森下 様・新城 様 リプライありがとうございます。

なんらかのアタックであるのは予測はつきますが、発見・報告されているものなのかが不明です。

> xx.ap.plala.or.jp - - [21/Jul/2004:11:04:00 +0900] "\xa0 \"\x1e" 400 - "-" "-"
> xx.ap.plala.or.jp - - [21/Jul/2004:11:07:39 +0900] "(\x97\x9f " 501 - "-" "-"
> xx.ap.plala.or.jp - - [21/Jul/2004:11:10:11 +0900] "\xb0\x01\xea\x1d" 501 - "-" "-"
> xx.ap.plala.or.jp - - [21/Jul/2004:11:29:46 +0900] "PBD\x1e" 501 - "-" "-"
> xx.ap.plala.or.jp - - [21/Jul/2004:11:51:25 +0900] "\xa85a\x1e" 501 - "-" "-"
> xx.ap.plala.or.jp - - [21/Jul/2004:12:02:31 +0900] "x\xed\xb6 " 501 - "-" "-"
> xx.ap.plala.or.jp - - [21/Jul/2004:12:08:37 +0900] "\x90\xecw\x1e" 501 - "-" "-"
> xx.ap.plala.or.jp - - [21/Jul/2004:12:09:47 +0900] "x\x92y\x1e" 501 - "-" "-"
> xx.ap.plala.or.jp - - [21/Jul/2004:12:14:14 +0900] "\x90e\x7f\x1e" 501 - "-" "-"
> xx.ap.plala.or.jp - - [21/Jul/2004:12:14:38 +0900] "\x80\x04\x85\x1e" 501 - "-" 

以下がエラーログです。
↓
[Wed Jul 21 11:04:00 2004] [error] [client 218.44.88.xxx] Invalid URI in request \xa0 "\x1e
[Wed Jul 21 11:07:39 2004] [error] [client 218.44.118.xxx] Invalid method in request (\\x97\\x9f 
[Wed Jul 21 11:10:11 2004] [error] [client 218.44.126.xxx] Invalid method in request \\xb0\\x01\\xea\\x1d
[Wed Jul 21 11:29:46 2004] [error] [client 218.44.88.xxx] Invalid method in request PBD\\x1e
[Wed Jul 21 11:51:25 2004] [error] [client 218.44.88.xxx] Invalid method in request \\xa85a\\x1e
[Wed Jul 21 12:02:31 2004] [error] [client 218.44.118.xxx] Invalid method in request x\\xed\\xb6 
[Wed Jul 21 12:08:37 2004] [error] [client 218.44.88.xxx] Invalid method in request \\x90\\xecw\\x1e
[Wed Jul 21 12:09:47 2004] [error] [client 218.44.88.xxx] Invalid method in request x\\x92y\\x1e
[Wed Jul 21 12:14:14 2004] [error] [client 218.44.88.xxx] Invalid method in request \\x90e\\x7f\\x1e
[Wed Jul 21 12:14:38 2004] [error] [client 218.44.113.xxx] Invalid method in request \\x80\\x04\\x85\\x1e

#それにしてもplalaのユーザからのウィルス攻撃は凄い。

-- 
Ichikawa Jun'ichi
CP Data Corp.