Internet Security and Acceleration Server summary file
File type: Miscellaneous file
An ils file is a summary file used by Microsoft Internet Security and Acceleration (ISA) Server.
It contains summary information generated by ISA Server for use by the server and its administrative or reporting components.
File type category:
Miscellaneous file
Date updated: November 3, 2026
The ils file extension is associated with Microsoft Internet Security and Acceleration (ISA) Server, a network security and management product for Microsoft Windows.
ISA Server 2006 is an integrated network edge security gateway. It helps protect IT environments from Internet-based threats and provides users with fast, secure remote access to applications and data. An ils file stores summary information produced by the server rather than serving as a general-purpose document.
Because the file is an internal part of the ISA Server environment, its contents are normally used by ISA Server or related administration and reporting tools.
Open an ils file on Microsoft Windows with the Microsoft Internet Security and Acceleration Server installation that created it. The file is intended for use by ISA Server and its administrative or reporting components, not for direct editing in a text editor.
If ISA Server is not installed, there may be no suitable standalone program for opening the file. Avoid renaming or editing it, as this can prevent the associated software from using it correctly.
An ils file is an internal ISA Server summary file, so it should normally be retained and used with the ISA Server installation that created it.
If the information is needed in another form, use the reporting or administrative features of ISA Server to produce an available report rather than converting the ils file directly.
Software applications that handle other tasks involving ils files:
Microsoft Windows
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