エラーログ「client denied by server configuration」と不正アクセスへの対処

第１　エラーログのclient denied by server configuration

その意味をネットで調べて、さくらインターネット様によると

ログに残ったフォルダにアクセス制限を

その１　かけている場合は、設定が正しく機能しているという正常な履歴

その２　かけている場合でも、設定ミスによるアクセスの失敗の可能性

その３　かけていない場合は、サーバー側の設定で間違っている可能性

ただし、「短時間に何度もアクセスしていると思われる履歴」の場合は

[Wed Jun 02 08:08:44.021125 2021] [client 216.244.XXX.XXX:35688] AH01797: client denied by server configuration:
[Wed Jun 02 08:08:44.026993 2021] [client 216.244.XXX.XXX:35694] AH01797: client denied by server configuration:
[Wed Jun 02 08:08:44.032742 2021] [client 216.244.XXX.XXX:35698] AH01797: client denied by server configuration:

DOS攻撃、DDOS攻撃の可能性があるので注意が必要とのことでした。

第２　不正アクセスへの対処

下記のような行為を不正アクセスと言い、こういう人達がいるから、アクセスログ機能が必要だと思います。

私の知識レベル

素人。特に勉強しているわけではありません。

被害状況

ゼロ

相手の行動時間

2021年6月9日の 8時29分00秒から8時29分15秒という短い間に、連続したアクセスで、人間の動作ではないのは明らか

相手の行動内容

存在しないフォルダの存在チェック

実際のログ

[Wed Jun 09 08:29:00.652134 2021] [access_compat:error] [pid 39723:tid 140294536189696] [client 45.133.1.xx:38134] AH01797: client denied by server configuration: /home/xxxxxx/xxxxx.com/public_html/.env
[Wed Jun 09 08:29:00.845755 2021] [access_compat:error] [pid 39723:tid 140294544582400] [client 45.133.1.xx:38236] AH01797: client denied by server configuration: /home/xxxxxx/xxxxx.com/public_html/.env
[Wed Jun 09 08:29:00.998196 2021] [access_compat:error] [pid 39723:tid 140294469048064] [client 45.133.1.xx:38330] AH01797: client denied by server configuration: /home/xxxxxx/xxxxx.com/public_html/.env
[Wed Jun 09 08:29:01.492409 2021] [access_compat:error] [pid 39728:tid 140294376728320] [client 45.133.1.xx:38622] AH01797: client denied by server configuration: /home/xxxxxx/xxxxx.com/public_html/.env
[Wed Jun 09 08:29:01.802003 2021] [access_compat:error] [pid 39723:tid 140294662080256] [client 45.133.1.xx:38810] AH01797: client denied by server configuration: /home/xxxxxx/xxxxx.com/public_html/vendor
[Wed Jun 09 08:29:01.810583 2021] [access_compat:error] [pid 39723:tid 140294427084544] [client 45.133.1.xx:38816] AH01797: client denied by server configuration: /home/xxxxxx/xxxxx.com/public_html/.env
[Wed Jun 09 08:29:01.846464 2021] [access_compat:error] [pid 39723:tid 140294670472960] [client 45.133.1.xx:38830] AH01797: client denied by server configuration: /home/xxxxxx/xxxxx.com/public_html/.env
[Wed Jun 09 08:29:01.987921 2021] [access_compat:error] [pid 39723:tid 140294292801280] [client 45.133.1.xx:38918] AH01797: client denied by server configuration: /home/xxxxxx/xxxxx.com/public_html/.env
[Wed Jun 09 08:29:01.999093 2021] [access_compat:error] [pid 39723:tid 140294586545920] [client 45.133.1.xx:38926] AH01797: client denied by server configuration: /home/xxxxxx/xxxxx.com/public_html/.env
[Wed Jun 09 08:29:02.167494 2021] [access_compat:error] [pid 39723:tid 140294192088832] [client 45.133.1.xx:39102] AH01797: client denied by server configuration: /home/xxxxxx/xxxxx.com/public_html/.env
[Wed Jun 09 08:29:02.214033 2021] [access_compat:error] [pid 39723:tid 140294376728320] [client 45.133.1.xx:39150] AH01797: client denied by server configuration: /home/xxxxxx/xxxxx.com/public_html/.env
[Wed Jun 09 08:29:02.235371 2021] [access_compat:error] [pid 39725:tid 140294385121024] [client 45.133.1.xx:39176] AH01797: client denied by server configuration: /home/xxxxxx/xxxxx.com/public_html/.env
[Wed Jun 09 08:29:02.254572 2021] [access_compat:error] [pid 39723:tid 140294477440768] [client 45.133.1.xx:39188] AH01797: client denied by server configuration: /home/xxxxxx/xxxxx.com/public_html/vendor
[Wed Jun 09 08:29:02.417552 2021] [access_compat:error] [pid 39723:tid 140294284408576] [client 45.133.1.xx:39302] AH01797: client denied by server configuration: /home/xxxxxx/xxxxx.com/public_html/.env
[Wed Jun 09 08:29:02.686101 2021] [access_compat:error] [pid 39728:tid 140294410299136] [client 45.133.1.xx:39492] AH01797: client denied by server configuration: /home/xxxxxx/xxxxx.com/public_html/.env
[Wed Jun 09 08:29:02.768129 2021] [access_compat:error] [pid 39723:tid 140294443869952] [client 45.133.1.xx:39576] AH01797: client denied by server configuration: /home/xxxxxx/xxxxx.com/public_html/.env
[Wed Jun 09 08:29:02.887563 2021] [access_compat:error] [pid 39728:tid 140294351550208] [client 45.133.1.xx:39644] AH01797: client denied by server configuration: /home/xxxxxx/xxxxx.com/public_html/vendor
[Wed Jun 09 08:29:02.895752 2021] [access_compat:error] [pid 39723:tid 140294393513728] [client 45.133.1.xx:39650] AH01797: client denied by server configuration: /home/xxxxxx/xxxxx.com/public_html/vendor
[Wed Jun 09 08:29:02.900169 2021] [access_compat:error] [pid 39728:tid 140294343157504] [client 45.133.1.xx:39656] AH01797: client denied by server configuration: /home/xxxxxx/xxxxx.com/public_html/.env
[Wed Jun 09 08:29:03.166998 2021] [access_compat:error] [pid 39723:tid 140294007449344] [client 45.133.1.xx:39786] AH01797: client denied by server configuration: /home/xxxxxx/xxxxx.com/public_html/vendor
[Wed Jun 09 08:29:03.197046 2021] [access_compat:error] [pid 39729:tid 140294620116736] [client 45.133.1.xx:39796] AH01797: client denied by server configuration: /home/xxxxxx/xxxxx.com/public_html/vendor
[Wed Jun 09 08:29:03.219060 2021] [access_compat:error] [pid 39723:tid 140293847987968] [client 45.133.1.xx:39818] AH01797: client denied by server configuration: /home/xxxxxx/xxxxx.com/public_html/storage
[Wed Jun 09 08:29:03.368295 2021] [access_compat:error] [pid 39729:tid 140294536189696] [client 45.133.1.xx:39890] AH01797: client denied by server configuration: /home/xxxxxx/xxxxx.com/public_html/vendor
[Wed Jun 09 08:29:03.440016 2021] [access_compat:error] [pid 39728:tid 140294284408576] [client 45.133.1.xx:39908] AH01797: client denied by server configuration: /home/xxxxxx/xxxxx.com/public_html/vendor
[Wed Jun 09 08:29:03.729046 2021] [access_compat:error] [pid 39723:tid 140293948700416] [client 45.133.1.xx:40082] AH01797: client denied by server configuration: /home/xxxxxx/xxxxx.com/public_html/storage
[Wed Jun 09 08:29:03.733521 2021] [access_compat:error] [pid 39723:tid 140293814417152] [client 45.133.1.xx:40084] AH01797: client denied by server configuration: /home/xxxxxx/xxxxx.com/public_html/vendor
[Wed Jun 09 08:29:04.114481 2021] [access_compat:error] [pid 39728:tid 140294259230464] [client 45.133.1.xx:40234] AH01797: client denied by server configuration: /home/xxxxxx/xxxxx.com/public_html/vendor
[Wed Jun 09 08:29:04.184943 2021] [access_compat:error] [pid 39723:tid 140293898344192] [client 45.133.1.xx:40258] AH01797: client denied by server configuration: /home/xxxxxx/xxxxx.com/public_html/vendor
[Wed Jun 09 08:29:04.202531 2021] [access_compat:error] [pid 39723:tid 140293772453632] [client 45.133.1.xx:40274] AH01797: client denied by server configuration: /home/xxxxxx/xxxxx.com/public_html/storage
[Wed Jun 09 08:29:04.333141 2021] [access_compat:error] [pid 39723:tid 140293915129600] [client 45.133.1.xx:40326] AH01797: client denied by server configuration: /home/xxxxxx/xxxxx.com/public_html/storage
[Wed Jun 09 08:29:04.392383 2021] [access_compat:error] [pid 39723:tid 140294158518016] [client 45.133.1.xx:40338] AH01797: client denied by server configuration: /home/xxxxxx/xxxxx.com/public_html/vendor
[Wed Jun 09 08:29:04.611842 2021] [access_compat:error] [pid 39723:tid 140294636902144] [client 45.133.1.xx:40428] AH01797: client denied by server configuration: /home/xxxxxx/xxxxx.com/public_html/public
[Wed Jun 09 08:29:04.618335 2021] [access_compat:error] [pid 39723:tid 140294754400000] [client 45.133.1.xx:40434] AH01797: client denied by server configuration: /home/xxxxxx/xxxxx.com/public_html/vendor
[Wed Jun 09 08:29:04.764130 2021] [access_compat:error] [pid 39728:tid 140293738882816] [client 45.133.1.xx:40504] AH01797: client denied by server configuration: /home/xxxxxx/xxxxx.com/public_html/storage
[Wed Jun 09 08:29:04.884468 2021] [access_compat:error] [pid 39723:tid 140294452262656] [client 45.133.1.xx:40554] AH01797: client denied by server configuration: /home/xxxxxx/xxxxx.com/public_html/public
[Wed Jun 09 08:29:04.918890 2021] [access_compat:error] [pid 39723:tid 140294628509440] [client 45.133.1.xx:40572] AH01797: client denied by server configuration: /home/xxxxxx/xxxxx.com/public_html/vendor
[Wed Jun 09 08:29:04.945897 2021] [access_compat:error] [pid 39723:tid 140293906736896] [client 45.133.1.xx:40588] AH01797: client denied by server configuration: /home/xxxxxx/xxxxx.com/public_html/storage
[Wed Jun 09 08:29:05.123660 2021] [access_compat:error] [pid 39723:tid 140294401906432] [client 45.133.1.xx:40658] AH01797: client denied by server configuration: /home/xxxxxx/xxxxx.com/public_html/storage
[Wed Jun 09 08:29:05.158377 2021] [access_compat:error] [pid 39723:tid 140294720829184] [client 45.133.1.xx:40672] AH01797: client denied by server configuration: /home/xxxxxx/xxxxx.com/public_html/storage
[Wed Jun 09 08:29:05.347319 2021] [access_compat:error] [pid 39728:tid 140294242445056] [client 45.133.1.xx:40788] AH01797: client denied by server configuration: /home/xxxxxx/xxxxx.com/public_html/storage
[Wed Jun 09 08:29:05.373672 2021] [access_compat:error] [pid 39728:tid 140294192088832] [client 45.133.1.xx:40796] AH01797: client denied by server configuration: /home/xxxxxx/xxxxx.com/public_html/storage
[Wed Jun 09 08:29:05.450888 2021] [access_compat:error] [pid 39729:tid 140294611724032] [client 45.133.1.xx:40838] AH01797: client denied by server configuration: /home/xxxxxx/xxxxx.com/public_html/vendor
[Wed Jun 09 08:29:05.551944 2021] [access_compat:error] [pid 39723:tid 140294611724032] [client 45.133.1.xx:40870] AH01797: client denied by server configuration: /home/xxxxxx/xxxxx.com/public_html/storage
[Wed Jun 09 08:29:05.640570 2021] [access_compat:error] [pid 39723:tid 140294410299136] [client 45.133.1.xx:40938] AH01797: client denied by server configuration: /home/xxxxxx/xxxxx.com/public_html/.env
[Wed Jun 09 08:29:05.854133 2021] [access_compat:error] [pid 39728:tid 140293696919296] [client 45.133.1.xx:41038] AH01797: client denied by server configuration: /home/xxxxxx/xxxxx.com/public_html/public
[Wed Jun 09 08:29:05.855025 2021] [access_compat:error] [pid 39728:tid 140294502618880] [client 45.133.1.xx:41040] AH01797: client denied by server configuration: /home/xxxxxx/xxxxx.com/public_html/public
[Wed Jun 09 08:29:05.970239 2021] [access_compat:error] [pid 39723:tid 140294317979392] [client 45.133.1.xx:41126] AH01797: client denied by server configuration: /home/xxxxxx/xxxxx.com/public_html/public
[Wed Jun 09 08:29:06.390695 2021] [access_compat:error] [pid 39728:tid 140294460655360] [client 45.133.1.xx:41334] AH01797: client denied by server configuration: /home/xxxxxx/xxxxx.com/public_html/storage
[Wed Jun 09 08:29:06.484275 2021] [access_compat:error] [pid 39723:tid 140294494226176] [client 45.133.1.xx:41378] AH01797: client denied by server configuration: /home/xxxxxx/xxxxx.com/public_html/public
[Wed Jun 09 08:29:06.506403 2021] [access_compat:error] [pid 39728:tid 140294695651072] [client 45.133.1.xx:41404] AH01797: client denied by server configuration: /home/xxxxxx/xxxxx.com/public_html/storage
[Wed Jun 09 08:29:06.525609 2021] [access_compat:error] [pid 39728:tid 140294687258368] [client 45.133.1.xx:41410] AH01797: client denied by server configuration: /home/xxxxxx/xxxxx.com/public_html/storage
[Wed Jun 09 08:29:06.538025 2021] [access_compat:error] [pid 39723:tid 140294284408576] [client 45.133.1.xx:41416] AH01797: client denied by server configuration: /home/xxxxxx/xxxxx.com/public_html/
[Wed Jun 09 08:29:06.598408 2021] [access_compat:error] [pid 39723:tid 140294334764800] [client 45.133.1.xx:41446] AH01797: client denied by server configuration: /home/xxxxxx/xxxxx.com/public_html/public
[Wed Jun 09 08:29:06.659394 2021] [access_compat:error] [pid 39723:tid 140294166910720] [client 45.133.1.xx:41480] AH01797: client denied by server configuration: /home/xxxxxx/xxxxx.com/public_html/.env
[Wed Jun 09 08:29:06.756237 2021] [access_compat:error] [pid 39728:tid 140294653687552] [client 45.133.1.xx:41508] AH01797: client denied by server configuration: /home/xxxxxx/xxxxx.com/public_html/
[Wed Jun 09 08:29:06.801189 2021] [access_compat:error] [pid 39723:tid 140294133339904] [client 45.133.1.xx:41532] AH01797: client denied by server configuration: /home/xxxxxx/xxxxx.com/public_html/public
[Wed Jun 09 08:29:06.892489 2021] [access_compat:error] [pid 39723:tid 140294393513728] [client 45.133.1.xx:41608] AH01797: client denied by server configuration: /home/xxxxxx/xxxxx.com/public_html/storage
[Wed Jun 09 08:29:06.927386 2021] [access_compat:error] [pid 39723:tid 140294242445056] [client 45.133.1.xx:41628] AH01797: client denied by server configuration: /home/xxxxxx/xxxxx.com/public_html/public
[Wed Jun 09 08:29:07.350279 2021] [access_compat:error] [pid 39723:tid 140294250837760] [client 45.133.1.xx:41878] AH01797: client denied by server configuration: /home/xxxxxx/xxxxx.com/public_html/public
[Wed Jun 09 08:29:07.548665 2021] [access_compat:error] [pid 39728:tid 140294074590976] [client 45.133.1.xx:41936] AH01797: client denied by server configuration: /home/xxxxxx/xxxxx.com/public_html/vendor
[Wed Jun 09 08:29:07.633501 2021] [access_compat:error] [pid 39725:tid 140294536189696] [client 45.133.1.xx:41982] AH01797: client denied by server configuration: /home/xxxxxx/xxxxx.com/public_html/public
[Wed Jun 09 08:29:07.643174 2021] [access_compat:error] [pid 39723:tid 140294057805568] [client 45.133.1.xx:41988] AH01797: client denied by server configuration: /home/xxxxxx/xxxxx.com/public_html/
[Wed Jun 09 08:29:07.733473 2021] [access_compat:error] [pid 39723:tid 140294066198272] [client 45.133.1.xx:42010] AH01797: client denied by server configuration: /home/xxxxxx/xxxxx.com/public_html/
[Wed Jun 09 08:29:07.737797 2021] [access_compat:error] [pid 39728:tid 140294561367808] [client 45.133.1.xx:42012] AH01797: client denied by server configuration: /home/xxxxxx/xxxxx.com/public_html/
[Wed Jun 09 08:29:07.754614 2021] [access_compat:error] [pid 39723:tid 140294217266944] [client 45.133.1.xx:42016] AH01797: client denied by server configuration: /home/xxxxxx/xxxxx.com/public_html/public
[Wed Jun 09 08:29:07.871367 2021] [access_compat:error] [pid 39723:tid 140293898344192] [client 45.133.1.xx:42094] AH01797: client denied by server configuration: /home/xxxxxx/xxxxx.com/public_html/public
[Wed Jun 09 08:29:07.941247 2021] [access_compat:error] [pid 39723:tid 140294099769088] [client 45.133.1.xx:42112] AH01797: client denied by server configuration: /home/xxxxxx/xxxxx.com/public_html/public
[Wed Jun 09 08:29:08.372249 2021] [access_compat:error] [pid 39723:tid 140293747275520] [client 45.133.1.xx:42334] AH01797: client denied by server configuration: /home/xxxxxx/xxxxx.com/public_html/vendor
[Wed Jun 09 08:29:08.523848 2021] [access_compat:error] [pid 39723:tid 140294452262656] [client 45.133.1.xx:42386] AH01797: client denied by server configuration: /home/xxxxxx/xxxxx.com/public_html/
[Wed Jun 09 08:29:08.675435 2021] [access_compat:error] [pid 39723:tid 140294712436480] [client 45.133.1.xx:42522] AH01797: client denied by server configuration: /home/xxxxxx/xxxxx.com/public_html/
[Wed Jun 09 08:29:08.853683 2021] [access_compat:error] [pid 39723:tid 140294720829184] [client 45.133.1.xx:42576] AH01797: client denied by server configuration: /home/xxxxxx/xxxxx.com/public_html/
[Wed Jun 09 08:29:08.877442 2021] [access_compat:error] [pid 39728:tid 140294041020160] [client 45.133.1.xx:42582] AH01797: client denied by server configuration: /home/xxxxxx/xxxxx.com/public_html/public
[Wed Jun 09 08:29:08.885351 2021] [access_compat:error] [pid 39723:tid 140294704043776] [client 45.133.1.xx:42584] AH01797: client denied by server configuration: /home/xxxxxx/xxxxx.com/public_html/
[Wed Jun 09 08:29:09.083572 2021] [access_compat:error] [pid 39723:tid 140294569760512] [client 45.133.1.xx:42686] AH01797: client denied by server configuration: /home/xxxxxx/xxxxx.com/public_html/storage
[Wed Jun 09 08:29:09.130036 2021] [access_compat:error] [pid 39723:tid 140294662080256] [client 45.133.1.xx:42704] AH01797: client denied by server configuration: /home/xxxxxx/xxxxx.com/public_html/
[Wed Jun 09 08:29:09.182044 2021] [access_compat:error] [pid 39723:tid 140294317979392] [client 45.133.1.xx:42720] AH01797: client denied by server configuration: /home/xxxxxx/xxxxx.com/public_html/
[Wed Jun 09 08:29:09.475136 2021] [access_compat:error] [pid 39728:tid 140293948700416] [client 45.133.1.xx:42954] AH01797: client denied by server configuration: /home/xxxxxx/xxxxx.com/public_html/storage
[Wed Jun 09 08:29:09.947146 2021] [access_compat:error] [pid 39723:tid 140294326372096] [client 45.133.1.xx:43144] AH01797: client denied by server configuration: /home/xxxxxx/xxxxx.com/public_html/
[Wed Jun 09 08:29:10.068866 2021] [access_compat:error] [pid 39728:tid 140293957093120] [client 45.133.1.xx:43200] AH01797: client denied by server configuration: /home/xxxxxx/xxxxx.com/public_html/public
[Wed Jun 09 08:29:10.070913 2021] [access_compat:error] [pid 39723:tid 140294175303424] [client 45.133.1.xx:43214] AH01797: client denied by server configuration: /home/xxxxxx/xxxxx.com/public_html/
[Wed Jun 09 08:29:10.131845 2021] [access_compat:error] [pid 39723:tid 140294015842048] [client 45.133.1.xx:43248] AH01797: client denied by server configuration: /home/xxxxxx/xxxxx.com/public_html/
[Wed Jun 09 08:29:10.731325 2021] [access_compat:error] [pid 39723:tid 140293990663936] [client 45.133.1.xx:43698] AH01797: client denied by server configuration: /home/xxxxxx/xxxxx.com/public_html/
[Wed Jun 09 08:29:10.934596 2021] [access_compat:error] [pid 39723:tid 140293931915008] [client 45.133.1.xx:43834] AH01797: client denied by server configuration: /home/xxxxxx/xxxxx.com/public_html/
[Wed Jun 09 08:29:11.351864 2021] [access_compat:error] [pid 39728:tid 140294124947200] [client 45.133.1.xx:43990] AH01797: client denied by server configuration: /home/xxxxxx/xxxxx.com/public_html/.env
[Wed Jun 09 08:29:11.553608 2021] [access_compat:error] [pid 39728:tid 140293831202560] [client 45.133.1.xx:44060] AH01797: client denied by server configuration: /home/xxxxxx/xxxxx.com/public_html/public
[Wed Jun 09 08:29:12.317208 2021] [access_compat:error] [pid 39723:tid 140294276015872] [client 45.133.1.xx:44394] AH01797: client denied by server configuration: /home/xxxxxx/xxxxx.com/public_html/vendor
[Wed Jun 09 08:29:12.548604 2021] [access_compat:error] [pid 39723:tid 140294007449344] [client 45.133.1.xx:44466] AH01797: client denied by server configuration: /home/xxxxxx/xxxxx.com/public_html/
[Wed Jun 09 08:29:13.190470 2021] [access_compat:error] [pid 39723:tid 140293940307712] [client 45.133.1.xx:44752] AH01797: client denied by server configuration: /home/xxxxxx/xxxxx.com/public_html/storage
[Wed Jun 09 08:29:14.180762 2021] [access_compat:error] [pid 39723:tid 140294645294848] [client 45.133.1.xx:45418] AH01797: client denied by server configuration: /home/xxxxxx/xxxxx.com/public_html/public
[Wed Jun 09 08:29:15.650048 2021] [access_compat:error] [pid 39729:tid 140294041020160] [client 45.133.1.xx:46310] AH01797: client denied by server configuration: /home/xxxxxx/xxxxx.com/public_html/

対処方法

過去に「挙動がおかしいと思っていたIPアドレス」だったので、

.htaccessファイル内で

deny from 45.133.1.0/24

と拒否していました。その結果、

相手が存在しないフォルダの有無チェックをしていたが、アクセスそのものを拒否していたので、被害はゼロにできました。

相手は何者？

IPアドレスから

オランダの仮想サーバー内からのアクセス

というところまで。私は素人なので、これ以上の詳しいデータはわかりませんし、アクセスを拒否することしかできませんでした。

彼らをハッカーと言うのでしょうが、彼らがいなければアクセスログを残す必要もないし、調べる時間も必要ないはずです。

一部の悪意を持った人間のために、ムダな時間とお金をかけ、必要以上にセキュリティをかける。

なんとも不愉快な話です。

もし不正なアクセスが成功していたら？

ネット上の諸先輩方の話によれば

・該当のフォルダが存在し、かつそのフォルダに機密データがあれば盗聴され漏えいする可能性

・このサーバーへの負荷が大きくなり、自分のサイトの閲覧や更新に「時間がかかり重い」と感じたり、最悪更新できなくなる可能性

・ウイルスを投下され、他社サーバーへの攻撃用として悪用された可能性。つまり、他社のサーバーに負荷がかかり閲覧できない状態にする、踏み台にされる可能性。

かなり昔、「本人は何も悪くない」が踏み台にされた人が、当時知識のなかった警察に誤認逮捕された事件がありました。

などが考えられます。

それらを防ぐには？

Q.全く自信がない方

A.業者に任せるべきです。

Q.自分でできる範囲でしたい

A.ネット上の諸先輩方の情報を参考にして下さい。

当方で拙作ですが

・中国からの不正アクセス

・もしワードプレスをお使いなら

[WordPress]最低限のセキュリティ対策

に私なりの知識で書いています。

第１ エラーログのclient denied by server configuration

第２ 不正アクセスへの対処