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Unable to browse websites through InterScan Web Security Virtual Appliance (IWSVA) 5.6

    • Updated:
    • 5 Feb 2016
    • Product/Version:
    • InterScan Web Security Virtual Appliance 5.6
    • Platform:
    • N/A N/A
Summary

You cannot open a website even after adding it to the Approved URLs under the HTTP Approved List. However, you can access the website when you bypass IWSVA.

Details
Public

The issue occurs because the disallow_gzip_encoding setting in the /etc/iscan/intscan.ini file is enabled. With this setting, IWSVA modifies the Accept-Encoding HTTP header and sets its value to “identity”. This means the client tells the web server that the client can accept content in identity format only and not in gzip format.

However, in some websites, the web server must use gzip format to return the data. Thus, you are unable to browse websites with contents in gzip format.

To resolve the issue, stop IWSVA from modifying the Accept-Encoding HTTP header:

  1. Open /etc/iscan/intscan.ini and set disallow_gzip_encoding to “no”.

    It should appear like this:

    disallow_gzip_encoding=no

  2. Restart the HTTP daemon.

    # /etc/iscan/S99ISproxystop
    # /etc/iscan/S99ISproxy start

  3. Clear the IE cache and access the website again.
Premium
Internal
Rating:
Category:
Configure; Troubleshoot
Solution Id:
1102414
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