フィルタが機能しても、Fail2banはactionbanを起動しません。

WAF IP セットから IP を追加および削除して、AWS インスタンスのウェブサイトに対する悪意のあるリクエストをフィルタリングしようとしています。この問題を解決するためにFail2banを設定しようとしています。

以下はファイルです -

地域刑務所

[my-jail]
enabled = true
filter = my-filter
action = my-action
  sendmail-whois[name=Fail2Ban Test, [email protected], [email protected], sendername="Fail2Ban"]
logpath = /var/log/apache2/frontend-app-my-org-com-access.log
maxretry = 4
findtime = 60
bantime = 300
journalmatch = _SYSTEMD_UNIT=httpd.service

myactions.conf

[Definition]

actionstart = touch /var/log/fail2ban_debug.log
actionstop = rm -f /var/log/fail2ban_debug.log

actionban = /opt/scripts/ban.sh Ban <ip>
actionunban = /opt/scripts/ban.sh Unban <ip>

注：/opt/scripts/ban.sh実行可能であり、/opt/scripts/ban.sh Ban 10.10.10.10手動でテストしたときに期待される結果が得られます。すべてのファイルはユーザーが所有および管理しますroot。 Fail2banサービスはrootユーザーによっても開始されます。

myfilter.conf

[Definition]
failregex = ^<HOST> - - \[.*\] \".*.my-org.*\" \".*\" [4-5][0-9][0-9]

正規表現検査

ログに基づいてフィルタを手動で確認すると機能します。

[root@ip-172-31-89-74 action.d]# fail2ban-regex /var/log/apache2/frontend-app-my-org-com-access.log /etc/fail2ban/filter.d/my-filter.conf | grep matched
Lines: 2325 lines, 0 ignored, 2325 matched, 0 missed

丸太

2023-10-16 15:03:08,737 fail2ban.server         [9162]: INFO    --------------------------------------------------
2023-10-16 15:03:08,737 fail2ban.server         [9162]: INFO    Starting Fail2ban v0.11.2
2023-10-16 15:03:08,737 fail2ban.server         [9162]: DEBUG   Creating PID file /var/run/fail2ban/fail2ban.pid
2023-10-16 15:03:08,738 fail2ban.observer       [9162]: INFO    Observer start...
2023-10-16 15:03:08,738 fail2ban.server         [9162]: DEBUG   Starting communication
2023-10-16 15:03:08,742 fail2ban.database       [9162]: INFO    Connected to fail2ban persistent database '/var/lib/fail2ban/fail2ban.sqlite3'
2023-10-16 15:03:08,742 fail2ban.jail           [9162]: INFO    Creating new jail 'my-jail'
2023-10-16 15:03:08,748 fail2ban.jail           [9162]: INFO    Jail 'my-jail' uses systemd {}
2023-10-16 15:03:08,748 fail2ban.filter         [9162]: DEBUG   Setting usedns = warn for FilterSystemd(Jail('my-jail'))
2023-10-16 15:03:08,748 fail2ban.filter         [9162]: DEBUG   Created FilterSystemd(Jail('my-jail'))
2023-10-16 15:03:08,749 fail2ban.filtersystemd  [9162]: DEBUG   Created FilterSystemd
2023-10-16 15:03:08,749 fail2ban.jail           [9162]: INFO    Initiated 'systemd' backend
2023-10-16 15:03:08,749 fail2ban.filter         [9162]: DEBUG   Setting usedns = warn for FilterSystemd(Jail('my-jail'))
2023-10-16 15:03:08,749 fail2ban.server         [9162]: DEBUG     failregex: '^<HOST> - - \\[.*\\] \\".*.my-org.*\\" \\".*\\" [4-5][0-9][0-9]'
2023-10-16 15:03:08,750 fail2ban.filtersystemd  [9162]: INFO    [my-jail] Added journal match for: '_SYSTEMD_UNIT=httpd.service'
2023-10-16 15:03:08,750 fail2ban.filter         [9162]: INFO      maxRetry: 4
2023-10-16 15:03:08,750 fail2ban.filter         [9162]: INFO      encoding: UTF-8
2023-10-16 15:03:08,750 fail2ban.filter         [9162]: INFO      findtime: 60
2023-10-16 15:03:08,750 fail2ban.actions        [9162]: INFO      banTime: 300
2023-10-16 15:03:08,750 fail2ban.CommandAction  [9162]: DEBUG   Created <class 'fail2ban.server.action.CommandAction'>
2023-10-16 15:03:08,750 fail2ban.CommandAction  [9162]: DEBUG     Set actionunban = '/opt/scripts/ban.sh Unban <ip>'
2023-10-16 15:03:08,750 fail2ban.CommandAction  [9162]: DEBUG     Set actionstop = 'rm -f /var/log/fail2ban_debug.log'
2023-10-16 15:03:08,750 fail2ban.CommandAction  [9162]: DEBUG     Set actionban = '/opt/scripts/ban.sh Ban <ip>'
2023-10-16 15:03:08,750 fail2ban.CommandAction  [9162]: DEBUG     Set actionstart = 'touch /var/log/fail2ban_debug.log'
2023-10-16 15:03:08,751 fail2ban.CommandAction  [9162]: DEBUG     Set actname = 'my-action'
2023-10-16 15:03:08,751 fail2ban.CommandAction  [9162]: DEBUG     Set name = 'my-jail'
2023-10-16 15:03:08,751 fail2ban.jail           [9162]: DEBUG   Starting jail 'my-jail'
2023-10-16 15:03:08,753 fail2ban.jail           [9162]: INFO    Jail 'my-jail' started
2023-10-16 15:03:08,754 fail2ban.transmitter    [9162]: DEBUG   Status: ready
2023-10-16 15:03:08,756 fail2ban.utils          [9162]: DEBUG   7f36b00f7490 -- returned successfully 0

[root@ip-172-31-89-74 action.d]# systemctl status fail2ban
● fail2ban.service - Fail2Ban Service
   Loaded: loaded (/usr/lib/systemd/system/fail2ban.service; enabled; vendor preset: disabled)
   Active: active (running) since Mon 2023-10-16 15:03:08 CEST; 35min ago
     Docs: man:fail2ban(1)
  Process: 8983 ExecStop=/usr/bin/fail2ban-client stop (code=exited, status=0/SUCCESS)
  Process: 9160 ExecStartPre=/bin/mkdir -p /run/fail2ban (code=exited, status=0/SUCCESS)
 Main PID: 9162 (fail2ban-server)
   CGroup: /system.slice/fail2ban.service
           └─9162 /usr/bin/python2 -s /usr/bin/fail2ban-server -xf start

Oct 16 15:03:08 ip-172-31-89-74.eu-central-1.compute.internal systemd[1]: Starting Fail2Ban Service...
Oct 16 15:03:08 ip-172-31-89-74.eu-central-1.compute.internal systemd[1]: Started Fail2Ban Service.
Oct 16 15:03:08 ip-172-31-89-74.eu-central-1.compute.internal fail2ban-server[9162]: Server ready

特定のIPアドレスのbashでテスト

i=0;while true; do echo -e"\n---------------------------------$i-----------------------------\n"; curl -s -L testing.my-org.de/tests
; i=$(($i+1));

これにより、刑務所で予想されるログに行が生成されます。地元の

ログファイルがあり、actionstartが動作することを確認しました。サービスを再起動するたびに電子メールも届きます。私が何かを逃したのでしょうか、それとも何か間違っていますか？

より多くのデータ：

222.222.222.222 - - [16/Oct/2023:22:10:51 +0200] "testing.my-org.com" "GET /tests HTTP/1.1" 404 8043 61680 "-" "curl/7.88.1" "" "ea4uh580h9dl7tat34q2d5cjo7" 
222.222.222.222 - - [16/Oct/2023:22:10:52 +0200] "testing.my-org.com" "GET /tests HTTP/1.1" 404 8043 61976 "-" "curl/7.88.1" "" "uou7bo5pj4tgp2m9t5kulkmvn2" 
222.222.222.222 - - [16/Oct/2023:22:10:52 +0200] "testing.my-org.com" "GET /tests HTTP/1.1" 404 8043 68577 "-" "curl/7.88.1" "" "m3u0g2s41fa6igphsfecrdbg41"


[root@ip-172-31-89-74 apache2]# fail2ban-regex /var/log/apache2/frontend-app-my-org-com-access.log.1 /etc/fail2ban/filter.d/my-filter.conf

Running tests
=============

Use   failregex filter file : my-filter, basedir: /etc/fail2ban
Use         log file : /var/log/apache2/frontend-app-my-org-com-access.log.1
Use         encoding : UTF-8


Results
=======

Failregex: 2480 total
|-  #) [# of hits] regular expression
|   1) [2480] ^<HOST>
`-

Ignoreregex: 0 total

Date template hits:
|- [# of hits] date format
|  [2480] Day(?P<_sep>[-/])MON(?P=_sep)ExYear[ :]?24hour:Minute:Second(?:\.Microseconds)?(?: Zone offset)?
`-

Lines: 2480 lines, 0 ignored, 2480 matched, 0 missed
[processed in 0.17 sec]

[root@ip-172-31-89-74 apache2]# vim /etc/fail2ban/filter.d/my-filter.conf
[root@ip-172-31-89-74 apache2]# fail2ban-regex /var/log/apache2/frontend-app-my-org-com-access.log.1 /etc/fail2ban/filter.d/my-filter.conf

Running tests
=============

Use   failregex filter file : my-filter, basedir: /etc/fail2ban
Use         log file : /var/log/apache2/frontend-app-my-org-com-access.log.1
Use         encoding : UTF-8


Results
=======

Failregex: 2480 total
|-  #) [# of hits] regular expression
|   1) [2480] ^<HOST> - - \[.*\] \".*.my-org.*\" \".*\" [4-5][0-9][0-9]
`-

Ignoreregex: 0 total

Date template hits:
|- [# of hits] date format
|  [2480] Day(?P<_sep>[-/])MON(?P=_sep)ExYear[ :]?24hour:Minute:Second(?:\.Microseconds)?(?: Zone offset)?
`-

Lines: 2480 lines, 0 ignored, 2480 matched, 0 missed
[processed in 0.18 sec]