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Using the "client_skip_content" and "server_skip_content" parameters in the intscan.ini file

    • Updated:
    • 24 Nov 2016
    • Product/Version:
    • Interscan Web Security Suite 3.1
    • InterScan Web Security Suite 3.1 Linux
    • InterScan Web Security Suite 3.1 Windows
    • Platform:
    • Linux - Red Hat RHEL 4 32-bit
    • Linux - Red Hat RHEL 5 32-bit
    • Linux - Red Hat RHEL 6 32-bit
    • Linux - SuSE version 10
    • Unix - Solaris (Sun) version 10 (SunOS 5.10)
    • Windows 2003 Enterprise Server
    • Windows 2003 Standard Server Edition
    • Windows 2008 Enterprise
    • Windows 2008 Standard

Skip various content scanning features in the HTTP service using the two parameters: "client_skip_content" and "server_skip_content". These can be used when there are unnecessary content scanning such as access of intranet resources.


You can configure the following parameters in the intscan.ini file:

  • client_skip_content=
  • client_skip_content_sp=
  • server_skip_content=
  • server_skip_content_sp=

The parameters ending in "_sp" are used to separate multiple entries. Their default value is a comma (,). Below is an example:

client_skip_content=User-Agent: NSPlayer, User-Agent: Windows-Media-Player, User-Agent: RMA, User-Agent: QuickTime

To use a different separator, change the value of the parameter similar to the example below for "client_skip_content_sp=;":

client_skip_content=User-Agent: NSPlayer; User-Agent: Windows-Media-Player; User-Agent: RMA; User-Agent: QuickTime

"Client_skip_content" is used to skip scanning a reply originating from a specific request. It only checks for a matched string in the client request. On the other hand, the "Server_skip_content" only matches the strings in the server response.

An example of this scenario is allowing content with streaming media. You go to to listen to the web radio. When you click a button to start listening, the system will realize that the browser cannot display the content. It needs a Windows Media Player as browser plug-in and then the Media Player will try to access the browser and request the following:

GET /radio1-low.mp3?wmcache=0 HTTP/1.1
Accept: */*
User-Agent: NSPlayer/ WMFSDK/9.0
Accept-Encoding: gzip, deflate
Connection: Keep-Alive
HTTP/1.0 200 OK
Content-Type: audio/mpeg
icy-description:Radio 1 - low
icy-name:Radio 1 - low
Server: Icecast 2.3.1

Therefore, to skip scanning the requested data, you can set the parameter to "client_skip_content= User-Agent: NSPlayer".

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