Author Topic: corrupt downloads  (Read 8020 times)

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SteveJ

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corrupt downloads
« on: November 03, 2005, 07:33:34 PM »
I have installed Avast 4.6 and the ISA 2004 plug-in on 3 win 2003 Sp1 servers. If I enable the virus scanning, users complain that their downloads are downloading corrupted. It is not a specific site, update.microsoft.com, hp.com (print drivers) as examples consistently fail.
Any Ideas?

kwg

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Re: corrupt downloads
« Reply #1 on: November 03, 2005, 08:10:48 PM »
Steve,

I also was being plagued with download corruption from multiple sites. This solution worked for me:

http://forum.avast.com/index.php?topic=15653.0

By the way, the corruption returned sometime later. I think that I had run the Avast repair feature, which probably overwrote the new .dll file with the original one. Installing the new .dll file once again corrected the problem.

Ken

Offline Vlk

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Re: corrupt downloads
« Reply #2 on: November 03, 2005, 08:36:46 PM »
Right. BTW the fix will be included in the next program update, due in about a week.

Thx Vlk
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SteveJ

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Re: corrupt downloads
« Reply #3 on: November 03, 2005, 09:24:47 PM »
Thank you for the update, however, i installed this fix yesterday. interestingly enough, the version of the one I replaced was the same, it did not have any effect on the corruption.

kwg

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Re: corrupt downloads
« Reply #4 on: November 03, 2005, 09:54:08 PM »
Steve,

If you are downloading a file that had been downloaded previously and corrupted, you might be retrieving the corrupted file from the ISA cache. As an experiment, you could temporarily turn off HTTP caching in ISA. If caching seems to be the cause of the continued corruption, you would then need to clear the ISA cache.

Ken

SteveJ

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Re: corrupt downloads
« Reply #5 on: November 03, 2005, 09:56:39 PM »
Great thought! Let me try that.

SteveJ

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Re: corrupt downloads
« Reply #6 on: November 03, 2005, 10:20:31 PM »
Clearing the cache on the ISA servers worked, the downloads are working fine so far.

Offline Vlk

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Re: corrupt downloads
« Reply #7 on: November 03, 2005, 10:22:24 PM »
Please note that the next reboot of the server will cause the patched file to be replaced by the original (buggy) version. That is, if you restart the server you'll need to replace the file again.

Of course, this is only the case till the update gets official (again, I expect this to happen during the next week).


Thanks
Vlk
If at first you don't succeed, then skydiving's not for you.

SteveJ

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Re: corrupt downloads
« Reply #8 on: November 08, 2005, 10:32:20 PM »
So if the new version is coming out soon, and I have to make a recommendation next week on an antivirus solution in our enterprise environment, whom do I take to lunch to get a beta version now, for testing?

Offline Vlk

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Re: corrupt downloads
« Reply #9 on: November 09, 2005, 05:09:35 PM »
You can take ME to the lunch ;) :)
As a matter of fact, I'm in the US (in Redmond) during the next week...

Anyway, I can certainly give you a beta that should have this problem solved.
Please send me an email and I'll send you a download link.


Thanks
Vlk
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Offline Lisandro

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Re: corrupt downloads
« Reply #10 on: November 09, 2005, 05:46:06 PM »
As a matter of fact, I'm in the US (in Redmond) during the next week...
Won't you betrayal us to Microsoft, will you? ;D
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