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сервис_fail2ban
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| Both sides previous revision Previous revision Next revision | Previous revision Next revision Both sides next revision | ||
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сервис_fail2ban [2020/11/18 20:17] val [Блокировка через cisco acl] |
сервис_fail2ban [2024/05/09 11:01] val [Установка] |
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| Line 6: | Line 6: | ||
| * [[https://help.ubuntu.com/community/Fail2ban|Fail2ban]] | * [[https://help.ubuntu.com/community/Fail2ban|Fail2ban]] | ||
| + | * [[https://bugs.launchpad.net/ubuntu/+source/fail2ban/+bug/2055114|fail2ban is broken in 24.04 Noble]] | ||
| <code> | <code> | ||
| + | debian11# apt install iptables | ||
| + | debian12# apt install iptables rsyslog | ||
| + | |||
| # apt install fail2ban | # apt install fail2ban | ||
| + | |||
| + | ubuntu24# wget https://launchpad.net/ubuntu/+source/fail2ban/1.1.0-1/+build/28291332/+files/fail2ban_1.1.0-1_all.deb | ||
| + | ubuntu24# dpkg -i fail2ban_1.1.0-1_all.deb | ||
| </code> | </code> | ||
| Line 28: | Line 35: | ||
| [sshd] | [sshd] | ||
| maxretry = 6 | maxretry = 6 | ||
| + | #ignoreip = 192.168.X.0/24 192.168.100+X.0/24 | ||
| [asterisk] | [asterisk] | ||
| enabled = true | enabled = true | ||
| maxretry = 3 | maxretry = 3 | ||
| + | #bantime = 30d | ||
| + | #action = iptables-allports[blocktype=DROP] | ||
| + | #action = route[blocktype=blackhole] | ||
| </code> | </code> | ||
| Line 54: | Line 65: | ||
| ===== 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 78: | Line 92: | ||
| 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 91: | Line 105: | ||
| bantime = 300 | bantime = 300 | ||
| filter = snort_filter | filter = snort_filter | ||
| - | maxretry = 1 | + | maxretry = 3 |
| logpath = /var/log/auth.log | logpath = /var/log/auth.log | ||
| + | #action = mail-admin | ||
| #action = iptables-allports-forward | #action = iptables-allports-forward | ||
| #action = cisco-acl | #action = cisco-acl | ||
| Line 102: | Line 117: | ||
| failregex = .*snort.*Priority: 1.*} <HOST>.* | failregex = .*snort.*Priority: 1.*} <HOST>.* | ||
| # .*snort.*Priority: 2.*} <HOST>.* | # .*snort.*Priority: 2.*} <HOST>.* | ||
| + | </code> | ||
| + | |||
| + | ==== 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 127: | Line 165: | ||
| <code> | <code> | ||
| + | server# rsh router show access-lists | ||
| + | </code><code> | ||
| # cat /root/cisco-acl-deny.sh | # cat /root/cisco-acl-deny.sh | ||
| </code><code> | </code><code> | ||
| Line 146: | Line 186: | ||
| 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 170: | Line 210: | ||
| actionban = /root/cisco-change-firewall.sh | actionban = /root/cisco-change-firewall.sh | ||
| - | # f2b bug | + | actionunban = /root/cisco-change-firewall.sh |
| - | actionunban = echo /root/cisco-change-firewall.sh | at now + 1 min | + | # if atack from DNS) |
| + | #actionunban = echo /root/cisco-change-firewall.sh | at now + 1 min | ||
| </code> | </code> | ||
сервис_fail2ban.txt · Last modified: 2024/05/11 15:47 by val
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