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LinuxЧÀÍÆ÷ÊÇÍøÂç¹¥»÷µÄÄ¿µÄ£¬Òò´Ë±£»¤Ð§ÀÍÆ÷Çå¾²ÖÁ¹ØÖ÷Òª¡£Í¨¹ýʹÓÃÏÂÁîÐй¤¾ß¿ÉÒÔÓÐÓõØÌá¸ßЧÀÍÆ÷µÄÇå¾²ÐÔ¡£±¾ÎĽ«ÏÈÈÝһЩ³£¼ûµÄÏÂÁîÐй¤¾ß£¬Ê¹ÓÃËüÃǾÙÐÐЧÀÍÆ÷µÄÇå¾²·ÀÓù¡£

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·À»ðǽÊDZ£»¤Ð§ÀÍÆ÷ÃâÊÜÍøÂç¹¥»÷µÄÖ÷Òª×é³É²¿·Ö¡£ÔÚLinuxЧÀÍÆ÷ÉÏ£¬¿ÉÒÔʹÓÃiptablesÏÂÁî¾ÙÐзÀ»ðǽµÄÉèÖá£ÏÂÃæÊÇÒ»¸ö¼òÆÓµÄʾÀý£¬ÑÝʾÔõÑùÉèÖ÷À»ðǽ¹æÔò£¬Ö»ÔÊÐíÌض¨IPµØµãµÄÖ÷ʱ»ú¼ûSSHЧÀÍ£º

# Çå¿Õ¹æÔòÁ´
iptables -F

# ÉèÖÃĬÈÏÕ½ÂÔ
iptables -P INPUT DROP
iptables -P FORWARD DROP
iptables -P OUTPUT ACCEPT

# ÔÊÐí»Ø»·½Ó¿Ú
iptables -A INPUT -i lo -j ACCEPT

# ÔÊÐíÌض¨IPµØµã»á¼ûSSHЧÀÍ
iptables -A INPUT -p tcp --dport 22 -s 192.168.1.100 -j ACCEPT
iptables -A INPUT -p tcp --dport 22 -j DROP

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ÈëÇÖ¼ì²â¿ÉÒÔ×ÊÖúʵʱ·¢Ã÷²¢×èֹDZÔڵĶñÒâÔ˶¯¡£SnortÊÇÒ»¸ö³£ÓõÄÈëÇÖ¼ì²âϵͳ£¬¿ÉÒÔͨ¹ýÏÂÁîÐоÙÐÐÉèÖúͼà¿Ø¡£ÒÔÏÂÊÇÒ»¸ö¼òÆÓµÄʾÀý£¬ÑÝʾÔõÑù×°ÖúÍʹÓÃSnort£º

# ×°ÖÃSnort
sudo apt-get install snort

# ±à¼­ÉèÖÃÎļþ
sudo vim /etc/snort/snort.conf

# Æô¶¯Snort
sudo snort -i eth0 -c /etc/snort/snort.conf -l /var/log/snort

# ¼à¿ØSnortÈÕÖ¾
tail -f /var/log/snort/alert

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ÈÕÖ¾ÆÊÎöÊÇÏàʶЧÀÍÆ÷Ô˶¯²¢¼ì²âDZÔÚÇ徲Σº¦µÄÖ÷ÒªÊֶΡ£ÔÚLinuxЧÀÍÆ÷ÉÏ£¬¿ÉÒÔʹÓÃlogwatchÏÂÁî¶ÔÈÕÖ¾¾ÙÐÐÆÊÎöºÍ±¨¸æ¡£ÒÔÏÂÊÇÒ»¸ö¼òÆÓµÄʾÀý£¬ÑÝʾÔõÑùÉèÖúÍʹÓÃlogwatch£º

# ×°ÖÃlogwatch
sudo apt-get install logwatch

# ÉèÖÃÓʼþ·¢ËÍ
sudo vim /etc/cron.daily/00logwatch
ÉèÖÃÓʼþµØµã:
$MailFrom = 'logwatch@example.com';
$MailTo = 'your-email@example.com';

# ÔËÐÐlogwatch
sudo /usr/sbin/logwatch --output mail --format html --detail high

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