re: Poker & Invader attacks during online-poker...?!
Trust me. The likelihood of you being hacked from a Russian server through your poker client is about 0.0000001%. It is remotely possible that you've been infected with something that targets poker clients when they're open, possibly to try and hijack your account or watch your tables, and is communicating to a remote server. Mind you, it would theoretically be possible, but I've not heard of it happening. But there is no way that a remote server can attack you through your poker client, at least not any of the big rooms like Stars or Tilt. They establish encrypted channels that are secured by certificate or PKI, and do not accept any connections that do not come from their servers. Perhaps remote servers are constantly probing the ports your poker clients use, but you don't see them when the clients aren't open and listening -- assuming they even open ports for listening (I haven't I run a packet analyzer yet when a poker client is open to see if it actually listens -- most network clients don't listen, rather they initiate connections to a server who is listening).
Virtually all computers on the internet are constantly being probed by literally millions of botnets and infected machines. I run a self-built Linux
gateway/firewall, and sometimes just for kicks I'll tail the firewall log and watch connection attempts from all over the world stream by constantly. It's a rough world out there in the tubes, which is why you should always keep your security software up to date and run multiple layers of firewalls when possible (like a NAT router + a software firewall).