说明：
Linux系统登录日志为/var/log/secure，一次登录会输出打印一下信息：
登录成功：
Jan 6 17:11:47 localhost sshd[3324]: Received disconnect from 172.16.0.13: 11: disconnected by user
Jan 6 17:11:47 localhost sshd[3324]: pam_unix(sshd:session): session closed for user root
Jan 6 17:11:48 localhost sshd[3358]: Address 172.16.0.13 maps to localhost, but this does not map back to the address - POSSIBLE BREAK-IN ATTEMPT!
Jan 6 17:11:51 localhost sshd[3358]: Accepted password for root from 172.16.0.13 port 38604 ssh2
Jan 6 17:11:51 localhost sshd[3358]: pam_unix(sshd:session): session opened for user root by (uid=0)
登录失败：
Jan 6 17:13:10 localhost sshd[3380]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=172.16.0.39 user=root
Jan 6 17:13:12 localhost sshd[3380]: Failed password for root from 172.16.0.39 port 58481 ssh2
以上信息中我们只用通过一下两条判断登录成功或失败
Jan 6 17:11:51 localhost sshd[3358]: Accepted password for root from 172.16.0.13 port 38604 ssh2
或者
Jan 6 17:13:12 localhost sshd[3380]: Failed password for root from 172.16.0.39 port 58481 ssh2
logstash配置
input {
file {
path => "/var/log/secure"
}
}
filter {
grok {
match => {
"message" => ".* sshd\[\d+\]: (?<status>\S+) .* (?<ClientIP>(?:\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3})?) .*"
}
overwrite => ["message"]
}
}
output {
if [ClientIP] =~ /\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}/ and ([status] == "Accepted" or [status] == "Failed") {
elasticsearch {
hosts => "172.16.11.199"
index => "logstash-%{+YYYY.MM.dd}"
}
}
}
配置解释：
- input插件使用file读取日志文件
- filter插件使用grok来匹配相应的日志行
- message中定义了两个Fields，分别匹配登录来源IP，和登录状态
- overwrite表示重写message行
- output插件指定将过滤出来的信息输出到哪个地方，这里输出到elasticsearch
- 一个条件判断，判断filter中定义的两个fields是否匹配，如果匹配则输出到elasticsearch中，如果不匹配则不操作
正则解释
Jan 6 17:11:51 localhost sshd[3358]: Accepted password for root from 172.16.0.13 port 38604 ssh2
ClinentIP:
.* 匹配 Jan 6 17:11:51 localhost 段
sshd\[\d+\]:sshd[3358]: 段，\d+匹配多个数字
-
(?<status>\S+)：
- (?<xxx>正则表达式)：定义一个xxx字段匹配后面正则表达式，类似{xxx:匹配的结果}，在上面output中的条件判断即可使用该字段来使用匹配到的结果
- \S+表示多个字符串，也就是匹配Accepted或Failed
-
(?<ClientIP>(?:\d{1,3}.\d{1,3}.\d{1,3}.\d{1,3})?)
- 先定义一个ClientIP字段
- (?:...)? 表示匹配一个ip但不保存供以后引用，如果(...)则以后可以使用$1来调用匹配到的值，最后一个?表示非贪婪匹配，尽可能少的匹配
kibana配置用户登录成功失败条形图
