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Download without Virescan and trickling slow

We use the Webgateway as a reverse Proxy. The following Problem is only relevant for large files. We have some Request which do not need to be virus-scanned, that is not a problem. We don't want to use trickling for this files because the client which downloads such files should get full speed of his Internet connection from the beginning. The Problem is that if we don't use Trickling the WebGateway still will wait to deliver the files to the clients until it has received the full file from the backend server itself. My first guess was that it does that because of the MediaType detection so we disabled that in the response cycle, too. But the result was the same. If I download a 600MB File from console the client doesn't receive a single byte of the file for the first 40sec., than it will download the file very fast. The Only way I found to get another result (full download speed from the beginning) was if I enabled a "HTTP tunnel". I don't want to do that, because we do a lot more on that ReverseProxy. One Example would be to spoof the Web server or do a rudimentary DOS Protection. I can't do that with "HTTP tunnel" because the only ruleset applied to a "HTTP tunnel" is the logging cycle. Any suggestions? Regards
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asabban
McAfee Employee
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Re: Download without Virescan and trickling slow

Hi,

there is some sort of a "flag" that is used internally within the proxy, which means "I need the complete file to proceed". This can be set by multiple properties, not only AV and Media Type detection, but also Body.Size and other properties. As soon as this property is used MWG known it needs the complete file and will do "data tricklick"; "progress pages" or just hold back the file until it is downloaded compeltely.

From what you say it looks like there is some property in use which causes MWG to need the full file. Otherwise the response should just flow through the proxy, without impact on the speed or MWG holding back the file.

Best,
Andre

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