{"id":94,"date":"2007-12-05T15:30:20","date_gmt":"2007-12-05T06:30:20","guid":{"rendered":"http:\/\/www.key-p.com\/blog\/staff\/archives\/94"},"modified":"2010-03-25T13:44:20","modified_gmt":"2010-03-25T04:44:20","slug":"hostsdeny%e3%81%a7%e3%82%a2%e3%82%af%e3%82%bb%e3%82%b9%e5%88%b6%e9%99%90","status":"publish","type":"post","link":"https:\/\/www.key-p.com\/blog\/staff\/archives\/94","title":{"rendered":"hosts.deny\u3067\u30a2\u30af\u30bb\u30b9\u5236\u9650"},"content":{"rendered":"

\n\u30c8\u30de\u30c8\uff20\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u4e91\u3005\u62c5\u5f53\u3067\u3059\u3002
\n
\n\u30b5\u30fc\u30d0\u3092\u904b\u7528\u3057\u3066\u3044\u308b\u3068\u3001\u653b\u6483\u3084\u3001\u4e0d\u6b63\u30a2\u30af\u30bb\u30b9\u3092\u53d7\u3051\u308b\u4e8b\u306f\u3088\u304f\u6709\u308a\u307e\u3059\u3002
\n\u4eca\u56de\u306f\u3001SSH\u3078\u306e\u9023\u7d9a\u7684\u306a\u653b\u6483\u3092\u3001\u30b5\u30fc\u30d0\u3067\u5224\u65ad\u3057\u3001\u81ea\u52d5\u3067\u30a2\u30af\u30bb\u30b9\u3092\u62d2\u5426\u3059\u308b\u30b9\u30af\u30ea\u30d7\u30c8\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002
\n
\n\u653b\u6483\u306e\u5224\u65ad\u57fa\u6e96\u306f\u3001\u5b58\u5728\u3057\u306a\u3044\u30e6\u30fc\u30b6\u3067\u306e\u30a2\u30af\u30bb\u30b9\u3068\u3001\u5b58\u5728\u3057\u306a\u3044\u30e6\u30fc\u30b6\u3067\u3001\u30d1\u30b9\u30ef\u30fc\u30c9\u9593\u9055\u3044\u306e\u63a5\u7d9a\u3001\u5b58\u5728\u3059\u308b\u30e6\u30fc\u30b6\u3067\u3001\u30d1\u30b9\u30ef\u30fc\u30c9\u9593\u9055\u3044\u306e\u63a5\u7d9a\u306e3\u7a2e\u985e\u3067\u3059\u3002
\n
\n\u30b9\u30af\u30ea\u30d7\u30c8\u306e\u5185\u5bb9\u7684\u306b\u306f\u3001crontab\u3092\u4f7f\u7528\u3057\u3001\u4e00\u5b9a\u9593\u9694\u3067\u30ed\u30b0\u30d5\u30a1\u30a4\u30eb\u3092\u30c1\u30a7\u30c3\u30af\u3001\u6307\u5b9a\u56de\u6570\u4ee5\u4e0a\u306e\u653b\u6483\u3092\u691c\u77e5\u3059\u308b\u3068\u3001hosts.deny\u30d5\u30a1\u30a4\u30eb\u306b\u3066\u3001\u8a72\u5f53IP\u304b\u3089\u306eSSH\u63a5\u7d9a\u3092\u62d2\u5426\u3059\u308b\u3068\u8a00\u3046\u7269\u3067\u3059\u3002
\n
\n
\n\u6700\u65b0\u30d5\u30a1\u30a4\u30eb\u306f\u3001\u30b3\u30e1\u30f3\u30c8\u6b04\u306eURL\u304b\u3089\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u51fa\u6765\u307e\u3059\u3002
\n\u4ee5\u4e0b\u306e\u30b3\u30fc\u30c9\u3092\u3001\u30b3\u30d4\u30fc\uff06\u30da\u30fc\u30b9\u30c8\u3067\u4f7f\u7528\u3057\u306a\u3044\u3067\u4e0b\u3055\u3044\u3002
\n\u203b\u74b0\u5883\u306b\u3088\u308a\u3001\u4e0d\u7528\u306a\u30b3\u30fc\u30c9\u304c\u5165\u3063\u3066\u3057\u307e\u3046\u5834\u5408\u304c\u3042\u308a\u307e\u3059
\n
\nssh-check.sh
\n[code]
\n#!\/bin\/sh
\n
\n#------------------------------------------------------------------------------#
\n# [SSH] hosts.deny\u3067\u30a2\u30af\u30bb\u30b9\u5236\u9650
\n#------------------------------------------------------------------------------#
\n# Date :2008\/12\/09
\n# Version :1.0.1
\n# Copyright:KeyPoint,Inc.
\n# Author :tomato
\n#------------------------------------------------------------------------------#
\n
\n#------------------------------------------------------------------------------#
\n# \u74b0\u5883\u8a2d\u5b9a
\n#------------------------------------------------------------------------------#
\n# \u653b\u6483\u5224\u65ad\u56de\u6570\uff08\u30c7\u30d5\u30a9\u30eb\u30c810\u56de\u4ee5\u4e0a\u3067\u30a2\u30af\u30bb\u30b9\u3092\u62d2\u5426\uff09
\nNG=\"10\"
\n
\n# \u30ed\u30b0\u30d5\u30a1\u30a4\u30eb
\nLOG_PATH=\"\/var\/log\/secure\"\t\t# RedHat(CentOS)
\n#LOG_PATH=\"\/var\/log\/auth.log\"\t\t# Debian(Ubuntu)
\n#------------------------------------------------------------------------------#
\n
\n#------------------------------------------------------------------------------#
\n# \u30b9\u30af\u30ea\u30d7\u30c8\u672c\u4f53
\n#------------------------------------------------------------------------------#
\n#\u5b9f\u884c\u30e6\u30fc\u30b6\u306e\u78ba\u8a8d
\nUSER=`\/usr\/bin\/whoami`
\n[ $USER = \"root\" ] || {
\n\techo \"\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\"
\n\techo \"\/\/\/\/\/ Error! \/\/\/\/\/\"
\n\techo \"\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\"
\n\techo \"root\u6a29\u9650\u3067\u5b9f\u884c\u3057\u3066\u4e0b\u3055\u3044\u3002\"
\n\techo \"\u5b9f\u884c\u4f8b\uff1a# .\/ssh-check.sh\"
\n\techo \"\u5b9f\u884c\u4f8b\uff1a$ sudo .\/ssh-check.sh\"
\n\techo \"\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\"
\n\texit;
\n}
\n
\n# \u91cd\u8907\u8d77\u52d5\u306e\u9632\u6b62
\n[ -f \/tmp\/ssh-check ] &&; \/tmp\/ssh-check
\n
\n# \u653b\u6483\u306e\u3042\u3063\u305fIP\u30a2\u30c9\u30ec\u30b9(\u5b58\u5728\u3057\u306a\u3044\u30e6\u30fc\u30b6\u3067\u306e\u30a2\u30af\u30bb\u30b9\u3068\u3001\u5b58\u5728\u3057\u306a\u3044\u30e6\u30fc\u30b6\u3067\u3001
\n# \u30d1\u30b9\u30ef\u30fc\u30c9\u9593\u9055\u3044\u306e\u63a5\u7d9a\u3001\u5b58\u5728\u3059\u308b\u30e6\u30fc\u30b6\u3067\u3001\u30d1\u30b9\u30ef\u30fc\u30c9\u9593\u9055\u3044\u306e\u63a5\u7d9a\u3092\u691c\u51fa)
\nLIST=`grep \"Invalid user\" $LOG_PATH|awk '{print $10}'|sort|uniq ; grep \"Failed password for invalid user\" $LOG_PATH|awk '{print $13}'|sort|uniq ; grep \"Failed password for\" $LOG_PATH|grep -v \"invalid\"|awk '{print $11}'|sort|uniq`
\n
\nfor IP in $LIST
\ndo
\n # \u653b\u6483\u56de\u6570\u3092\u30ab\u30a6\u30f3\u30c8\u3059\u308b
\n COUNT1=`grep \"Invalid user\" $LOG_PATH|grep -w \"$IP\"|wc -l`
\n COUNT2=`grep \"Failed password for\" $LOG_PATH|grep -w \"$IP\"|wc -l`
\n COUNT=`expr $COUNT1 + $COUNT2`
\n
\n # \u65e2\u306b\u767b\u9332\u3055\u308c\u3066\u3044\u308b\u304b\u78ba\u8a8d
\n if test `grep -w \"$IP\" \/etc\/hosts.deny`
\n then
\n echo \"\u767b\u9332\u6e08\u307f\uff1a\"$IP
\n else
\n # \u653b\u6483\u56de\u6570\u306e\u30c1\u30a7\u30c3\u30af
\n if [ $COUNT -ge $NG ]
\n then
\n # \u56de\u6570\u30aa\u30fc\u30d0\u30fc\u3067\u3001hosts.deny\u306b\u8ffd\u8a18\u3059\u308b
\n echo \"\u56de\u6570\u30aa\u30fc\u30d0\u30fc\uff1a\"$COUNT \"\u56de [\"$IP\"]\"
\n echo \"sshd:\"$IP >> \/etc\/hosts.deny
\n fi
\n fi
\ndone
\n
\n# \u4e00\u6642\u30d5\u30a1\u30a4\u30eb\u306e\u524a\u9664
\nrm \/tmp\/ssh-check
\n#------------------------------------------------------------------------------#
\n[\/code]
\n
\n\u30b9\u30af\u30ea\u30d7\u30c8\u306e\u7de8\u96c6\u3068\u3001\u5b9f\u884c\u6a29\u9650\u306e\u4ed8\u52a0
\n

\n# vim ssh-check.sh\n# chmod +x ssh-check.sh\n<\/pre>\n\u203b\u300c\u74b0\u5883\u8a2d\u5b9a\u300d\u90e8\u5206\u306f\u3001\u74b0\u5883\u306b\u5408\u308f\u305b\u3066\u8a2d\u5b9a\u3057\u3066\u4e0b\u3055\u3044
\n
\n\u30b9\u30af\u30ea\u30d7\u30c8\u306e\u5b9f\u884c\u4f8b
\n
\n# .\/ssh-check.sh\n\u56de\u6570\u30aa\u30fc\u30d0\u30fc\uff1a100 \u56de [111.111.111.111]\n\u56de\u6570\u30aa\u30fc\u30d0\u30fc\uff1a200 \u56de [222.222.222.222]\n<\/pre>\n\u203b\u653b\u6483\u56de\u6570\u304c\u3001\u6307\u5b9a\u56de\u6570\u3092\u8d8a\u3048\u305f\u5834\u5408\u306b\u3001\u300chosts.deny\u300d\u30d5\u30a1\u30a4\u30eb\u306b\u3001\u30a2\u30af\u30bb\u30b9\u5236\u9650\u60c5\u5831\u304c\u8ffd\u8a18\u3055\u308c\u307e\u3059
\n
\ncrontab\u306e\u8a2d\u5b9a\u4f8b\uff085\u5206\u9593\u9694\u306e\u5834\u5408\uff09
\n
\n*\/5 * * * *     root    \/root\/bin\/ssh-check.sh > \/dev\/null 2>&1\n<\/pre>\n\u203b\u300c\/etc\/hosts.deny\u300d\u30d5\u30a1\u30a4\u30eb\u3092\u7de8\u96c6\u3059\u308b\u306e\u3067\u3001root\u6a29\u9650\u3067\u5b9f\u884c\u3057\u307e\u3059
\n
\n\u3053\u308c\u3067\u3001\u8a72\u5f53IP\u30a2\u30c9\u30ec\u30b9\u304b\u3089\u306e\u63a5\u7d9a\u306f\u62d2\u5426\u51fa\u6765\u307e\u3059\u3002
\nIPv6\u74b0\u5883\u306e\u5834\u5408\u306f\u3001\u7121\u52b9\u306b\u3057\u3066\u4e0b\u3055\u3044\u3002
\n<\/p>\n","protected":false},"excerpt":{"rendered":"
\u30c8\u30de\u30c8\uff20\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u4e91\u3005\u62c5\u5f53\u3067\u3059\u3002 \u30b5\u30fc\u30d0\u3092\u904b\u7528\u3057\u3066\u3044\u308b\u3068\u3001\u653b\u6483\u3084\u3001\u4e0d\u6b63\u30a2\u30af\u30bb\u30b9 … \u7d9a\u304d\u3092\u8aad\u3080 →<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[12],"tags":[],"jetpack-related-posts":[],"_links":{"self":[{"href":"https:\/\/www.key-p.com\/blog\/staff\/wp-json\/wp\/v2\/posts\/94"}],"collection":[{"href":"https:\/\/www.key-p.com\/blog\/staff\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.key-p.com\/blog\/staff\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.key-p.com\/blog\/staff\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.key-p.com\/blog\/staff\/wp-json\/wp\/v2\/comments?post=94"}],"version-history":[{"count":2,"href":"https:\/\/www.key-p.com\/blog\/staff\/wp-json\/wp\/v2\/posts\/94\/revisions"}],"predecessor-version":[{"id":196,"href":"https:\/\/www.key-p.com\/blog\/staff\/wp-json\/wp\/v2\/posts\/94\/revisions\/196"}],"wp:attachment":[{"href":"https:\/\/www.key-p.com\/blog\/staff\/wp-json\/wp\/v2\/media?parent=94"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.key-p.com\/blog\/staff\/wp-json\/wp\/v2\/categories?post=94"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.key-p.com\/blog\/staff\/wp-json\/wp\/v2\/tags?post=94"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}