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сервис_fail2ban [2020/06/25 16:36] val [Интеграция fail2ban и snort] |
сервис_fail2ban [2022/03/09 11:39] val [Интеграция fail2ban и cisco log] |
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* [[https://thefragens.com/2010/11/checking-fail2ban-regex/|Checking Fail2ban regex]] | * [[https://thefragens.com/2010/11/checking-fail2ban-regex/|Checking Fail2ban regex]] | ||
+ | * [[https://forum.yunohost.org/t/fail2ban-high-cpu-usage/2439|Fail2ban high CPU usage]] | ||
===== Установка ===== | ===== Установка ===== | ||
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<code> | <code> | ||
- | # apt install fail2ban | + | debian11# apt install iptables |
- | # cd /etc/fail2ban/ | + | # apt install fail2ban |
</code> | </code> | ||
Line 15: | Line 16: | ||
<code> | <code> | ||
- | # cat jail.conf | + | # cat /etc/fail2ban/jail.conf |
+ | |||
+ | # ls /etc/fail2ban/jail.d/ | ||
- | # ls jail.d/ | + | # cat /etc/fail2ban/jail.d/defaults-debian.conf |
- | # cat filter.d/sshd.conf | + | # cat /etc/fail2ban/filter.d/sshd.conf |
- | # cat filter.d/asterisk.conf | + | # cat /etc/fail2ban/filter.d/asterisk.conf |
</code><code> | </code><code> | ||
- | # cat jail.local | + | # cat /etc/fail2ban/jail.local |
</code><code> | </code><code> | ||
[sshd] | [sshd] | ||
Line 30: | Line 33: | ||
[asterisk] | [asterisk] | ||
enabled = true | enabled = true | ||
- | maxretry = 3 | + | maxretry = 3 |
</code> | </code> | ||
Line 53: | Line 56: | ||
===== Интеграция fail2ban и cisco log ===== | ===== Интеграция fail2ban и cisco log ===== | ||
+ | |||
+ | * Резервное копирование конфигурации | ||
+ | |||
<code> | <code> | ||
# cat /etc/fail2ban/jail.d/cisco-change-config.conf | # cat /etc/fail2ban/jail.d/cisco-change-config.conf | ||
Line 66: | Line 72: | ||
# cat /etc/fail2ban/filter.d/cisco-change-config.conf | # cat /etc/fail2ban/filter.d/cisco-change-config.conf | ||
</code><code> | </code><code> | ||
- | [INCLUDES] | ||
- | |||
[Definition] | [Definition] | ||
Line 79: | Line 83: | ||
cd /srv/tftp/ | cd /srv/tftp/ | ||
/usr/bin/git add * | /usr/bin/git add * | ||
- | /usr/bin/git status | grep 'modified\|deleted\|new file' | /usr/bin/git commit -a -F - | + | /usr/bin/git --no-optional-locks status | grep 'modified\|deleted\|new file' | /usr/bin/git commit -a -F - |
</code> | </code> | ||
===== Интеграция fail2ban и snort ===== | ===== Интеграция fail2ban и snort ===== | ||
Line 94: | Line 98: | ||
maxretry = 1 | maxretry = 1 | ||
logpath = /var/log/auth.log | logpath = /var/log/auth.log | ||
- | #action = iptables-allports | + | #action = mail-admin |
+ | #action = iptables-allports-forward | ||
#action = cisco-acl | #action = cisco-acl | ||
</code><code> | </code><code> | ||
# cat /etc/fail2ban/filter.d/snort_filter.conf | # cat /etc/fail2ban/filter.d/snort_filter.conf | ||
</code><code> | </code><code> | ||
- | [INCLUDES] | ||
- | |||
[Definition] | [Definition] | ||
failregex = .*snort.*Priority: 1.*} <HOST>.* | failregex = .*snort.*Priority: 1.*} <HOST>.* | ||
# .*snort.*Priority: 2.*} <HOST>.* | # .*snort.*Priority: 2.*} <HOST>.* | ||
+ | </code> | ||
- | ignoreregex = | + | ==== Уведомление по email ==== |
+ | <code> | ||
+ | # cat /etc/fail2ban/action.d/mail-admin.conf | ||
+ | </code><code> | ||
+ | [Definition] | ||
+ | |||
+ | actionban = printf %%b "Hi,\n | ||
+ | Ban this <ip> | ||
+ | Regards,\n | ||
+ | Fail2Ban"|mail -s "[Fail2Ban] Ban <name> <ip>" <dest> | ||
+ | |||
+ | actionunban = printf %%b "Hi,\n | ||
+ | Unban this <ip> | ||
+ | Regards,\n | ||
+ | Fail2Ban"|mail -s "[Fail2Ban] Unban <name> <ip>" <dest> | ||
+ | |||
+ | [Init] | ||
+ | |||
+ | name = mail-admin | ||
+ | |||
+ | dest = student | ||
</code> | </code> | ||
Line 112: | Line 136: | ||
<code> | <code> | ||
- | # iptables -A FORWARD -j f2b-default | + | # cp /etc/fail2ban/action.d/iptables-allports.conf /etc/fail2ban/action.d/iptables-allports-forward.conf |
+ | |||
+ | # cat /etc/fail2ban/action.d/iptables-allports-forward.conf | ||
+ | </code><code> | ||
+ | ... | ||
+ | before = iptables-common-forward.conf | ||
+ | ... | ||
+ | </code><code> | ||
+ | # cp /etc/fail2ban/action.d/iptables-common.conf /etc/fail2ban/action.d/iptables-common-forward.conf | ||
+ | |||
+ | # cat /etc/fail2ban/action.d/iptables-common-forward.conf | ||
+ | </code><code> | ||
+ | ... | ||
+ | chain = FORWARD | ||
+ | ... | ||
</code> | </code> | ||
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permit udp any any | permit udp any any | ||
permit tcp any any established | permit tcp any any established | ||
- | deny ip any any log | + | deny ip any any # log |
end | end | ||
</code><code> | </code><code> | ||
Line 162: | Line 200: | ||
actionunban = /root/cisco-change-firewall.sh | actionunban = /root/cisco-change-firewall.sh | ||
+ | # if atack from DNS) | ||
+ | #actionunban = echo /root/cisco-change-firewall.sh | at now + 1 min | ||
</code> | </code> | ||