Event-o-Pedia EventID 850 - A port was listed as an exception when the Windows Firewall started [Win 2003 / XP]

	Event Details
	Operating System->Microsoft Windows->Built-in logs->Windows 2000-2003->Security Log->Policy Change->EventID 850 - A port was listed as an exception when the Windows Firewall started [Win 2003 / XP]

EventID 850 - A port was listed as an exception when the Windows Firewall started [Win 2003 / XP]

This event is generated during the Windows Firewall start-up and documents exception rule settings for each Windows Firewall port/protocol. One event is generated per each exception rule.

Find more information about this event on ultimatewindowssecurity.com.

Corresponding events on other OS versions:

Windows 2008

EventID 4945 - A rule was listed when the Windows Firewall started

Sample:

Event Type:     Success Audit
Event Source:   Security
Event Category: Policy Change
Event ID:       850
Date:           12/16/2009
Time:           06:50:28
User:           NT AUTHORITY\SYSTEM
Computer:       DC1
Description:    
A port was listed as an exception when the Windows Firewall started.

Policy origin: Local Policy
Profile used: Standard
Interface: All interfaces
Name: NetBIOS Name Service
Port number: 137
Protocol: UDP
State: Disabled
Scope: Local subnet only

Log Type:

Windows Event Log

Uniquely Identified By:

Log Name:

Security

Filtering Field	Equals to Value
OSVersion	Windows 2003 Windows XP
Category	Policy Change
Source	Security
EventId	850

Field Matching

Field	Description	Stored in	Sample Value
DateTime	Date/Time of event origination in GMT format.	DateTime	10.10.2000 19:00:00
Source	Name of an Application or System Service originating the event.	Source	Security
Type	Warning, Information, Error, Success, Failure, etc.	Type	Success
User	Domain\Account name of user/service/computer initiating event.	User	RESEARCH\Alebovsky
Computer	Name of server workstation where event was logged.	Computer	DC1
EventID	Numerical ID of event. Unique within one Event Source.	EventId	576
Description	The entire unparsed event message.	Description	Special privileges assigned to new logon.
Log Name	The name of the event log (e.g. Application, Security, System, etc.)	LogName	Security
Category	A name for a subclass of events within the same Event Source.	Category	Logon/Logoff
Policy origin	Indicates whether Windows Firewall was getting its settings from Group Policy or the system's local policy.	InsertionString1	Local Policy
Profile used	Standard or Domain. Domain profile is applied when the computer is on its "home" network, Standard profile is applied when the computer is not connected to its "home" network, e.g. out travelling and connected to public internet via Wi-Fi.	InsertionString2	Standard
Interface	Displays Network Interface Cards this firewall setting is configured for.	InsertionString3	All interfaces
Name	Name of the service corresponding to the port number	InsertionString4	NetBIOS Name Service
Port number	Port number listed as an exception to allow traffic through	InsertionString5	137
Protocol	Protocol allowed: TCP or UDP	InsertionString6	UDP
State	State of the exception rule: Enabled or Disabled.	InsertionString7	Disabled
Scope	The IP Address and Subnet scopes to which traffic the exception rule applies.	InsertionString8	Local subnet only