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сервис_fail2ban [2020/11/18 14:23] val [Интеграция fail2ban и snort] |
сервис_fail2ban [2025/10/20 12:00] (current) val [Мониторинг и управление] |
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| * [[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 | ||
| + | #port = 2222 | ||
| + | #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] | ||
| + | |||
| + | #https://github.com/fail2ban/fail2ban/discussions/3836|Asterisk 20.6 on Ubuntu 24.04: Fail2Ban not working | ||
| + | #backend = auto | ||
| + | #logpath = /var/log/asterisk/messages.log | ||
| </code> | </code> | ||
| Line 47: | Line 63: | ||
| # fail2ban-client status asterisk | # fail2ban-client status asterisk | ||
| + | |||
| + | # iptables-save | ||
| + | # nft list ruleset | ||
| # fail2ban-client set asterisk unbanip 172.16.1.150 | # fail2ban-client set asterisk unbanip 172.16.1.150 | ||
| Line 54: | Line 73: | ||
| ===== 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 100: | ||
| 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 ===== | ||
| * [[https://github.com/frankiejol/snortban|frankiejol/snortban]] | * [[https://github.com/frankiejol/snortban|frankiejol/snortban]] | ||
| + | * Сервис SNORT [[Сервис SNORT#Копирование alert_unified2 в syslog]] | ||
| <code> | <code> | ||
| Line 91: | Line 114: | ||
| 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 | ||
| #action = iptables-allports-forward | #action = iptables-allports-forward | ||
| #action = cisco-acl | #action = cisco-acl | ||
| Line 103: | Line 128: | ||
| # .*snort.*Priority: 2.*} <HOST>.* | # .*snort.*Priority: 2.*} <HOST>.* | ||
| - | ignoreregex = | + | #failregex = .*Original Client IP: <HOST>.* |
| </code> | </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> | ||
| + | |||
| + | * [[#Запуск и отладка]] | ||
| ==== Блокировка через iptables ==== | ==== Блокировка через iptables ==== | ||
| Line 126: | Line 176: | ||
| </code> | </code> | ||
| + | * [[#Запуск и отладка]] | ||
| ==== Блокировка через cisco acl ==== | ==== Блокировка через cisco acl ==== | ||
| <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 148: | Line 201: | ||
| 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 155: | Line 208: | ||
| #!/bin/sh | #!/bin/sh | ||
| - | cat > /root/firewall.acl <<EOF | + | cat > /srv/tftp/firewall.acl <<EOF |
| no ip access-list extended ACL_FIREWALL | no ip access-list extended ACL_FIREWALL | ||
| ip access-list extended ACL_FIREWALL | ip access-list extended ACL_FIREWALL | ||
| EOF | EOF | ||
| - | /root/cisco-acl-deny.sh >> /root/firewall.acl | + | /root/cisco-acl-deny.sh >> /srv/tftp/firewall.acl |
| - | cat /root/cisco-acl-permit.txt >> /root/firewall.acl | + | cat /root/cisco-acl-permit.txt >> /srv/tftp/firewall.acl |
| - | /usr/bin/rcp /root/firewall.acl router:running-config | + | #/usr/bin/rcp /srv/tftp/firewall.acl router:running-config |
| + | #/usr/bin/snmpset -c write -v2c router .1.3.6.1.4.1.9.2.1.53.192.168.X.10 string "firewall.acl" | ||
| </code><code> | </code><code> | ||
| # cat /etc/fail2ban/action.d/cisco-acl.conf | # cat /etc/fail2ban/action.d/cisco-acl.conf | ||
| Line 173: | Line 227: | ||
| 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> | ||
| + | * [[#Запуск и отладка]] | ||
| ===== Отладка собственных фильтров ===== | ===== Отладка собственных фильтров ===== | ||
сервис_fail2ban.1605698605.txt.gz · Last modified: 2020/11/18 14:23 by val
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