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AdguardTeam
AdGuard blocks previews on Avito
@maxikuzmin commented on Thu Jun 02 2022
If AdGuard is enabled, not all product photos (previews) are displayed when you scroll through the ads in the Avito app. Only the original filters are enabled, there are no additional filters. When AdGuard is disabled, all pictures (previews) are displayed Also sometimes don't displayed pictures in ad
Android 10 Don't reproduce on IOS
@zloyden commented on Thu Jun 02 2022
@maxikuzmin I can't reproduce it on my end with or without our DNS. Please provide steps to reproduce or show which request needs to be unblocked.
@maxikuzmin commented on Fri Jun 03 2022
@zloyden connect to a mobile network
@zloyden commented on Fri Jun 03 2022
It does not matter whether Wi Fi or mobile network is used. I do not see that their request is blocked.
@maxikuzmin commented on Fri Jun 03 2022
I tried disabling all filters and DNS, the problem remains
The issue has stopped reproduce, closed for now. If anyone else has this, feel free to provide logs from the app.
This issue requires thorough analysis. We will conduct it before long and will return with the results.
Due to the logcat, avito is trying to use an IPv6 address in IPv4-only networks.
DNS filtering was turned off for all users who sent logs. Enabling DNS filtering or IPv6 traffic bypass fixes the issue.
I can't imagine how they got IPv6 addresses and it looks like a bug of some HTTP client they're using.