fail2banÊÇÒ»¿îÃâ·ÑµÄϵͳÈÕÖ¾·ÖÎöϵͳ£¬Õâ¿îϵͳ»¹¿ÉÒÔ¶ÔÁ÷ÐеÄÍøÂç·þÎñÆ÷¿É¿ªÕ¹¸ü¿ìµÄ¼à¹Ü£¬²¢ÇÒÕ⿪չ¼à¹ÜµÄÓë´Ëͬʱ£¬Ö§³Öϵͳ¶ÔµÄÈÕÖ¾¿ªÕ¹¸ü¿ìµÄ²éѯ£¬¿É×ÔÐеÄ×÷Óÿͻ§Åä¶ÔÈÕÖ¾µÄ´íÎ󱨸æµÈ£¬°üº¬Á˶ÔÏà¶ÔÐÔÓ¦µÄµÄÆÁ±Îµô×ËÊÆ¿ªÕ¹ÊµÐС£

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1¡¢Ö§³ÖºÜ¶à·þÎñÏîÄ¿¡£Èçsshd,apache,qmail,proftpd,saslÕâЩ

2¡¢Ö§³Ö¶àÖÖ¶àÑù×ËÊÆ¡£Èçiptables,tcp-wrapper,shorewall(iptablesµÚÈý·½×¨Óù¤¾ß),mail notifications(µç×ÓÓʼþͨ¸æ)ÕâЩ¡£

3¡¢ÔÚlogpathÑ¡ÔñÏîÖÐÖ§³ÖʹÓÃͨÅä·û

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5¡¢±ØÐë°²Ñbpython,iptables,tcp-wrapper,shorewall,Gamin¡£¼ÙÈçÒªÏë·¢ËÍÓʼþ£¬ÄDZز»¿ÉÉÙ°²Ñbpostfix/sendmail

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//Ãâ·ÑÏÂÔØrpmforge (Àï±ßÓкܶàȫеÄrpm°ü)

# wget URL ´ËURLÇëʹÓÃÍØÕ¹ÔĶÁÎÄÕÂÖеÄÏêϸµØÖ·¸ü»»

//°²×°rpmforge

# rpm -ivh rpmforge-release-0.3.6-1.el5.rf.i386.rpm

//ÓÃyum°²×°fail2ban

# yum install fail2ban

°²Ñb½áÊøºó£¬fail2ban µÄÉ趨µµÔÚÕâ¶ù

# /etc/fail2ban

fail2ban.conf ÈÕÖ¾É趨Îı¾Îĵµ

jail.conf ×èÀ¹É趨Îı¾Îĵµ

/etc/fail2ban/filter.d ʵ¼Ê×èÀ¹ƒÈÈÝÉ趨Ŀ¼

ĬÈÏÉèÖÃfail2ban.confÀï±ß¾ÍÈý¸öÖ÷Òª²ÎÊý£¬²¢ÇÒ¶¼ÊÇÓÐ×¢½â¡£

-------------------------------

#ĬÈÏÉèÖÃÈÕÖ¾µÄµÈ¼¶

loglevel = 3

#ÈÕÖ¾µÄÄ¿µØ

logt*arget = /var/log/fail2ban.log

#socketµÄ²¿Î»

socket = /tmp/fail2ban.sock

-------------------------------

jail.confÅ䱸ÀïÊÇfail2banËù±£ÕϵÄÖ÷Òª·þÎñÏîÄ¿µÄÅ䱸£¬Õâ¶ùÒÔSSH¶øÑÔ¡£

ÔÚjail.confÀïÓÐÒ»¸ö[DEFAULT]¶Î£¬ÔÚÕâ¸ö¶ÎϵÄÖ÷Òª²ÎÊýÊÇÈ«¾ÖÖ÷Òª²ÎÊý£¬Äܹ»±»ÆäËû¶ÎËùÕڸǡ£

-------------------------------

#ºöÊÓIP,ÔÚÕâ¸öÃ÷ϸÀïµÄIP²»ÈÝÒ×±»ÆÁ±Î

ignoreip = 127.0.0.1 172.13.14.15

#ÆÁ±Îµô•r¼ä

bantime = 600

#·¢¾õ•r¼ä£¬ÔÚÕâ¶Îʱ¼äÄÚÔÙÊÔ³¬³öÒªÇóƵ´Î£¬»á¼¤»°fail2ban

findtime = 600

#ÊÔ×ÅƵ´Î

maxretry = 3

#ÈÕÖ¾¸Ä¶¯¼ìÑéÌåÖÆ

backend = auto

[ssh-iptables]

#¼¤»°

enabled = true

#filterµÄÃû³Æ£¬ÔÚfilter.dĿ¼ÏÂ

filter = sshd

#ËùÔËÓõŤ×÷ÖУ¬ÒÀÕÕÃû³Æ¿ÉÔÚaction.dĿ¼ÏÂÑ°ÕÒ

action = iptables[name=SSH, port=ssh, protocol=tcp]

mail-whois[name=SSH, dest=root]

#Ä¿µØÆÊÎöÈÕÖ¾

logpath = /var/log/secure

#ÕÚ¸ÇÈ«¾ÖÔÙÊÔƵ´Î

maxretry = 5

#ÕÚ¸ÇÈ«¾ÖÆÁ±Îµô•r¼ä

bantime = 3600

-------------------------------

¶Ôjail.conf¿ªÕ¹Ò»¶¨µÄ°²×°ºó£¬¾Í¿ÉÒÔÓ¦ÓÃfail2banÁË¡£

//ÔËÐÐfail2ban

# service fail2ban start

ÔËÐÐÒÔºó£¬Ö»ÐèºÏºõfilterËùÀí½âµÄÕýÔò±í´ïʽʽ±ê×¼µÄÈÕÖ¾Ïî·¢Éú£¬±ã»áʵÐжÔÓ¦µÄaction¡£