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Consumer Products => Avast Free Antivirus / Premium Security (legacy Pro Antivirus, Internet Security, Premier) => Topic started by: Zai on January 08, 2014, 10:27:51 PM

Title: Avast Web Shield slowing down/blocking Dropbox uploads
Post by: Zai on January 08, 2014, 10:27:51 PM
Hi Avast team and community,

in the last week I have noticed that Dropbox uploads (especially from the Dropbox Desktop App) are immensely slow or not working while my internet connection upload speed seems to be fine. (Dropbox downloads are instantaneous as always.)

Symptoms: I drag something into my dropbox folder, for example a 15 MB picture, and it appears to start synching. The Dropbox application reports ridiculous upload speeds of several thousand kB per second, but nothing gets uploaded - the synch just hangs there (I checked the clock - way more than half an hour, then I gave up). Sometimes something gets uploaded after a long while, but most of the time, it just appears to hang indefinitely.

I suspected Avast and played around with it a little bit - if I close Dropbox, then disable Avast's Web Shield, then start Dropbox again, file uploading works as expected (15 MB take about a minute). Once I restart Web Shield, the uploading hangs again.

My system is Windows 7 x64, I'm running the newest Dropbox version (2.6.2) after completely uninstalling and reinstalling it. My Avast version is 2014.9.0.2011.

I found postings in the Dropbox forum where several people report problems that sound suspiciously like mine: https://forums.dropbox.com/topic.php?id=109525&replies=28#post-584274 and, more importantly, https://forums.dropbox.com/topic.php?id=109264 .
 
The suggested workarounds in the second link of adding the Dropbox folder paths to "status"->"antivirus"->"exclusions"->"directories" do not seem to work for me. Closing Dropbox, disabling Web Shield, restarting Dropbox always does the trick. However, I'm not too fond of the idea to disable Web Shield all the time.

Please tell me a (useful) workaround or try to fix this! It makes Dropbox completely unusable for me! :|

(I'm sorry if this was already reported, but I didn't find anything when I looked and searched!)

Yours
Anne
Title: Re: Avast Web Shield slowing down/blocking Dropbox uploads
Post by: markinson on January 08, 2014, 11:21:18 PM
Hi all and sorry for my English.
I have just  the same problems (and quite the same configuration) described above.

But I solved "my" issues totally excluding the directory C:\Users\USER\dropbox\* by Avast! antivirus controls, as described here: https://forums.dropbox.com/topic.php?id=109264

Anyway I hope this bug will be eliminated, as soon as possible.

Thank you for your attention.
Title: Re: Avast Web Shield slowing down/blocking Dropbox uploads
Post by: Zai on January 14, 2014, 12:25:43 AM
This bug is still not fixed. :| Is there anything I could do to bring it to the attention of the avast team?
Title: Re: Avast Web Shield slowing down/blocking Dropbox uploads
Post by: Drake on January 14, 2014, 03:49:17 AM
I just signed up to report a similar experience, hope adding it in this thread is alright (seems like the same bug).

Sometime late last week I started experience intermittent problems connecting to certain websites, specifically I'd get served what appeared to be blank pages (but looking at the source revealed there was indeed HTML etc present).  Sometimes reloading the page a few times would fix the issue; sometimes it would produce only a partially loaded/rendered page; it would also sometimes corrupt images.  Additionally, I began experiencing connectivity issues with MSN Messenger (using Trilliam IM), but Skype and others worked fine.

I proceeded to do a lot of troubleshooting (I have 20 years in IT, I occasionally have some clue what I'm doing): I originally felt it was a firewall issue but I finally traced the problem to Avast's Web Shield.  It wasn't doing this before, so I can only conclude something changed in the last update (which I vaguely remember installing last week).

Shutting down Web Shield fixed the issue.  Shutting down individual components of web shield did not.  I've now reinstalled Avast without the Web Shield module and everything is back to normal.
Title: Re: Avast Web Shield slowing down/blocking Dropbox uploads
Post by: olddog on January 14, 2014, 05:08:40 AM
Sometime late last week I started experience intermittent problems connecting to certain websites, specifically I'd get served what appeared to be blank pages (but looking at the source revealed there was indeed HTML etc present).  Sometimes reloading the page a few times would fix the issue; sometimes it would produce only a partially loaded/rendered page; it would also sometimes corrupt images.  Additionally, I began experiencing connectivity issues with MSN Messenger (using Trilliam IM), but Skype and others worked fine.

I proceeded to do a lot of troubleshooting (I have 20 years in IT, I occasionally have some clue what I'm doing): I originally felt it was a firewall issue but I finally traced the problem to Avast's Web Shield.  It wasn't doing this before, so I can only conclude something changed in the last update (which I vaguely remember installing last week).

Shutting down Web Shield fixed the issue.  Shutting down individual components of web shield did not.  I've now reinstalled Avast without the Web Shield module and everything is back to normal.

Not really a lot of use without vital information as to what operating system is involved, or exactly what version of Avast you have. Your reference to firewall does not say whether it is an Avast firewall, or a third party firewall.

Anyhow, if your OS is Win 7 or above, I suggest you read the thread at http://forum.avast.com/index.php?topic=143211.0 That contains at least two possible fixes for the Web shield.  If you are using XP then forget it, because the fixes don't apply.

Whilst I personally don't have the browser AOS addons installed, I wouldn't recommend running without the Web Shield enabled.
Title: Re: Avast Web Shield slowing down/blocking Dropbox uploads
Post by: Darkmoon on January 15, 2014, 06:17:00 PM
I have a similar problem.
As I work from home I have to log in to the system of my employer and also use FTP-access to upload/download files. Everything was fine up to one of the last updates. Logging into the system sometimes takes minutes and sometimes I have to retry it several times. Getting the folder structure in the FTP-program doesn't work anymore, thus I cannot upload/download files.
When I disable the the Web Shield everything is working great again.
I also noticed that I cannot use a speedtest for my internet connection anymore when the Web Shield is active. It seems that every upload is blocked by the Web Shield.

I'm using Windows 8.1
Title: Re: Avast Web Shield slowing down/blocking Dropbox uploads
Post by: polonus on January 15, 2014, 06:29:50 PM
Could it be because of redirects like this one for example: https://www.dropbox.com/downloading?src=index redirects to https://www.dropbox.com/install?src=index
This scam malware is being blocked by avast! http://support.clean-mx.de/clean-mx/portals?id=2731585
Long overdue malware up and active and now running for 2812.5 hours.
That server there is being abused and misused! See safe Scam Viewer: http://support.clean-mx.de/clean-mx/view_portalscontent.php?id=2731585&url=https%3A%2F%2Fwww.dropbox.com%2Fs%2Frhlwt3xbhp2zw4y%2Fz508B2.html
Ask the dropbox folks to cleanse this. It is a valid detection. Sloppy IT is at the root of a lot of problems!

Chinese hackers and other malcreants, trojan downloaders all do their mean deals at dropbox, read: http://www.techrepublic.com/blog/it-security/dropsmack-using-dropbox-to-steal-files-and-deliver-malware/   link article author: Michael Kassner

polonus
Title: Re: Avast Web Shield slowing down/blocking Dropbox uploads
Post by: Drake on January 15, 2014, 09:10:59 PM
Not really a lot of use without vital information as to what operating system is involved, or exactly what version of Avast you have. Your reference to firewall does not say whether it is an Avast firewall, or a third party firewall.

Anyhow, if your OS is Win 7 or above, I suggest you read the thread at http://forum.avast.com/index.php?topic=143211.0 That contains at least two possible fixes for the Web shield.  If you are using XP then forget it, because the fixes don't apply.

Whilst I personally don't have the browser AOS addons installed, I wouldn't recommend running without the Web Shield enabled.

Thanks for the reply. 

OS is Win 7 x64 SP1 (updates kept up to date); Avast is 2014.9.0.211 (latest patch applied, aswstm.sys is ..265).

Several firewalls were in play while I was testing: most used was an old ZoneAlarm (version 9.x) which I still had the install for and trusted as working properly.  I also used the latest version of Comodo Firewall (6.3.x) which is what I'm back on now (see below).

As outlined in thread you linked, I've reinstalled the Web Shield module and ensured the latest version (265) was in use: the problem re-appeared; I proceeded to apply the "UseStreamFilter=0" change in webshield.ini and am currently testing that: preliminary results would appear this action corrected the problem. Testing is ongoing.  If everything looks normal I'll try installing the updated aswStreamFilter.dll.

Another, apparently related issued I've noticed when Web Shield is enabled -- and the reason I'd originally uninstalled Comodo -- is its cmdagent.exe process seems to get stuck at times, using a steady 50% CPU load (obviously this is totally unacceptable, so not knowing what the problem was at the time I dumped Comodo).  After disabling Web Shield I reinstalled Comodo and low and behold, it was functioning properly (tested for 24+ hrs -- which is plenty, usually it racked up hours of CPU Time in that timeframe). Keeping an eye on cmdagent.exe's CPU usage is now part of my testing for Web Shield fixes.

The "UseStreamFilter=0" solution appears to have corrected that issue as well.  I see some small spikes of CPU usage that weren't happening when Web Shield was disabled, but nothing excessive so far.  But there's definitely some interaction going on there. (note that I'm not 100% sure what it is cmdagent.exe actually does as it keeps "doing stuff" even with all the Comodo modules disabled).
Title: Re: Avast Web Shield slowing down/blocking Dropbox uploads
Post by: olddog on January 15, 2014, 10:28:45 PM
OS is Win 7 x64 SP1 (updates kept up to date); Avast is 2014.9.0.211 (latest patch applied, aswstm.sys is ..265).

Still not sure whether you are using the free version of Avast (which doesn't have a firewall componenty) or one of the paid versions that does.  If it is the latter, I would disable the firewall whilst you are using the Comodo one.

Quote
Several firewalls were in play while I was testing: most used was an old ZoneAlarm (version 9.x) which I still had the install for and trusted as working properly.  I also used the latest version of Comodo Firewall (6.3.x) which is what I'm back on now..
There are reports elsewhere in the forum that suggest there might be some compatability issues with ZoneAlarm, but a number of users have reported they don't have an problems running Avast with the latest Comodo Firewall

Quote
Testing is ongoing.  If everything looks normal I'll try installing the updated aswStreamFilter.dll.
Don't forget when you do to remove the "UseStreamFilter=0" change

Please post back your results when you have tried the aswStreamFilter.dll change.
Title: Re: Avast Web Shield slowing down/blocking Dropbox uploads
Post by: lukor on January 15, 2014, 10:36:45 PM
Could you try the latest beta?http://forum.avast.com/index.php?topic=144768.0

Edit: fixed the link
Title: Re: Avast Web Shield slowing down/blocking Dropbox uploads
Post by: Drake on January 16, 2014, 01:04:23 AM
Olddog, my appologies:  I'm using the free version of Avast without the firewall (and also the free version of Comodo without the AV).

During my testing with Zone Alarm (free) I had no issues, but it was an old version (9.x; current is 12 if I'm not mistaken).  I opted for the older version because I don't like some of the functionality changes in the newer version and I'd run it with previous versions of Avast on another machine previously, without problems.



Just to update my current testing:

Those CPU usage spikes with Comodo's cmdagent kept happening, more than with Web Shield disabled; it didn't take long to see this was occurring way more than usual (racked up 10 minutes of CPU time in only a few hours).  So I installed the newer version of aswStreamFilter.dll (yes, did remove  "UseStreamFilter=0" ) and now everything is 100%.  Browser and IM functionality is flawless, and cmdagent is behaving normally (by way of comparison, uptime is now 4 hours and its CPU Time is 4 seconds).

So as far as my problem is concerned, version 9.0.2194.269 of aswStreamFilter is a winner.



@Lukor, I will try the patch tomorrow and report back. Thanks!
Title: Re: Avast Web Shield slowing down/blocking Dropbox uploads
Post by: CraigB on January 16, 2014, 01:08:28 AM
Could you try the latest beta?
http://forum.avast.com/index.php?topic=143211.new
That link isn't pointing to the new beta lukor, this one will http://forum.avast.com/index.php?topic=144768.msg1049924
Title: Re: Avast Web Shield slowing down/blocking Dropbox uploads
Post by: Drake on January 16, 2014, 03:49:55 AM
Quick update, seems I may have spoken too soon.

After several hours of everything working flawlessly, I had to reboot (reinstalled my scanner); upon reboot some websites wouldn't load properly again (however, cmdagent.exe does not appear to be using CPU excessively, not even small spikes).

Disabling Web Shield fixes the problem.  I checked aswStreamFilter, still version 9.0.2194.269 installed.  I tried the "UseStreamFilter=0" config, this time it made absolutely no difference (still with aswStreamFilter 269).

Very strange.

Also because I've been re-opening the same websites to test, I can tell that with Web Shield active they do load slightly more slowly).  This is only when broken, when Web Shield is off its fine and when 260 was working good it was also full speed.

I guess I will try the new beta next!
Title: Re: Avast Web Shield slowing down/blocking Dropbox uploads
Post by: Drake on January 16, 2014, 07:12:00 PM
Well, first of all my apologies, I feel like I've hijacked this thread with my own posts/observations.  Hopefully the solutions that worked for me will at least also be of use to Zai and others.

So I installed the beta (..2012) this morning and it seemed to behave well.  I rebooted a few times and then proceeded to update some drivers (with more reboots), waiting about an hour between each to see if anything abnormal started happening: so far the beta is behaving flawlessly; no adverse interactions with Comodo Firewall (cmdagent.exe), all websites (http and https) are loading quickly and without glitches, no problems with IM connectivity; also seemed several emails with nefarious attachments got past my spam filter today and Avast, as usual, did a splendid job of catching them as soon as they downloaded, so everything seems to be working fine on that front as well.

I will continue testing but so far the beta gets a thumbs up.


Title: Re: Avast Web Shield slowing down/blocking Dropbox uploads
Post by: Zai on January 16, 2014, 10:46:58 PM
Thanks for that info Drake... I won't be able to install the beta right now, but let's hope that if the WebShield is working for you in the beta it will also work for the Dropbox problem when it's finally distributed... xD
Title: Re: Avast Web Shield slowing down/blocking Dropbox uploads
Post by: OliPicard on January 16, 2014, 11:29:34 PM
Hi Guys, I have had issues uploading files to dmcloud and sproutvideo. when uploading files I have found the upload speeds have become unrealistic and have caused my computer to think it is running on a ultra fast connection. The fact remains this isn't true and I discovered the Web Shield was causing the problems. I installed the latest beta 2012 however this has not fixed the shield in fact its caused the avast UI to crash even more.


I just wanted to let you know your not alone with this problem. Hopefully Avast will fix this as soon as possible.


Title: Re: Avast Web Shield slowing down/blocking Dropbox uploads
Post by: Drake on January 17, 2014, 05:19:19 AM
After a full day running the 2014.9.0.2012 beta, doing a few software installs/updates and some driver updates, lots of resets, visiting extra websites to get updates (in addition to my usual batch I was visiting to test before), everything seems 100%.

Title: Re: Avast Web Shield slowing down/blocking Dropbox uploads
Post by: Parabell on January 17, 2014, 05:43:31 PM
sadly not here :-(

I noticed, that trying to use webupload to different sites show the same
problems as Dropbox uploads - first incredible speed, but no uploading
after all.

I tried repairing, the fix, the beta, but only deactivating web shield helps -
but also that makes in 70% a freeze of Avast.

I am quite busy with rebooting my computer all the time, till I finally get
the f****** webshield down.

Title: Re: Avast Web Shield slowing down/blocking Dropbox uploads
Post by: salvego on January 17, 2014, 07:40:23 PM
I'm getting the exact same problem here.

I had to uninstall Avast to make my dropbox work again.
Title: Re: Avast Web Shield slowing down/blocking Dropbox uploads
Post by: OliPicard on January 17, 2014, 08:06:38 PM
Hi Guys, I am compiling logs to send off to Avast. I have created a forum topic in the Beta Forum with the hopes of getting this fixed for everyone.

Title: Re: Avast Web Shield slowing down/blocking Dropbox uploads
Post by: lukor on January 17, 2014, 09:43:57 PM
Hello Guys,
it seems this is really caused by the nature of the WebShield implementation. The super-fast upload phase is caused by the fact, the until avast buffers are filled, the data is consumed by WebShield, scanned and then passed onto the network. There the speed should be appropriate to your network speed, however since the application (dropbox) has already sent quite a lot of bytes, it would seem as stalled for a while. In total, the speed shouldn't be affected, the total time should be the same, however you could see these super-fast bursts. We haven't experienced any complete stalls or aborted uploads though. We will look into this and post you soon.


Sorry guys,
Lukas.
Title: Re: Avast Web Shield slowing down/blocking Dropbox uploads
Post by: Hemispasm on January 19, 2014, 01:26:35 AM
Just posting to confirm the same problem with Dropbox (version 2.4.11) and the latest version of AVAST. Disabling the Web Shield fixes the problem. Also I tried to test Lukor's statement that in the long run there should be no difference in the total time of uploading, I tried with a 50 mb file, it never got uploaded with the Shield on, so the problem is there for good.

Hopefully you guys at Avast will fix this, you have a great product so the skills are there :-)
Title: Re: Avast Web Shield slowing down/blocking Dropbox uploads
Post by: OliPicard on January 19, 2014, 03:46:52 PM
Just posting to confirm the same problem with Dropbox (version 2.4.11) and the latest version of AVAST. Disabling the Web Shield fixes the problem. Also I tried to test Lukor's statement that in the long run there should be no difference in the total time of uploading, I tried with a 50 mb file, it never got uploaded with the Shield on, so the problem is there for good.

Hopefully you guys at Avast will fix this, you have a great product so the skills are there :-)

Can also confirm that the INI editing isnt helping the problem. the only way to fix the issue is to disable web shield.
Title: Re: Avast Web Shield slowing down/blocking Dropbox uploads
Post by: Zai on January 19, 2014, 10:27:25 PM
I also confirm what Hemispasm said: The upload time with Web Shield on is NOT the same as with Web Shield off: It either doesn't get uploaded at all or after a MUCH longer time as with Web Shield off. It's not just a problem of Dropbox reporting wrong upload times because of a packet buffer, Web Shield actually appears to block the uploading in some way. :( I'm really kind of disappointed here, avast! 2014 seems so buggy compared to the previous version :(
Title: Re: Avast Web Shield slowing down/blocking Dropbox uploads
Post by: OliPicard on January 20, 2014, 09:59:49 PM
I also confirm what Hemispasm said: The upload time with Web Shield on is NOT the same as with Web Shield off: It either doesn't get uploaded at all or after a MUCH longer time as with Web Shield off. It's not just a problem of Dropbox reporting wrong upload times because of a packet buffer, Web Shield actually appears to block the uploading in some way. :( I'm really kind of disappointed here, avast! 2014 seems so buggy compared to the previous version :(

I agree there needs to be more work done with the new web shield. New features have to be deployed but it would be good if they where tested on different network environments before pushing out new updates. I am currently waiting for AVAST to fix this. Its reducing my productivity and Ive been unable to upload content. Hopefully we can get this fixed soon.
Title: Re: Avast Web Shield slowing down/blocking Dropbox uploads
Post by: Drake on January 20, 2014, 11:31:10 PM
Curious, did you guys try the beta (version 2014.9.0.2012) and still encounter the problem with Dropbox?

If not, maybe try it; during my tests I never got a good "fix" (including the modified aswStreamFilter file) until I updated to that new beta.

http://forum.avast.com/index.php?topic=144768.msg1049924

Title: Re: Avast Web Shield slowing down/blocking Dropbox uploads
Post by: Hemispasm on January 21, 2014, 01:17:19 AM
Drake unfortunately the problem is still there even after updating to the latest beta version.
Title: Re: Avast Web Shield slowing down/blocking Dropbox uploads
Post by: OliPicard on January 21, 2014, 01:34:10 PM
Curious, did you guys try the beta (version 2014.9.0.2012) and still encounter the problem with Dropbox?

If not, maybe try it; during my tests I never got a good "fix" (including the modified aswStreamFilter file) until I updated to that new beta.

http://forum.avast.com/index.php?topic=144768.msg1049924

Still having problems with uploading even switched to proxy mode to no avail. Clean install of beta didn't fix the issue it's down to a hardware buffering issue with the windows API and the implementation of it. Avast's shields assume you have a fast enough connection to buffer all the web requests when uploading files.  Would be good to get an update on what's happening at Avast.
Title: Re: Avast Web Shield slowing down/blocking Dropbox uploads
Post by: OliPicard on January 21, 2014, 11:07:54 PM
Glad to say that Avast has a patch which should fix this issue with uploads. It should be inbound to both the beta and normal avast client in a week.
Title: Re: Avast Web Shield slowing down/blocking Dropbox uploads
Post by: Hemispasm on January 22, 2014, 04:06:45 PM
That is good to know! Any chance we can download/apply just this patch sooner?
Title: Re: Avast Web Shield slowing down/blocking Dropbox uploads
Post by: lukor on January 23, 2014, 12:19:02 AM
That is good to know! Any chance we can download/apply just this patch sooner?


[size=0pt]Version update with this fix has just been released. [/size]
[size=0pt]Lukas. [/size]
Title: Re: Avast Web Shield slowing down/blocking Dropbox uploads
Post by: Hemispasm on January 23, 2014, 12:30:48 AM
Hi Lukor and thank you for the newsflash  :)

However, I am currently running the latest beta version and when I tried to update it shows I have the latest version. Should I perform a clean full installation of the latest version available for download at the Avast website (which version would that be btw?) or is this fix available only as a partial update?
Title: Re: Avast Web Shield slowing down/blocking Dropbox uploads
Post by: iroc9555 on January 23, 2014, 12:51:00 AM
Since you are running BETA, it would be better to do a clean install. Run the avastclear beta program first.
avast! cleaner: http://files.avast.com/beta9x/avastclear.exe

Then install the new avast! 9.0.2013
http://forum.avast.com/index.php?topic=145192.msg1053273#msg1053273

Note. Download the new program first to have it at hand then remove the BETA version. Install the new version.

Title: Re: Avast Web Shield slowing down/blocking Dropbox uploads
Post by: Hemispasm on January 23, 2014, 01:10:49 AM
Since you are running BETA, it would be better to do a clean install. Run the avastclear beta program first.
avast! cleaner: http://files.avast.com/beta9x/avastclear.exe

Then install the new avast! 9.0.2013
http://forum.avast.com/index.php?topic=145192.msg1053273#msg1053273

Note. Download the new program first to have it at hand then remove the BETA version. Install the new version.
Just did a clean install of the new avast and I can confirm that the dropbox issue is now gone.

Thank you all at Avast for jumping quickly onto this issue - comes to prove you're doing a great job! And thanks to all the people that invested the time and effort to report and help others in this thread, much appreciated.  :)
Title: Re: Avast Web Shield slowing down/blocking Dropbox uploads
Post by: Zai on January 23, 2014, 06:15:01 PM
I got the fix with the latest update - Dropbox uploads are working again for me! Thanks everyone who helped here and behind the scenes!
Title: Re: Avast Web Shield slowing down/blocking Dropbox uploads
Post by: can00k on March 25, 2014, 03:55:01 AM
I downloaded the newest Avast update this weekend (2014.9.0.2016) and this appears to be a problem again.  I had a file try to sync last night before going to bed, and realized this afternoon that it was still going and my connection was super slow.  Looks like this bug is back again.
Title: Re: Avast Web Shield slowing down/blocking Dropbox uploads
Post by: LurkerBoy on March 25, 2014, 10:21:27 AM
I suspect that the problem is returned again!

I have Win7 64bit + Dropbox 2.6.26 + Avast 2014.9.0.2016 [all full updated!] and a lot of synchronized file (more than 10GB).

The problem is that Dropbox is hanged with less of 20 files to be synchronized (less than 200MB) but in more than 10 days it was not able to complete the process!

And the ADSL Bandwith is more or less fully wasted!

The problem started with the previous release of Avast and the update had no effect. Also the temporay deactivation of Avast seems to be useless.

I have performed all the suggestion from the Dropbox help, but no effect!!!!!!

Any suggestion?

Thank you all in advance!
Title: Re: Avast Web Shield slowing down/blocking Dropbox uploads
Post by: can00k on March 25, 2014, 01:33:46 PM
Adding *dropbox.com to the exclusion list doesn't help, nor does actually closing Dropbox or temporarily disabling the web shield.  It seems that once you try to synchronize a file, the process can't be stopped without a restart of the computer.  My bandwidth usage was CRAZY yesterday.  What can it possibly be uploading when Dropbox is closed?  I notice my Avast icon in the system tray going nuts but I don't understand what data is even being transferred, or why it would be.

I'm running Dropbox v2.4.11
Title: Re: Avast Web Shield slowing down/blocking Dropbox uploads
Post by: can00k on March 26, 2014, 01:19:56 PM
I was advised by Avast support to try a repair of Avast and if that doesn't work, a full uninstall/reinstall.  I don't expect either of these things to work, but I'll try it later this week or this weekend and update this thread.
Title: Re: Avast Web Shield slowing down/blocking Dropbox uploads
Post by: LurkerBoy on March 27, 2014, 12:45:04 PM
I was advised by Avast support to try a repair of Avast and if that doesn't work, a full uninstall/reinstall.  I don't expect either of these things to work, but I'll try it later this week or this weekend and update this thread.

I am disappointed to tell you that I have already performed all the steps suggested to you by Avast Support but, as you already imagine, without success!
Today there is a new Dropbox version (2.6.27).
This evening I will try it.
And I will upgrade this item.

Have you find other forum with this topic?
Title: Re: Avast Web Shield slowing down/blocking Dropbox uploads
Post by: can00k on March 29, 2014, 11:08:39 PM
I was advised by Avast support to try a repair of Avast and if that doesn't work, a full uninstall/reinstall.  I don't expect either of these things to work, but I'll try it later this week or this weekend and update this thread.

I am disappointed to tell you that I have already performed all the steps suggested to you by Avast Support but, as you already imagine, without success!
Today there is a new Dropbox version (2.6.27).
This evening I will try it.
And I will upgrade this item.

Have you find other forum with this topic?

I don't see another forum topic about this.

I updated Dropbox today (to v2.6.27) and repaired Avast and this continues to be a problem.   I can't continue to use Avast if I have to restart my computer every time Dropbox needs to sync.
Title: Re: Avast Web Shield slowing down/blocking Dropbox uploads
Post by: can00k on March 30, 2014, 04:48:59 PM
I've now limited my Dropbox upload to 10KB/s and it seems to have made the problem bearable.   But now my Dropbox uploads are stretched over a much longer period of time.
Title: Re: Avast Web Shield slowing down/blocking Dropbox uploads
Post by: Thumbsy on March 31, 2014, 06:13:16 PM
I too am suffering from the return of this issue since the update to 2014.9.0.2016.

Both uploading and downloading through Dropbox is being affected significantly.
The issue is not limited to dropbox only though. I also find myself having uploading issues with some filehosters and other applications/websites that involve uploading files.

Very frustrating  :(
Title: Re: Avast Web Shield slowing down/blocking Dropbox uploads
Post by: maurograuso@gmail.com on April 01, 2014, 01:49:47 PM
I confirm the same identical issue with the following setup:

Avast! 2014.9.0.2016
Dropbox 2.6.2 AND also 2.6.27
Windows7 64Bit home Editiom

I hope in a very quick fix from Avast!. This fault is really major, not only impacting the use of Dropbox but also of the local connectivity and I believe it affects a huge percentage of Avast! users (anyome using Dropbox I suppose).


Title: Re: Avast Web Shield slowing down/blocking Dropbox uploads
Post by: can00k on April 03, 2014, 04:39:48 AM
Had time the other day to do a full uninstall/reinstall of Avast and things are better now.  However, I have left the Dropbox upload throttle at 10kb/sec, so I don't know if the Avast reinstall really did anything or not.
Title: Re: Avast Web Shield slowing down/blocking Dropbox uploads
Post by: Thumbsy on April 03, 2014, 07:29:18 PM
Had time the other day to do a full uninstall/reinstall of Avast and things are better now.  However, I have left the Dropbox upload throttle at 10kb/sec, so I don't know if the Avast reinstall really did anything or not.
If possible, could you please try to see how it performs when you remove the limit? If it seems to be working okay, maybe a full un/re-install is what it takes. Thanks!
Title: Re: Avast Web Shield slowing down/blocking Dropbox uploads
Post by: Mark_43 on April 05, 2014, 08:11:22 AM
This issue has now returned on the latest update!
Title: Re: Avast Web Shield slowing down/blocking Dropbox uploads
Post by: gilbut on April 05, 2014, 08:29:30 AM
+1

The problem with Dropbox upload came back with the last update of Avast :(

Why Avast team can't solve that ?????
Title: Re: Avast Web Shield slowing down/blocking Dropbox uploads
Post by: maurograuso@gmail.com on April 05, 2014, 11:13:05 AM
The last time this bug came up Avast provided much more support. It's annoying that when there's such a serious bug regression, we get no feedback. Perhaps the fault is very hard to solve, or the support is just ignoring this thread?

Title: Re: Avast Web Shield slowing down/blocking Dropbox uploads
Post by: monark on April 05, 2014, 10:27:44 PM
I am also experiencing this issue.  It also is affecting my Google Drive uploads, but in a different way.

With Dropbox, I have the issue of it showing an insanely high upload rate and only 1 second remaining for the upload to complete (which it never does).  Then it completely kills my Internet.  When I delete the "uploaded" file from Dropbox, and kill the process, my Internet returns to normal.  I can then re-open Dropbox and as long as I am not uploading, it is fine.  Syncing downloads from other computers (work, tablets, etc...) seems to be working fine.  I just cannot upload from my home computer (which is running Avast). 

Google Drive will not upload files. I just get a message to view unsyncable file(s).  However, it does not seem to kill my Internet connection like Dropbox does.  The files will just not upload.

I disabled all Avast shields and both Dropbox and Google Drive uploaded normally with no effect on my Internet.  Turn them back on, and the problem resumes.  I have since read that the Web Shield is apparently the one causing the issues.  Here is what I am using:

Avast! 2014.9.0.2016
Dropbox 2.6.27
Windows 7 Ultimate

Hopefully an update/fix can address this issue soon.  I really like Avast over other antivirus programs that I have used in the past!
Title: Re: Avast Web Shield slowing down/blocking Dropbox uploads
Post by: ravensday on April 06, 2014, 08:00:57 AM
Is this really Web Shield I had pages hang lately but I fixed it by disabling Avast Online Security browser add on. Can any one else confirm? On IE I went to manage add-ons and disabled Avast Online Security now all my pages load just fine and Web Shield shows as active still inside of Avast.
Title: Re: Avast Web Shield slowing down/blocking Dropbox uploads
Post by: Mark_43 on April 06, 2014, 12:05:30 PM
When I disable web shield all works as expected.
Title: Re: Avast Web Shield slowing down/blocking Dropbox uploads
Post by: Lisandro on April 06, 2014, 08:24:57 PM
I'm not having a single issue with AIS and Dropbox... I'm using AIS on auto-decide mode.
Title: Re: Avast Web Shield slowing down/blocking Dropbox uploads
Post by: nhoeller on April 06, 2014, 10:35:25 PM
Google Drive will not upload files. I just get a message to view unsyncable file(s).  However, it does not seem to kill my Internet connection like Dropbox does.  The files will just not upload.

@monark, does Google Drive report any additional information that might help narrow down the problem?  Is there anything in the Windows Event Log? 
Title: Re: Avast Web Shield slowing down/blocking Dropbox uploads
Post by: Zai on April 07, 2014, 02:37:41 PM
Hey,

as others have mentioned, the bug has returned with the latest avast! update. Very disappointing, it had been working fine for me since January. :(

Avast! 2014.9.0.2016
Dropbox 2.6.2 and 2.6.27
Windows7 x64  Home Premium

Adding the Dropbox cache folder ( [path to Dropbox installation]/.dropbox.cache/* ) to the Antivirus exclusions does not seem to fix the problem either.

After installing the newest Dropbox version, uploading files worked for a few minutes ( uploaded 3 files, each about 1,5 MB ), after that, the uploading process stopped working again (just as it was in January).

I had been a happy avast! user for quite a while, but ever since avast! 2014, I've had a lot of bugs. Now, a bug that seemed fixed crops up again two months later. Starting to think that maybe I should start using something else :(
Title: Re: Avast Web Shield slowing down/blocking Dropbox uploads
Post by: Asyn on April 07, 2014, 02:42:56 PM
Add the two lines in your WebShield.ini

[General]
UseStreamFilter=0

Reboot afterwards.
Title: Re: Avast Web Shield slowing down/blocking Dropbox uploads
Post by: Zai on April 07, 2014, 03:21:49 PM
Asyn, please consider yourself my personal virtual hero for today!

Quote
Add the two lines in your WebShield.ini

[General]
UseStreamFilter=0

Reboot afterwards.

Works for me.

As this change to the .ini is about downgrading the WebShield from the new implementation (stream filter) to the previous one (proxy), as far as I understand, the Dropbox uploading bug appears to be related to the new stream filter WebShield implementation...!

Title: Re: Avast Web Shield slowing down/blocking Dropbox uploads
Post by: Asyn on April 07, 2014, 03:23:16 PM
You're welcome.
Title: Re: Avast Web Shield slowing down/blocking Dropbox uploads
Post by: monark on April 07, 2014, 07:42:54 PM
Google Drive will not upload files. I just get a message to view unsyncable file(s).  However, it does not seem to kill my Internet connection like Dropbox does.  The files will just not upload.

@monark, does Google Drive report any additional information that might help narrow down the problem?  Is there anything in the Windows Event Log?

Google Drive doesn't show any other information that I am aware of.  I am not at my home computer at the moment, so I will have to the event log tonight to see if it does show any information there.

I may also try the UseStreamFilter suggestion as well to see if that helps.
Title: Re: Avast Web Shield slowing down/blocking Dropbox uploads
Post by: Mark_43 on April 07, 2014, 09:57:44 PM
Where is the WebShield.ini file located?

I can not seem to find it!
Title: Re: Avast Web Shield slowing down/blocking Dropbox uploads
Post by: Asyn on April 07, 2014, 10:01:47 PM
Where is the WebShield.ini file located?
I can not seem to find it!

Depends on your OS, use the Windows search function to locate it.
Title: Re: Avast Web Shield slowing down/blocking Dropbox uploads
Post by: monark on April 07, 2014, 11:15:29 PM
Adding the UseStreamFilter=0 to my Webshield.ini file and rebooting has indeed seemed to fix both my Dropbox and Google Drive issues!  Thanks for the advice to do this.
Title: Re: Avast Web Shield slowing down/blocking Dropbox uploads
Post by: Asyn on April 07, 2014, 11:19:15 PM
You're welcome.
Title: Re: Avast Web Shield slowing down/blocking Dropbox uploads
Post by: Mark_43 on April 08, 2014, 08:26:09 AM
Where is the WebShield.ini file located?
I can not seem to find it!

Depends on your OS, use the Windows search function to locate it.
Windows 7 (Professional)

I have tried searching and it can not be located. Plus I have looked in AppData and the aVast program directory.
Title: Re: Avast Web Shield slowing down/blocking Dropbox uploads
Post by: Asyn on April 08, 2014, 08:36:40 AM
Windows 7 (Professional)
I have tried searching and it can not be located. Plus I have looked in AppData and the aVast program directory.

C:\ProgramData\AVAST Software\Avast\WebShield.ini
Title: Re: Avast Web Shield slowing down/blocking Dropbox uploads
Post by: Mark_43 on April 09, 2014, 08:25:13 AM
Windows 7 (Professional)
I have tried searching and it can not be located. Plus I have looked in AppData and the aVast program directory.

C:\ProgramData\AVAST Software\Avast\WebShield.ini
I forgot about that one! :(

Anyway it worked a treat in the end, so thank you! :)

I had an issue that Windows wouldn't let me save the modified file or over write the existing file, so I had to restart into Safe Mode and make the modification to the WebShield.ini file in safe mode and then restart.

Title: Re: Avast Web Shield slowing down/blocking Dropbox uploads
Post by: Asyn on April 09, 2014, 08:26:15 AM
Anyway it worked a treat in the end, so thank you! :)

You're welcome.
Title: Re: Avast Web Shield slowing down/blocking Dropbox uploads
Post by: Parabell on April 09, 2014, 11:02:13 AM
I have that problem again, but this time neither disabling Avast helps,
and this webshield.ini hack was still active from the last time.

At the moment I try to repair Avast.

Funny - as I was repairing it (and it was completely off), my uploads started
again, but now die again.

Has anybody an idea to help?

Title: Re: Avast Web Shield slowing down/blocking Dropbox uploads
Post by: Soukyuu on April 09, 2014, 12:51:58 PM
Ok, this is getting absurd.

First: setting program update to manual means I do NOT want it to pester me to update!
Second: why in God's name does it IGNORE cancelling the update process?
And third: how did you manage to f**k up the web filter after you fixed it in the previous update?!

P.S.: bugs are fine and dandy, but regressions is what makes people dump software and look for something else.
Title: Re: Avast Web Shield slowing down/blocking Dropbox uploads
Post by: Hemispasm on April 09, 2014, 10:31:42 PM
Hi guys again,

I can also confirm that the problem has reappeared. This is really sad that the problem came back, the point is to get new problems with updates, not to go back to the previous ones! :-)

I used the ini workaround just now and it seems to work for now. DO you know whether this temp fix will be overwritten if I update to the next version of avast? Should I just stick with this one for a while?
Title: Re: Avast Web Shield slowing down/blocking Dropbox uploads
Post by: Parabell on April 10, 2014, 02:40:05 PM
 In my Installation the hack from a few months ago remained
after Updates in the Webshield, but unfortunately did not seem
to work anymore, because I had that problems again.
Also deactivating Avast did not work anymore.

Yesterday after again several hours of trying I had to uninstall
Avast completely and reinstall it and made again the Webshield
hack into the Webshield.ini.

My ini was quite full before deinstallation (and repairing), with
lots of entries, after new istallation there was only one entry.

It seems that Avast does not clean up when upgrading.

All I can say, that after completely deinstalling, booting,
reeinstalling, hacking the .ini, booting again, it seems to
work again.

Also not only dropbox was affected, general web-uploads
did not work here either, two days were lost.


Liebes Avast-Team: ich habe wirklich keine Zeit und Nerven,
jedesmal mehrere Stunden Zeit in so eine Fehlersuche zu
versenken, und mehrere Tage mit vergeblichen Uploads zu
verbringen. Bitte testet Eure Software gründlicher, bevor ihr sie
an uns Versuchskaninchen rausschickt.
Das ist nun schon das zweite Mal, auch wenn ich diesmal nicht
mehrere Wochen mit Problemen zu kämpfen hatte, sondern
"nur" 2 Tage, weil ich diesmal gleich an Avast dachte.

Es ist weder die Aufgabe der User, sich mit der Fehlersuche und
deren Behandlung auseinandersetzen zu müssen, noch hat der
Durchschnittsmensch Zeit und Lust dafür! Ich bin sicher, ich bin
hier nicht die einzige Person, die ihre Computer und ihre Internet-
Verbindung benötigt, um damit Geld zu verdienen.

Wenn so ein Fehler auftritt, erwarte ich eigentlich innerhalb von
wenigen Stunden (!) ein Update, das diesen Fehler *automatisch*
behebt. Kein herumbasteln an .ini-Dateien, für das man auch
noch den Rechner austricksen muss, keine stundenlange Recherche
in diversen Foren, kein Heruminstallieren. Das ist eure Aufgabe,
nicht meine!

Wenn sich das nochmal wiederholt, werde ich mich wohl oder
übel nach einem anderen Virenscanner umsehen, obwohl ich
bereits seit gut 10 Jahren bei Avast bin und es auch immer
weiterempfohlen habe. Soetwas darf nicht passieren, erstrecht
nicht zweimal, und erstrecht nicht auf eine Art, wo sich auch noch
der Nutzer darum kümmern muss, wie er diese blöde ini-Datei
findet und ändern kann!

Nur zur Info: ich habe gestern alleine 58min mit der 1&1 Hotline
telefoniert, um herauszufinden, was los war und ob es an der
Leitung oder Fritzbox liegt, dass ich nichts uploaded kann.
Von der ganzen restlichen Zeit (mehrere Stunden!) Recherche,
Reparieren, Deinstallieren, Rauf- Runterfahren, etc. mal ganz zu
schweigen.

I am not amused!
Title: Re: Avast Web Shield slowing down/blocking Dropbox uploads
Post by: Dlee13 on April 15, 2014, 05:32:45 PM
I've also been having this problem for a while. The issue was only really affecting me when uploading to Flickr/500px but now that I've reinstalled Dropbox I have another program to add to the list. One strange thing I've found is, my PC and Laptop are both Windows 7 64 bit and neither work when using my net at home or at my girlfriends. Yet if I am to try upload at uni the issue doesn't seem to be present.
Title: Re: Avast Web Shield slowing down/blocking Dropbox uploads
Post by: Thumbsy on April 16, 2014, 08:40:53 PM
Asyn, your tip to disable the Stream Filter seems to work like a charm. Finally it seems possible for me to upload to the internet properly again.
Thank you!
Title: Re: Avast Web Shield slowing down/blocking Dropbox uploads
Post by: Asyn on April 17, 2014, 09:12:10 AM
You're welcome.
Title: Re: Avast Web Shield slowing down/blocking Dropbox uploads
Post by: YVESZAJ on April 17, 2014, 05:22:42 PM
Hello,

I had the same problem with Avast and Dropbox since avast v 2014.9.0.2016.

I did not patch the WebShield.ini file.

But today I just update Avast to the new version 2014.9.0.2018, and now it seems to work fine  :)

Title: Re: Avast Web Shield slowing down/blocking Dropbox uploads
Post by: CraigB on April 17, 2014, 05:27:56 PM
But today I just update Avast to the new version 2014.9.0.2018, and now its works fine  :)
I think you mean 2014.9.0.2017, 2018 is not released yet that can find ???
Title: Re: Avast Web Shield slowing down/blocking Dropbox uploads
Post by: YVESZAJ on April 17, 2014, 05:32:37 PM
But today I just update Avast to the new version 2014.9.0.2018, and now its works fine  :)
I think you mean 2014.9.0.2017, 2018 is not released yet that can find ???

No. I mean v 2014.9.0.2018 which is available from a few minutes.

http://forum.avast.com/index.php?topic=149104.0 (http://forum.avast.com/index.php?topic=149104.0)
Title: Re: Avast Web Shield slowing down/blocking Dropbox uploads
Post by: CraigB on April 17, 2014, 05:36:19 PM
But today I just update Avast to the new version 2014.9.0.2018, and now its works fine  :)
I think you mean 2014.9.0.2017, 2018 is not released yet that can find ???

No. I mean v 2014.9.0.2018 which is available from a few minutes.

http://forum.avast.com/index.php?topic=149104.0 (http://forum.avast.com/index.php?topic=149104.0)
Ah just released! Thanks :)
Title: Re: Avast Web Shield slowing down/blocking Dropbox uploads
Post by: xtra0581 on May 13, 2014, 09:30:05 PM
This new version does not fix the problem for me.

Windows 8.1, Dropbox 2.6.33, avast free 2014.9.0.2018

On my Windows 7 laptop the upload is ok.

Disabling web security solves the problem...