text: It has to do with being on the internet, pure and simple.  There are viruses and bots on the net that are continuously trying to find unprotected systems to spread malware.  Using a firewall is your defense to this activity.  Keep your firewall up to date as well as your anti-virus and anti-spyware software and don't worry about it.\n\nAnyone trying to hijack your wireless connection will NOT show up in your firewall logs but in the wireless router or access point logs.  If you've locked your wireless down there's little to worry from that.