Just like title says, i think there's someone taking ALOT of my bandwith, but are somehow invisible to me, my wireless network only has mac acess control to keep down on passwords, and i'm only allowing my brothers computer through it's MAC adress list, but i think there's someone else connected, but there's nothing ever else on the DHCP list.

Am i going crazy?

Or is it this:

Firewall log:
Mon Jul 3 00:34:36 2006 1 Blocked by DoS protection 66.103.134.130
Mon Jul 3 00:34:36 2006 1 Blocked by DoS protection 66.103.134.130
Mon Jul 3 00:34:36 2006 1 Blocked by DoS protection 66.103.134.130
Mon Jul 3 00:34:36 2006 1 Blocked by DoS protection 66.103.134.130
Mon Jul 3 00:34:37 2006 1 Blocked by DoS protection 73.172.12.1
Mon Jul 3 00:34:38 2006 1 Blocked by DoS protection 71.39.168.75
Mon Jul 3 00:34:39 2006 1 Blocked by DoS protection 73.172.12.1
Mon Jul 3 00:34:39 2006 1 Blocked by DoS protection 200.86.149.22
Mon Jul 3 00:34:40 2006 1 Blocked by DoS protection 70.220.243.15
Mon Jul 3 00:34:43 2006 1 Blocked by DoS protection 73.172.12.1
Mon Jul 3 00:34:51 2006 1 Blocked by DoS protection 73.172.12.1
Mon Jul 3 00:35:07 2006 1 Blocked by DoS protection 73.172.12.1
Mon Jul 3 00:35:15 2006 1 Blocked by DoS protection 73.172.12.1
Mon Jul 3 00:35:15 2006 1 Blocked by DoS protection 73.172.12.1
Mon Jul 3 00:35:30 2006 1 Blocked by DoS protection 65.87.8.40
Mon Jul 3 00:35:39 2006 1 Blocked by DoS protection 73.172.12.1
Mon Jul 3 00:35:42 2006 1 Blocked by DoS protection 218.27.16.145
Mon Jul 3 00:35:42 2006 1 Blocked by DoS protection 218.27.16.145
Mon Jul 3 00:36:18 2006 1 Blocked by DoS protection 70.241.99.93
Mon Jul 3 00:36:52 2006 1 Blocked by DoS protection 206.219.65.240
Mon Jul 3 00:36:53 2006 1 Blocked by DoS protection 73.172.12.1
Mon Jul 3 00:36:55 2006 1 Blocked by DoS protection 73.172.12.1
Mon Jul 3 00:36:59 2006 1 Blocked by DoS protection 73.172.12.1
Mon Jul 3 00:37:07 2006 1 Blocked by DoS protection 73.172.12.1
Mon Jul 3 00:37:23 2006 1 Blocked by DoS protection 73.172.12.1
Mon Jul 3 00:37:49 2006 1 Blocked by DoS protection 67.71.58.69
Mon Jul 3 00:37:51 2006 1 Blocked by DoS protection 66.220.3.206
Mon Jul 3 00:37:55 2006 1 Blocked by DoS protection 73.172.12.1
Mon Jul 3 00:37:55 2006 1 Blocked by DoS protection 66.220.3.206
Mon Jul 3 00:37:56 2006 1 Blocked by DoS protection 73.172.12.1
Mon Jul 3 00:37:56 2006 1 Blocked by DoS protection 73.172.12.1
Mon Jul 3 00:38:19 2006 1 Blocked by DoS protection 65.88.71.104

???????