For the last week or so my router logs have stated "[DOS attack: ACK Scan] attack packets in last 20 sec from ip [207.126.64.181]". The ip address is always the same and the attacks happen about every 30 seconds or so. I have Googled the ip and the best I can tell it is from "4chan". I have talked with Charter but they were not sure what to do at this point, they new that AT&T had some issues with "4chan" but currently they were not having any problems. I asked to have my ip changed so they told me to shut all computers, router & modem down for atleast 1 minute then reboot starting withe the modem and working my way up the line. This did not help. My routers fire wall seems to be blocking the attacks from our computers so far.

1. Has anyone else had this problem?
2. Is there any way to fix or avoid these attacks?
3. If this continues will it cause problems?
4. How did this server/person get my ip? Would someone have gone to a site they should not have?

Here are a few of lines from last night:

[DOS attack: ACK Scan] attack packets in last 20 sec from ip [207.126.64.181], Thursday, Jul 30,2009 01:43:00
[DOS attack: ACK Scan] attack packets in last 20 sec from ip [207.126.64.181], Thursday, Jul 30,2009 01:42:35
[DOS attack: ACK Scan] attack packets in last 20 sec from ip [207.126.64.181], Thursday, Jul 30,2009 01:42:10
[DOS attack: ACK Scan] attack packets in last 20 sec from ip [207.126.64.181], Thursday, Jul 30,2009 01:41:45
[DOS attack: ACK Scan] attack packets in last 20 sec from ip [207.126.64.181], Thursday, Jul 30,2009 01:41:20
[DOS attack: ACK Scan] attack packets in last 20 sec from ip [207.126.64.181], Thursday, Jul 30,2009 01:40:55
[DOS attack: ACK Scan] attack packets in last 20 sec from ip [207.126.64.181], Thursday, Jul 30,2009 01:40:30
[DOS attack: ACK Scan] attack packets in last 20 sec from ip [207.126.64.181], Thursday, Jul 30,2009 01:40:05
[DOS attack: ACK Scan] attack packets in last 20 sec from ip [207.126.64.181], Thursday, Jul 30,2009 01:39:40


Any help will be greatly appreciated!
Thank you, and have a great day!
Roundman