Sziasztok,
egész hétvégén a Fail2ban-el játszok, de az az érzésem, hogy nem fut jól, soha nem Bannol egyetlen egy IP-t sem.
pl: #cat /var/log/mail.log | grep warning -> nem teljes csak a töredéke.......
Mar 7 07:24:32 admin postfix/smtpd[28061]: warning: hostname host-92-44-114-112.reverse.superonline.net does not resolve to address 92.44.114.112: Name or
Mar 7 08:58:33 admin postfix/smtpd[2477]: warning: hostname no-reverse-dns-configured.com does not resolve to address 89.248.171.131
Mar 7 08:58:35 admin postfix/smtpd[2477]: warning: unknown[89.248.171.131]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Mar 7 09:30:20 admin postfix/smtpd[5809]: warning: hostname 114.79.160.30.dvois.com does not resolve to address 114.79.160.30: Name or service not known
Mar 7 10:02:20 admin postfix/smtpd[8868]: warning: hostname no-reverse-dns-configured.com does not resolve to address 89.248.171.131
Mar 7 10:02:20 admin postfix/smtpd[8874]: warning: hostname no-reverse-dns-configured.com does not resolve to address 89.248.171.131
Mar 7 10:02:22 admin postfix/smtpd[8868]: warning: unknown[89.248.171.131]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Mar 7 10:02:26 admin postfix/smtpd[8874]: warning: unknown[89.248.171.131]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Mar 7 10:56:26 admin postfix/smtpd[11919]: warning: hostname ip248-156.ibw.com does not resolve to address 187.49.248.156: Name or service not known
Mar 7 10:59:21 admin postfix/smtpd[12056]: warning: hostname main.akare.com.tr does not resolve to address 176.58.88.17: Name or service not known
Mar 7 11:13:43 admin postfix/smtpd[14376]: warning: hostname mail.sintercom.co.in does not resolve to address 114.143.188.236
Mar 7 11:23:53 admin postfix/smtpd[15019]: warning: hostname we.love.servers.at.ioflood.com does not resolve to address 184.164.73.180
Mar 7 11:26:37 admin postfix/smtpd[15078]: warning: hostname abts-north-static-160.136.160.122.airtelbroadband.in does not resolve to address 122.160.136.ot known
Mar 7 11:56:48 admin postfix/smtpd[16783]: warning: hostname 78.187.215.246.static.ttnet.com.tr does not resolve to address 78.187.215.246: Name or servic
Mar 7 11:58:19 admin postfix/smtpd[16783]: warning: hostname no-reverse-dns-configured.com does not resolve to address 89.248.171.131
Mar 7 11:58:21 admin postfix/smtpd[16783]: warning: unknown[89.248.171.131]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Hasonló a helyzet a syslogban szerintem vannak benne próbálkozások, de nem történik semmi.
# fail2ban-client status
Status
|- Number of jail: 31
`- Jail list: pure-ftpd, sendmail-auth, xinetd-fail, imscp, apache-multiport, apache-overflows, ssh, sasl, apache, apache-noscript, apache-modsecurity, pam-generic, ssh-iptables, postfix, ip-blacklist, apache-nohome, ssh-ddos, thp-ssh, ssh-blocklist, dropbear, mysqld-auth, sasl-iptables, rainloop, ssh-bsd-ipfw, roundcube, apache-tcpwrapper, dovecot, apache-badbots, nginx-http-auth, sendmail-reject, proftpd
A Fail2ban hibamentesen fut a rendszeremben!
Elvileg ezek közül valamelyik szűrőnek meg kellene fognia már a fail2bannek. Ezzel szeszemben a Fail2ban logja üres, csak az indítási bejegyzéseim vannak Info logbejegyzés mellett..
Tűzfalamban is meg vannak a fail2ban bejegyzések.
#iptables -L -n | grep fail2ban
fail2ban-thp-ssh tcp -- 0.0.0.0/0 0.0.0.0/0
fail2ban-ip-blacklist tcp -- 0.0.0.0/0 0.0.0.0/0
fail2ban-imscp tcp -- 0.0.0.0/0 0.0.0.0/0 multiport dports 8080,4443
fail2ban-mysqld-auth tcp -- 0.0.0.0/0 0.0.0.0/0 multiport dports 3306
fail2ban-sasl tcp -- 0.0.0.0/0 0.0.0.0/0 multiport dports 25,465,587,143,220,993,110,995
fail2ban-postfix tcp -- 0.0.0.0/0 0.0.0.0/0
fail2ban-proftpd tcp -- 0.0.0.0/0 0.0.0.0/0 multiport dports 21,20,990,989
fail2ban-rainloop tcp -- 0.0.0.0/0 0.0.0.0/0 multiport dports 8080,4443
fail2ban-roundcube tcp -- 0.0.0.0/0 0.0.0.0/0 multiport dports 8080,4443
fail2ban-apache-noscript tcp -- 0.0.0.0/0 0.0.0.0/0 multiport dports 80,443
fail2ban-apache-multiport tcp -- 0.0.0.0/0 0.0.0.0/0 multiport dports 80,443
fail2ban-apache tcp -- 0.0.0.0/0 0.0.0.0/0 multiport dports 80,443
fail2ban-ssh tcp -- 0.0.0.0/0 0.0.0.0/0 multiport dports 3791
fail2ban-SSH tcp -- 0.0.0.0/0 0.0.0.0/0 tcp dpt:22
fail2ban-dovecot tcp -- 0.0.0.0/0 0.0.0.0/0 multiport dports 110,995,143,993,587,465,4190
fail2ban-BadBots tcp -- 0.0.0.0/0 0.0.0.0/0 multiport dports 80,443
fail2ban-nginx-http-auth tcp -- 0.0.0.0/0 0.0.0.0/0 multiport dports 80,443
fail2ban-apache-nohome tcp -- 0.0.0.0/0 0.0.0.0/0 multiport dports 80,443
fail2ban-apache-overflows tcp -- 0.0.0.0/0 0.0.0.0/0 multiport dports 80,443
fail2ban-apache-modsecurity tcp -- 0.0.0.0/0 0.0.0.0/0 multiport dports 80,443
fail2ban-sasl tcp -- 0.0.0.0/0 0.0.0.0/0 tcp dpt:25
fail2ban-sendmail-auth tcp -- 0.0.0.0/0 0.0.0.0/0 multiport dports 587,465,25
fail2ban-sendmail-auth tcp -- 0.0.0.0/0 0.0.0.0/0 multiport dports 587,465,25
fail2ban-pureftpd tcp -- 0.0.0.0/0 0.0.0.0/0 tcp dpt:21
fail2ban-dropbear tcp -- 0.0.0.0/0 0.0.0.0/0 multiport dports 22
fail2ban-ssh-ddos tcp -- 0.0.0.0/0 0.0.0.0/0 multiport dports 22
fail2ban-pam all -- 0.0.0.0/0 0.0.0.0/0
Chain fail2ban-BadBots (1 references)
Chain fail2ban-SSH (1 references)
Chain fail2ban-apache (1 references)
Chain fail2ban-apache-modsecurity (1 references)
Chain fail2ban-apache-multiport (1 references)
Chain fail2ban-apache-nohome (1 references)
Chain fail2ban-apache-noscript (1 references)
Chain fail2ban-apache-overflows (1 references)
Chain fail2ban-dovecot (1 references)
Chain fail2ban-dropbear (1 references)
Chain fail2ban-imscp (1 references)
Chain fail2ban-ip-blacklist (1 references)
Chain fail2ban-mysqld-auth (1 references)
Chain fail2ban-nginx-http-auth (1 references)
Chain fail2ban-pam (1 references)
Chain fail2ban-postfix (1 references)
Chain fail2ban-proftpd (1 references)
Chain fail2ban-pureftpd (1 references)
Chain fail2ban-rainloop (1 references)
Chain fail2ban-roundcube (1 references)
Chain fail2ban-sasl (2 references)
Chain fail2ban-sendmail-auth (2 references)
Chain fail2ban-ssh (1 references)
Chain fail2ban-ssh-ddos (1 references)
Chain fail2ban-thp-ssh (1 references)
Chain fail2ban-xinetd-fail (0 references)
Chain fail2ban-xinetd-fail-log (0 references)
LOG all -- 0.0.0.0/0 0.0.0.0/0 limit: avg 6/min burst 2 LOG flags 0 level 4 prefix "fail2ban-xinetd-fail:DROP "
Megnéztem már az Debian GNU/Linux 8.3 (jessie) alap csomagját, legfrissebbet 0.9-es verziót és most a Fail2Ban v0.8.14 fut, de egyik sem talált soha semmit. Amit tapasztalok, hogy a log elemzések nem futnak, le valamiért, nem elemzi a logokat megfelelően a Fail2ban.
Előre is köszönöm a segítségeteket és bízok benne, hogy rá tudok jönni a "hiba" okára, illetve kíváncsi lennék, hogy másnál mi a helyzet, mert nem csak egy szerveren van fent, hanem Ubuntu 14.04és ott is ugyan ez a helyzet. Így lehet más is hamis biztonság érzetben van....
Kalmi