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URL is blocked by InterScan Web Security Virtual Appliance (IWSVA) with the reason "Virus infected temporary block"

    • Updated:
    • 9 Sep 2018
    • Product/Version:
    • InterScan Web Security Virtual Appliance 6.0
    • InterScan Web Security Virtual Appliance 6.5
    • Platform:
    • N/A N/A
Summary

Access to a website is blocked with the a message from IWSVA giving the reason as "Virus infected temporary block".

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Details
Public

IWSVA blocks any URL that it determines to be infected and returns the message “URL is blocked” for any subsequent requests. The block will be active for 4 hours by default, although this can be configured.

To configure the default block time:

  1. Log on to IWSVA either directly or with SSH as "root".
  2. Edit the configuration file /etc/iscan/intscan.ini as described in the KB article: Editing configuration files of Linux-based products.

    Look for the parameter "infected_url_block_length" in the section [Scan-configuration] and change the value to a different number in order to change the blocking time (in hours).

  3. Restart the HTTP scanning daemon with the following commands:

    /etc/iscan/S99ISproxy stop
    /etc/iscan/S99ISproxy start

If you are confident that the detection of the URL is infected and a false positive, submit a false positive case on our Malware Support portal.

To make this blocking persistent over the service restart, the Scanning Daemon creates a temporary configuration file infectedB.ini during normal shutdown and stores the current blocking configuration in it.

It is also possible to turn off temporary URL blocking by setting disable_infected_url_block=yes in intscan.ini. However, this is not recommended because it might affect the amount of resources used by scanning the same content again and again.

Premium
Internal
Rating:
Category:
Configure; Troubleshoot
Solution Id:
1115558
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