BleepingComputer.com: Piggy back attack from IP

This was my firewall log this morning, I am really worried about the "Piggy back attack from IP(Highlighted in red below)"

Should I be worried?

EDIT: Forgot to add, there are 2 PC's and 1 Ipod using this wireless everyday..

Is the attack done to the router or MY PC? Also, the other person is not very computer savvy, and does not know much about security.. can they compromise us both by using the same network?

FIREWALL LOG:

Aug/24/2011 07:28:21 00:26:4a:53:21:5b is blocked by firewall MAC filter[7 times]
Aug/24/2011 07:29:21 00:26:4a:53:21:5b is blocked by firewall MAC filter[5 times]
Aug/24/2011 07:29:57 00:26:4a:53:21:5b is blocked by firewall MAC filter[1 times]
Aug/24/2011 07:30:31 00:26:4a:53:21:5b is blocked by firewall MAC filter[8 times]
Aug/24/2011 07:31:16 00:26:4a:53:21:5b is blocked by firewall MAC filter[4 times]
Aug/24/2011 07:32:04 00:26:4a:53:21:5b is blocked by firewall MAC filter[1 times]
Aug/24/2011 07:32:38 00:26:4a:53:21:5b is blocked by firewall MAC filter[8 times]
Aug/24/2011 07:33:17 00:26:4a:53:21:5b is blocked by firewall MAC filter[5 times]
Aug/24/2011 07:34:12 00:26:4a:53:21:5b is blocked by firewall MAC filter[1 times]
Aug/24/2011 07:34:46 00:26:4a:53:21:5b is blocked by firewall MAC filter[7 times]
Aug/24/2011 07:35:21 00:26:4a:53:21:5b is blocked by firewall MAC filter[5 times]
Aug/24/2011 07:36:00 00:26:4a:53:21:5b is blocked by firewall MAC filter[1 times]
Aug/24/2011 07:36:36 00:26:4a:53:21:5b is blocked by firewall MAC filter[6 times]
Aug/24/2011 07:37:09 00:26:4a:53:21:5b is blocked by firewall MAC filter[5 times]
Aug/24/2011 07:38:05 00:26:4a:53:21:5b is blocked by firewall MAC filter[3 times]
Aug/24/2011 07:38:35 00:26:4a:53:21:5b is blocked by firewall MAC filter[5 times]
Aug/24/2011 07:39:09 00:26:4a:53:21:5b is blocked by firewall MAC filter[5 times]
Aug/24/2011 07:39:57 00:26:4a:53:21:5b is blocked by firewall MAC filter[4 times]
Aug/24/2011 07:40:34 00:26:4a:53:21:5b is blocked by firewall MAC filter[2 times]
Aug/24/2011 07:41:09 00:26:4a:53:21:5b is blocked by firewall MAC filter[7 times]
Aug/24/2011 07:42:05 00:26:4a:53:21:5b is blocked by firewall MAC filter[5 times]
Aug/24/2011 07:42:42 00:26:4a:53:21:5b is blocked by firewall MAC filter[2 times]
Aug/24/2011 07:43:16 00:26:4a:53:21:5b is blocked by firewall MAC filter[7 times]
Aug/24/2011 07:43:56 00:26:4a:53:21:5b is blocked by firewall MAC filter[5 times]
Aug/24/2011 07:44:50 00:26:4a:53:21:5b is blocked by firewall MAC filter[2 times]
Aug/24/2011 07:45:26 00:26:4a:53:21:5b is blocked by firewall MAC filter[8 times]
Aug/24/2011 07:46:00 00:26:4a:53:21:5b is blocked by firewall MAC filter[4 times]
Aug/24/2011 07:46:59 00:26:4a:53:21:5b is blocked by firewall MAC filter[2 times]
Aug/24/2011 07:47:35 00:26:4a:53:21:5b is blocked by firewall MAC filter[8 times]
Aug/24/2011 07:48:23 00:26:4a:53:21:5b is blocked by firewall MAC filter[5 times]
Aug/24/2011 07:48:57 00:26:4a:53:21:5b is blocked by firewall MAC filter[1 times]
Aug/24/2011 07:49:33 00:26:4a:53:21:5b is blocked by firewall MAC filter[7 times]
Aug/24/2011 07:50:07 00:26:4a:53:21:5b is blocked by firewall MAC filter[5 times]
Aug/24/2011 07:50:56 00:26:4a:53:21:5b is blocked by firewall MAC filter[2 times]
Aug/24/2011 07:51:33 00:26:4a:53:21:5b is blocked by firewall MAC filter[6 times]
Aug/24/2011 07:52:07 00:26:4a:53:21:5b is blocked by firewall MAC filter[5 times]
Aug/24/2011 07:52:57 00:26:4a:53:21:5b is blocked by firewall MAC filter[3 times]
Aug/24/2011 07:53:28 00:26:4a:53:21:5b is blocked by firewall MAC filter[4 times]
Aug/24/2011 07:54:02 00:26:4a:53:21:5b is blocked by firewall MAC filter[5 times]
Aug/24/2011 07:55:02 00:26:4a:53:21:5b is blocked by firewall MAC filter[5 times]
Aug/24/2011 07:55:32 00:26:4a:53:21:5b is blocked by firewall MAC filter[3 times]
Aug/24/2011 07:56:06 00:26:4a:53:21:5b is blocked by firewall MAC filter[6 times]
Aug/24/2011 07:56:56 00:26:4a:53:21:5b is blocked by firewall MAC filter[5 times]
Aug/24/2011 07:57:40 00:26:4a:53:21:5b is blocked by firewall MAC filter[2 times]
Aug/24/2011 07:58:13 00:26:4a:53:21:5b is blocked by firewall MAC filter[7 times]
Aug/24/2011 07:58:56 00:26:4a:53:21:5b is blocked by firewall MAC filter[5 times]
Aug/24/2011 07:59:48 00:26:4a:53:21:5b is blocked by firewall MAC filter[2 times]
Aug/24/2011 08:00:21 00:26:4a:53:21:5b is blocked by firewall MAC filter[8 times]
Aug/24/2011 08:01:03 00:26:4a:53:21:5b is blocked by firewall MAC filter[4 times]
Aug/24/2011 08:01:56 00:26:4a:53:21:5b is blocked by firewall MAC filter[2 times]
Aug/24/2011 08:02:31 00:26:4a:53:21:5b is blocked by firewall MAC filter[8 times]
Aug/24/2011 08:03:21 00:26:4a:53:21:5b is blocked by firewall MAC filter[5 times]
Aug/24/2011 08:03:57 00:26:4a:53:21:5b is blocked by firewall MAC filter[1 times]
Aug/24/2011 08:04:30 00:26:4a:53:21:5b is blocked by firewall MAC filter[7 times]
Aug/24/2011 08:05:03 00:26:4a:53:21:5b is blocked by firewall MAC filter[4 times]
Aug/24/2011 08:06:00 00:26:4a:53:21:5b is blocked by firewall MAC filter[3 times]
Aug/24/2011 08:06:30 00:26:4a:53:21:5b is blocked by firewall MAC filter[6 times]
Aug/24/2011 08:07:06 00:26:4a:53:21:5b is blocked by firewall MAC filter[5 times]
Aug/24/2011 08:07:56 00:26:4a:53:21:5b is blocked by firewall MAC filter[3 times]
Aug/24/2011 08:08:27 00:26:4a:53:21:5b is blocked by firewall MAC filter[4 times]
Aug/24/2011 08:09:00 00:26:4a:53:21:5b is blocked by firewall MAC filter[5 times]
Aug/24/2011 08:10:00 00:26:4a:53:21:5b is blocked by firewall MAC filter[5 times]
Aug/24/2011 08:10:31 00:26:4a:53:21:5b is blocked by firewall MAC filter[2 times]
Aug/24/2011 08:11:05 00:26:4a:53:21:5b is blocked by firewall MAC filter[7 times]
Aug/24/2011 08:12:01 00:26:4a:53:21:5b is blocked by firewall MAC filter[5 times]
Aug/24/2011 08:12:39 00:26:4a:53:21:5b is blocked by firewall MAC filter[2 times]
Aug/24/2011 08:13:13 00:26:4a:53:21:5b is blocked by firewall MAC filter[7 times]
Aug/24/2011 08:13:56 00:26:4a:53:21:5b is blocked by firewall MAC filter[5 times]
Aug/24/2011 08:14:48 00:26:4a:53:21:5b is blocked by firewall MAC filter[2 times]
Aug/24/2011 08:15:19 00:26:4a:53:21:5b is blocked by firewall MAC filter[7 times]
Aug/24/2011 08:15:49 00:26:4a:53:21:5b is blocked by firewall MAC filter[4 times]
Aug/24/2011 08:16:58 00:26:4a:53:21:5b is blocked by firewall MAC filter[3 times]
Aug/24/2011 08:17:29 Piggy back attack from IP 92.151.90.87 port 55130 to IP 99.164.84.6
Aug/24/2011 08:17:33 00:26:4a:53:21:5b is blocked by firewall MAC filter[8 times]
Aug/24/2011 08:18:16 00:26:4a:53:21:5b is blocked by firewall MAC filter[5 times]
Aug/24/2011 08:19:01 00:26:4a:53:21:5b is blocked by firewall MAC filter[1 times]
Aug/24/2011 08:19:31 00:26:4a:53:21:5b is blocked by firewall MAC filter[7 times]
Aug/24/2011 08:20:04 00:26:4a:53:21:5b is blocked by firewall MAC filter[5 times]
Aug/24/2011 08:20:57 00:26:4a:53:21:5b is blocked by firewall MAC filter[2 times]
Aug/24/2011 08:21:29 00:26:4a:53:21:5b is blocked by firewall MAC filter[6 times]
Aug/24/2011 08:22:03 00:26:4a:53:21:5b is blocked by firewall MAC filter[5 times]
Aug/24/2011 08:23:00 00:26:4a:53:21:5b is blocked by firewall MAC filter[3 times]
Aug/24/2011 08:23:38 00:26:4a:53:21:5b is blocked by firewall MAC filter[6 times]
Aug/24/2011 08:24:12 00:26:4a:53:21:5b is blocked by firewall MAC filter[5 times]
Aug/24/2011 08:25:01 00:26:4a:53:21:5b is blocked by firewall MAC filter[3 times]
Aug/24/2011 08:25:33 00:26:4a:53:21:5b is blocked by firewall MAC filter[4 times]
Aug/24/2011 08:26:03 00:26:4a:53:21:5b is blocked by firewall MAC filter[5 times]

This post has been edited by hiki: 24 August 2011 - 08:36 AM