Dear All,
I see some strange behaviour of avast free antivirus 2015 and 2016.
There is a non transparent squid proxy server in my LAN.
My PCs (win7, win8, no desktop firewall) are well configured to use is for browsing etc (automatic detection via wpad)
As I saw no "automatic proxy feature" to configure in my avast installation, I configured the proxy settings manually.
My MANUAL updates work fine.
But AUTOMATIC updates do not work, after several days I still see the version I updated manually.
When I click "update manally", I get updates to the latest version.
I analyzed this automatic update behaviour on two of my PCs with wireshark.
This is what I saw:
- dns queries and answers for avast domain names
- tcp syn packets directly to Avast Internet IPs
- NO packets to my proxy server.
So obviously the avast automatic update directly tries to connect to the update servers , ignoring the proxy settings.
I saw the same behaviour with the register feature in the avast GUI --> no connecton possible.
So I would like to ask you two questions:
1) is there anyone using avast free antivirus 2015/2016 behind a proxy without the problems i described?
2) does anyone of you have an idea how to solve or workaround the behaviour I saw?
Thanks a lot!
Sepp