Can't pass GRC leak test in Other Emsisoft products Posted September 29, 2012 · Report reply I spoke to Andrey about this, and he mentioned that KAV has a network filter driver (I think it acts as a sort of proxy) that prevents third-party firewalls from filtering network traffic, which is why OA did not warn you about the leaktest trying to access the network. Thanks for that. It sounds reasonable. If true. that's rather disconcerting since it appears to mean that with KAV (and not KIS) I will have little or no outbound firewall protection. I have found a short thread in the Kaspersky forums with posts from two users who discovered the same problem using Windows firewall. When any one (or more) of the protection components for email, IM, or Web shield is (are) enabled KAV intercepts outgoing Net traffic. After satisfying itself that it's OK it passes it through to the firewall - *but* under its own program name (avp.exe). So any non-Kaspersky firewall will never see the name of the actual program that's accessing the Net and can't control it. The firewall only sees that KAV wants to send something to the Net and of course that's allowed as KAV is a Trusted (or excluded) program. Also, there remains an apparent inconsistency. As i mentioned in my earlier pots, OA *does* (has) popped up a warning about a program trying to access the Internet *with* KAV 2012 protection enabled. For example, when clicking on a link to check for updates. e.g. - Adobe Reader which uses another process (AdobeARM.exe) to access the Internet. With *no* Firewall rule set for AdobeARM.exe, OA will pop up the dialog asking if I want to Allow or Block this Internet access. It appears that in some cases a particular program may not get filtered by KAV in the way described above. In any event, it's apparently not an OA problem so thanks for the feedback. If Kaspersky is unresponsive, unwilling or unable to change this behavior. I'll have to consider my options. Use KIS rather than KAV. or try another anti-virus program and see which one(s) respect the role of 3rd-party firewalls and lets them do their job.