This is a problem that was introduced in an update a few months back and affects a lot of people that have purchased the Avast Internet Security so they can have access to an inclusive firewall.
In a nutshell the Avast firewall breaks 3rd party OpenVPN access (TAPv9 UDP/TCP) on Windows 10 (PPtP still works but that is not good enough). Recent posts from Avast support show that it was worked on and a fix should have been posted by the end of July 2016. Alas the Avast 12.2.2276 update is here and OpenVPN is still not working!! Note that by disabling the Avast firewall everything is fine (vanilla re-install).
I understand that the firewall works fine with Avast SecureLine VPN (I do not own it) which is great. What is not acceptable is that all other 3rd party OpenVPN clients are now in effect barred while we paid customers have to disable the firewall to be able to access securely (?!?!) the internet.
When will this be fixed for good??
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Tested on:
- MSI GE702PE ApachePro x64, Asus ZenBook UX305F x64, Dell Inspiron 1520 x32
- Windows 10 (WiFi single/double bands, no Ethernet)
- Latest TAP driver v9.21.2
- A number of VPN providers and their clients, such as Infinity, KeepSolid, Anonine etc
- Latest OpenVPN client v2.3.11