Logs de mon routeur étrange

Bonjour,

J'aimerais comprendre qu'est que cela signifie
Cela c'est durant la nuit, quand tous nos ordinateur étais éteindu et que nous dormions.

Merci pour vos conseils et informations

[INFO] Wed Jun 03 05:04:44 2009 Starting WAN Services
[INFO] Wed Jun 03 05:04:44 2009 Rate estimation completed. Upstream speed is 912 kbps
[INFO] Wed Jun 03 05:04:14 2009 Estimating speed of WAN interface
[INFO] Wed Jun 03 05:04:14 2009 WAN interface is up. Connection to Internet established with IP Address xx.xx.xx.xx (Mon IP) and default gateway xx.xx.xx.xx (Le gateway de mon IP)
[INFO] Wed Jun 03 05:04:14 2009 Obtained IP Address using DHCP. IP address is xx.xx.xx.xx (Mon IP)
[INFO] Wed Jun 03 05:04:12 2009 Stopping WAN Services
[INFO] Wed Jun 03 05:04:12 2009 WAN interface is down
[INFO] Wed Jun 03 05:04:12 2009 Lost lease on IP Address
[INFO] Wed Jun 03 04:47:55 2009 Starting WAN Services
[INFO] Wed Jun 03 04:47:55 2009 Rate estimation aborted as measurements failed to converge
[INFO] Wed Jun 03 04:47:22 2009 Estimating speed of WAN interface
[INFO] Wed Jun 03 04:47:22 2009 WAN interface is up. Connection to Internet established with IP Address 192.168.100.2 and default gateway 0.0.0.0
[INFO] Wed Jun 03 04:47:22 2009 Obtained IP Address using DHCP. IP address is 192.168.100.2
[INFO] Wed Jun 03 04:47:20 2009 Bringing up WAN using DHCP
[INFO] Wed Jun 03 04:47:20 2009 WAN interface cable has been connected
[INFO] Wed Jun 03 04:47:09 2009 Stopping WAN Services
[INFO] Wed Jun 03 04:47:09 2009 WAN interface is down
[INFO] Wed Jun 03 04:47:09 2009 WAN interface cable has been disconnected

P.S : J'ai déja eu des problème d'intrusion sur mon réseau.