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Skype or Adobe installer times out when UTM anti-virus is enabled on SRX

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Article ID: KB22407 KB Last Updated: 25 Jan 2012Version: 2.0
Summary:
This article describes the issue of Skype or Adobe installer file timing out, when UTM anti-virus is enabled on the SRX device.
Symptoms:
The application of the UTM trickling function to prevent the installer from timing out, due to busy anti-virus scan engine.

Cause:

Solution:
At times, when the SRX UTM AV engine is busy, the Skype or Adobe installer program or some other application, may time out when downloading the executable file.

In a full AV, SRX buffers the complete file first and then sends it over for scanning. If a busy scan engine is taking more time, then the installer could time out. Trickling, a UTM function, can prevent this from occurring. Trickling keeps sending data to the client, so that it does not time out.


Use the following command to enable trickling with a value of 5 seconds:
set security utm feature-profile anti-virus kaspersky-lab-engine profile <profile-name> trickling
set security utm feature-profile anti-virus kaspersky-lab-engine profile <profile-name> trickling timeout 5
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