Nope its not a virus.
I was curious; as yesterday I had my firewall at full protection (stealth mode) Overloard joined my server; I minimized to look for something; I maximized again and I got a short access violation;
on another server he told me he timed out; I am not accusing anyone here.
Anyway (a bit off topic) I turned off some functions in my firewall so I can finally host servers and they dont ping all the time.