My recommendation to you is to d/l windump and libpcap which is it's dependency. Just google
for windump and both of the abv mentioned are there. Once installed take a look at the packets flying across and post a snippet of what it is your talking about. It is unlikely that someone has access to your computer now that your router is up. ZA has some exploits out
against it though. Anyhoo install what I said and post some of the traffic.