I have a Belkin Wireless G 2.4Ghz-802.11g router. I have set up security to allow WPA/WPA2 clients to connect, authentication type is Password(PSK). I have a reasonably strong password guest password and an even stronger Admin password , but somehow there is an unknown client named MyBook that keeps connecting.
DHCP is enabled. The router's address is 192.168.2.1. My two computers get assigned the IPs of 192.168.2.2 and 192.168.2.3. When I checked my DHCP client list, the mysterious "MyBook" client was assigned an IP of 192.168.2.18. When I restart my router, it disappears, but then reappears in about 24 hours, using exactly the same IP address 192.168.2.18.
My thoughts: Maybe this is just some kind of automatic system client, since if it was an actual client, my router should have assigned the next available IP which is 192.168.2.4. But then when I turn on MAC Addressing Filtering to allow only my computers to connect, this mysterious MyBook no longer appears in my DHCP client list.
My questions: Is this MyBook a person or some kind of automatic client? I find it hard to believe it's a person, since my passwords are quite strong and it would difficult to "crack" them so fast. Should I be concerned about this? If so, what can I do to prevent this from happening?
Below is my entire router activity log since the last restart. The lines where MyBook (192.168.2.18) is concerned are bolded. Thank you so much for your time.
05/06/2006 16:03:11 192.168.2.3 login success
05/06/2006 13:24:52 NTP Date/Time updated.
05/06/2006 12:22:40 DHCP Client: Receive Ack from 192.168.1.1, 'Lease time'=36000
05/06/2006 12:22:40 DHCP Client: Send Request, Request IP=192.168.1.11
05/06/2006 07:24:50 NTP Date/Time updated.
05/06/2006 07:22:39 DHCP Client: Receive Ack from 192.168.1.1, 'Lease time'=36000
05/06/2006 07:22:39 DHCP Client: Send Request, Request IP=192.168.1.11
05/06/2006 02:22:39 DHCP Client: Receive Ack from 192.168.1.1, 'Lease time'=36000
05/06/2006 02:22:39 DHCP Client: Send Request, Request IP=192.168.1.11
05/06/2006 01:24:49 NTP Date/Time updated.
05/05/2006 22:30:51 sending ACK to 192.168.2.2
05/05/2006 21:22:38 DHCP Client: Receive Ack from 192.168.1.1, 'Lease time'=36000
05/05/2006 21:22:38 DHCP Client: Send Request, Request IP=192.168.1.11
05/05/2006 19:24:48 NTP Date/Time updated.
05/04/2006 05:33:06 sending ACK to 192.168.2.3
05/04/2006 05:33:06 sending OFFER to 192.168.2.3
05/04/2006 03:14:05 DHCP Client: Receive Ack from 192.168.1.1, 'Lease time'=36000
05/04/2006 03:14:05 DHCP Client: Send Request, Request IP=192.168.1.11
05/04/2006 01:41:54 sending ACK to 192.168.2.18
05/04/2006 01:41:54 sending OFFER to 192.168.2.18
05/04/2006 01:40:10 sending ACK to 192.168.2.18
05/04/2006 01:00:52 sending ACK to 192.168.2.18
05/04/2006 01:00:45 sending ACK to 192.168.2.18
05/04/2006 00:35:57 User from 192.168.2.3 timed out
05/04/2006 00:30:59 sending ACK to 192.168.2.18
05/04/2006 00:30:48 sending ACK to 192.168.2.18
05/04/2006 00:30:12 sending ACK to 192.168.2.18
05/04/2006 00:30:00 sending ACK to 192.168.2.18
05/04/2006 00:15:46 DHCP Client: Receive Ack from 192.168.1.1, 'Lease time'=36000
05/04/2006 00:15:46 DHCP Client: Send Request, Request IP=192.168.1.11
05/04/2006 00:15:46 DHCP Client: Receive Offer from 192.168.1.1
05/04/2006 00:15:45 DHCP Client: Send Discover
05/05/2006 13:18:45 192.168.2.3 login success
05/05/2006 12:16:15 NTP Date/Time updated.
05/05/2006 11:22:04 DHCP Client: Receive Ack from 192.168.1.1, 'Lease time'=36000
05/05/2006 11:22:04 DHCP Client: Send Request, Request IP=192.168.1.11
05/05/2006 06:22:04 DHCP Client: Receive Ack from 192.168.1.1, 'Lease time'=36000
05/05/2006 06:22:04 DHCP Client: Send Request, Request IP=192.168.1.11
05/05/2006 06:16:14 NTP Date/Time updated.
05/05/2006 02:05:38 sending ACK to 192.168.2.2
05/05/2006 01:22:02 DHCP Client: Receive Ack from 192.168.1.1, 'Lease time'=36000
05/05/2006 01:22:02 DHCP Client: Send Request, Request IP=192.168.1.11
05/05/2006 00:16:12 NTP Date/Time updated.
05/04/2006 22:20:40 sending ACK to 192.168.2.2
05/04/2006 22:20:40 sending OFFER to 192.168.2.2
05/04/2006 21:50:52 **TCP FIN Scan** 217.164.151.48, 11747->> 192.168.2.3, 4942 (from WAN Inbound)
05/04/2006 21:50:52 **TCP FIN Scan** 83.253.148.168, 40953->> 192.168.2.3, 4404 (from WAN Inbound)
05/04/2006 21:50:52 **TCP FIN Scan** 24.93.196.222, 12419->> 192.168.2.3, 4406 (from WAN Inbound)
05/04/2006 21:50:52 **TCP FIN Scan** 82.46.130.82, 16054->> 192.168.2.3, 4391 (from WAN Inbound)
05/04/2006 20:22:00 DHCP Client: Receive Ack from 192.168.1.1, 'Lease time'=36000
05/04/2006 20:22:00 DHCP Client: Send Request, Request IP=192.168.1.11
05/04/2006 18:16:10 NTP Date/Time updated.
05/04/2006 15:21:59 DHCP Client: Receive Ack from 192.168.1.1, 'Lease time'=36000
05/04/2006 15:21:59 DHCP Client: Send Request, Request IP=192.168.1.11
05/04/2006 12:16:09 NTP Date/Time updated.
05/04/2006 11:56:49 User from 192.168.2.3 timed out
05/04/2006 11:36:39 192.168.2.3 login success
05/04/2006 11:36:26 User from 192.168.2.3 timed out
05/04/2006 11:32:15 sending ACK to 192.168.2.2
05/04/2006 11:32:15 sending OFFER to 192.168.2.2
05/04/2006 10:46:41 sending ACK to 192.168.2.3
05/04/2006 10:46:41 sending OFFER to 192.168.2.3
05/04/2006 10:21:57 DHCP Client: Receive Ack from 192.168.1.1, 'Lease time'=36000
05/04/2006 10:21:57 DHCP Client: Send Request, Request IP=192.168.1.11
05/04/2006 06:16:07 NTP Date/Time updated.
04/25/2006 06:24:57 DHCP Client: Receive Ack from 192.168.1.1, 'Lease time'=36000
04/25/2006 06:24:57 DHCP Client: Send Request, Request IP=192.168.1.11
04/25/2006 04:03:12 192.168.2.3 login success
04/25/2006 03:31:41 **SYN Flood to Host** 192.168.2.3, 3340->> 206.251.251.70, 80 (from WAN Outbound)
04/25/2006 01:52:44 User from 192.168.2.3 timed out
04/25/2006 01:51:01 **SYN Flood to Host** 192.168.2.3, 2450->> 216.98.48.7, 80 (from WAN Outbound)
04/25/2006 01:24:57 DHCP Client: Receive Ack from 192.168.1.1, 'Lease time'=36000
04/25/2006 01:24:57 DHCP Client: Send Request, Request IP=192.168.1.11
04/25/2006 01:20:03 sending ACK to 192.168.2.2
04/25/2006 01:20:03 sending OFFER to 192.168.2.2
04/25/2006 01:18:38 DHCP Client: Receive Ack from 192.168.1.1, 'Lease time'=36000
04/25/2006 01:18:38 DHCP Client: Send Request, Request IP=192.168.1.11
04/25/2006 01:18:38 DHCP Client: Receive Offer from 192.168.1.1
04/25/2006 01:18:37 DHCP Client: Send Discover
04/25/2006 01:20:03 192.168.2.3 login success
04/25/2006 01:19:56 192.168.2.3 logout
04/25/2006 01:19:34 sending ACK to 192.168.2.3
04/25/2006 01:19:34 sending OFFER to 192.168.2.3
04/25/2006 01:19:28 **Smurf** 169.254.255.255->> 169.254.239.189, Type:3, Code:3 (from WAN Outbound)
04/25/2006 01:19:26 sending OFFER to 192.168.2.3
04/25/2006 01:19:26 **Smurf** 169.254.255.255->> 169.254.239.189, Type:3, Code:3 (from WAN Outbound)
04/25/2006 01:19:24 **Smurf** 169.254.255.255->> 169.254.239.189, Type:3, Code:3 (from WAN Outbound)
04/25/2006 01:19:23 **Smurf** 169.254.255.255->> 169.254.239.189, Type:3, Code:3 (from WAN Outbound)
04/25/2006 01:19:21 **Smurf** 169.254.255.255->> 169.254.239.189, Type:3, Code:3 (from WAN Outbound)
04/25/2006 01:19:20 **Smurf** 169.254.255.255->> 169.254.239.189, Type:3, Code:3 (from WAN Outbound)
04/25/2006 01:19:18 **Smurf** 169.254.255.255->> 169.254.239.189, Type:3, Code:3 (from WAN Outbound)
04/25/2006 01:19:18 sending OFFER to 192.168.2.3
04/25/2006 01:19:17 **Smurf** 169.254.255.255->> 169.254.239.189, Type:3, Code:3 (from WAN Outbound)
04/25/2006 01:19:15 **Smurf** 169.254.255.255->> 169.254.239.189, Type:3, Code:3 (from WAN Outbound)
04/25/2006 01:19:14 **Smurf** 169.254.255.255->> 169.254.239.189, Type:3, Code:3 (from WAN Outbound)
04/25/2006 01:19:13 sending OFFER to 192.168.2.3
04/25/2006 01:19:12 **Smurf** 169.254.255.255->> 169.254.239.189, Type:3, Code:3 (from WAN Outbound)
04/25/2006 01:19:11 **Smurf** 169.254.255.255->> 169.254.239.189, Type:3, Code:3 (from WAN Outbound)
04/25/2006 01:18:53 sending ACK to 192.168.2.3
04/25/2006 01:18:44 sending ACK to 192.168.2.3
04/25/2006 01:18:41 sending ACK to 192.168.2.3
04/25/2006 01:18:38 DHCP Client: Receive Ack from 192.168.1.1, 'Lease time'=36000
04/25/2006 01:18:38 DHCP Client: Send Request, Request IP=192.168.1.11
04/25/2006 01:18:38 DHCP Client: Receive Offer from 192.168.1.1
04/25/2006 01:18:37 DHCP Client: Send Discover
04/25/2006 01:18:38 DHCP Client: Receive Ack from 192.168.1.1, 'Lease time'=36000
04/25/2006 01:18:38 DHCP Client: Send Request, Request IP=192.168.1.11
04/25/2006 01:18:38 DHCP Client: Receive Offer from 192.168.1.1
04/25/2006 01:18:37 DHCP Client: Send Discover
04/25/2006 01:19:58 sending ACK to 192.168.2.2
04/25/2006 01:19:58 sending OFFER to 192.168.2.2
04/25/2006 01:18:38 DHCP Client: Receive Ack from 192.168.1.1, 'Lease time'=36000
04/25/2006 01:18:38 DHCP Client: Send Request, Request IP=192.168.1.11
04/25/2006 01:18:38 DHCP Client: Receive Offer from 192.168.1.1
04/25/2006 01:18:37 DHCP Client: Send Discover
04/25/2006 01:18:38 DHCP Client: Receive Ack from 192.168.1.1, 'Lease time'=36000
04/25/2006 01:18:38 DHCP Client: Send Request, Request IP=192.168.1.11
04/25/2006 01:18:38 DHCP Client: Receive Offer from 192.168.1.1
04/25/2006 01:18:37 DHCP Client: Send Discover
04/25/2006 01:18:38 DHCP Client: Receive Ack from 192.168.1.1, 'Lease time'=36000
04/25/2006 01:18:38 DHCP Client: Send Request, Request IP=192.168.1.11
04/25/2006 01:18:38 DHCP Client: Receive Offer from 192.168.1.1
04/25/2006 01:18:37 DHCP Client: Send Discover
04/25/2006 01:18:38 DHCP Client: Receive Ack from 192.168.1.1, 'Lease time'=36000
04/25/2006 01:18:38 DHCP Client: Send Request, Request IP=192.168.1.11
04/25/2006 01:18:38 DHCP Client: Receive Offer from 192.168.1.1
04/25/2006 01:18:37 DHCP Client: Send Discover
04/25/2006 01:18:38 DHCP Client: Receive Ack from 192.168.1.1, 'Lease time'=36000
04/25/2006 01:18:38 DHCP Client: Send Request, Request IP=192.168.1.11
04/25/2006 01:18:38 DHCP Client: Receive Offer from 192.168.1.1
04/25/2006 01:18:37 DHCP Client: Send Discover
05/03/2006 23:45:34 192.168.2.3 login success
05/03/2006 21:18:50 sending ACK to 192.168.2.2
05/03/2006 21:18:50 sending OFFER to 192.168.2.2
05/03/2006 19:19:07 NTP Date/Time updated.
05/03/2006 19:18:36 DHCP Client: Receive Ack from 192.168.1.1, 'Lease time'=36000
05/03/2006 19:18:36 DHCP Client: Send Request, Request IP=192.168.1.11
05/03/2006 14:18:36 DHCP Client: Receive Ack from 192.168.1.1, 'Lease time'=36000
05/03/2006 14:18:36 DHCP Client: Send Request, Request IP=192.168.1.11
05/03/2006 13:19:06 NTP Date/Time updated.
05/03/2006 09:18:34 DHCP Client: Receive Ack from 192.168.1.1, 'Lease time'=36000
05/03/2006 09:18:34 DHCP Client: Send Request, Request IP=192.168.1.11
05/03/2006 07:19:04 NTP Date/Time updated.
05/03/2006 04:18:33 DHCP Client: Receive Ack from 192.168.1.1, 'Lease time'=36000
05/03/2006 04:18:33 DHCP Client: Send Request, Request IP=192.168.1.11
05/03/2006 01:19:03 NTP Date/Time updated.
05/03/2006 00:56:44 **SYN Flood to Host** 192.168.2.3, 4303->> 64.20.44.77, 80 (from WAN Outbound)
05/02/2006 23:18:31 DHCP Client: Receive Ack from 192.168.1.1, 'Lease time'=36000
05/02/2006 23:18:31 DHCP Client: Send Request, Request IP=192.168.1.11
05/02/2006 19:19:01 NTP Date/Time updated.
05/02/2006 18:18:30 DHCP Client: Receive Ack from 192.168.1.1, 'Lease time'=36000
05/02/2006 18:18:30 DHCP Client: Send Request, Request IP=192.168.1.11
05/02/2006 15:12:39 sending ACK to 192.168.2.3
05/02/2006 15:05:12 sending ACK to 192.168.2.3
05/02/2006 13:19:00 NTP Date/Time updated.
05/02/2006 13:18:29 DHCP Client: Receive Ack from 192.168.1.1, 'Lease time'=36000
05/02/2006 13:18:29 DHCP Client: Send Request, Request IP=192.168.1.11
05/02/2006 12:08:13 sending ACK to 192.168.2.2
05/02/2006 12:08:13 sending OFFER to 192.168.2.2
05/02/2006 10:59:53 sending ACK to 192.168.2.3
Edited by Waterchan, 06 May 2006 - 06:39 PM.