Fremmede IP-adresser juleaften!

Jeg sad lige tilfældigt og kiggede i min mors router statistik og her fandt jeg dette:

[LAN access from remote] from 94.41.114.93:63071 to 192.168.1.2:17456, Thursday, December 24,2009 23:29:00
[LAN access from remote] from 8.15.172.**:60604 to 192.168.1.2:17456, Thursday, December 24,2009 23:22:21
[LAN access from remote] from 216.41.253.***:42517 to 192.168.1.2:17456, Thursday, December 24,2009 23:18:30
[LAN access from remote] from 94.23.3.**:65065 to 192.168.1.2:17456, Thursday, December 24,2009 23:18:06
[LAN access from remote] from 76.166.144.***:53140 to 192.168.1.2:17456, Thursday, December 24,2009 23:09:33
[LAN access from remote] from 76.85.177.***:57894 to 192.168.1.2:17456, Thursday, December 24,2009 23:08:55

Jeg har sat stjerner ind så jeg ikke afslører nogle ip adresser, men de er fra Rusland, Frankrig, USA og et par andre steder.

Er det noget jeg skal bekymre mig om?
Desuden finder jeg også dette:

[DoS Attack: ACK Scan] from source: 114.137.156.***, port 2028, Thursday, December 10,2009 13:47:14

Hvordan sikrer jeg mig at min sikkerhed er i orden?