Event ID - 18

Event Id18
SourceMicrosoft-Windows-HttpEvent
DescriptionAttempted to reserve URL (%1). Status %2. This event can be benign or yellow, depending on whether the status is Succeed or Failed.
Event InformationAccording to Microsoft :
Cause
This event is logged when user made an attempt to reserve URL..
Resolution
Add a URL reservation
To add a URL reservation for your server application:
1.Click Start, point to All Programs, click Accessories, right-click Command Prompt, click Run as administrator, and then click Continue.
2.Type netsh http add urlacl.
add urlacl
Reserves the specified URL for non-administrator users and accounts. The discretionary access control list (DACL) can be specified by using a Windows NT account name with the listen and delegate parameters, or by using a security descriptor definition language (SDDL) string.
Verify
To verify the ACLs for your server application's URL exist:
1.Click Start, point to All Programs, click Accessories, right-click Command Prompt, click Run as administrator, and then click Continue.
2.Type netsh http show urlacl, and verify that the ACLs for the application's URL exist.
To see which applications are listening on the same port as your server application:
1.Click Start, point to All Programs, click Accessories, right-click Command Prompt, click Run as administrator, and then click Continue.
2.Type netstat -ba and verify that the IP Listen List exists.
Reference LinksEvent ID 18 from Source Microsoft-Windows-HttpEvent

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