Views:

This issue may occur due to the special file handling feature of the HTTP scanning in IWSS/IWSVA. To prevent it from occurring, you can add the relevant URLs to the scan exception list.

IWSS 3.1 for Linux & IWSVA 5.6

  1. Create a backup copy of the /etc/iscan/intscan.ini file.
  2. Open the intscan.ini file in a text editor.
  3. Under [http], add the following to the "client_skip_content" parameter for Windows Update:

    client_skip_content=Host: windowsupdate.microsoft.com,Host:
    v5.windowsupdate.microsoft.com,Host:
    v4.windowsupdate.microsoft.com,Host: download.windowsupdate.com,Host:
    windowsupdate.com,Host: office.microsoft.com,Host:
    update.microsoft.com,Host: www.download.windowsupdate.com
    For Adobe Download Manager:
    client_skip_content=Host: ardownload.adobe.com,Host:
    download.adobe.com

  4. Save and close the file.
  5. Run the following commands to restart the HTTP daemon:

    #/etc/rc#.d/S99IWSS stop
    #/etc/rc#.d/S99IWSS start

IWSS 3.1 for Windows

  1. Create a backup copy of the <IWSS installation folder>\intscan.ini file.
  2. Open the intscan.ini file in a text editor.
  3. Under [http], add the following to the "client_skip_content" parameter for Windows Update:

    client_skip_content=Host: windowsupdate.microsoft.com,Host:
    v5.windowsupdate.microsoft.com,Host:
    v4.windowsupdate.microsoft.com,Host: download.windowsupdate.com,Host:
    windowsupdate.com,Host: office.microsoft.com,Host:
    update.microsoft.com,Host: www.download.windowsupdate.com
    For Adobe Download Manager:
    client_skip_content=Host: ardownload.adobe.com,Host:
    download.adobe.com

  4. Save and close the file.
  5. Restart the Trend Micro InterScan Web Security Suite for HTTP service.