: 54316
Detailed Authentication Information:
Logon Process: NtLmSsp
Authentication Package: NTLM
Transited Services: -
Package Name (NTLM only): -
Key Length: 0
This event is generated when a logon request fails. It is generated on the computer where access was attempted.
The Subject fields indicate the account on the local system which requested the logon. This is most commonly a service such as the Server service, or a local process such as Winlogon.exe or Services.exe.
The Logon Type field indicates the kind of logon that was requested. The most common types are 2 (interactive) and 3 (network).
The Process Information fields indicate which account and process on the system requested the logon.
The Network Information fields indicate where a remote logon request originated. Workstation name is not always available and may be left blank in some cases.
The authentication information fields provide detailed information about this specific logon request.
- Transited services indicate which intermediate services have participated in this logon request.
- Package name indicates which sub-protocol was used among the NTLM protocols.
- Key length indicates the length of the generated session key. This will be 0 if no session key was requested.