Shulou(Shulou.com)06/01 Report--

1. Query whether sudo and syslog programs are installed in the system.

[root@shangke ~] # rpm-qa | egrep "sudo | syslog" rsyslog-5.8.10-10.el6_6.x86_64sudo-1.8.6p3-19.el6.x86_64 if not installed, install it with yum, yum install-y sudo syslog

2. Configuration / etc/sudoers

Add configuration "Defaults logfile=/var/log/sudo.log" to / etc/sudoers

[root@shangke ~] # echo "Defaults logfile=/var/log/sudo.log" > > / etc/sudoers [root@shangke ~] # tail-1 / etc/sudoers # # check whether the operation is successful Defaults logfile=/var/log/sudo.log [root@shangke ~] # visudo-c # check sudoers file syntax / etc/sudoers: parsed OK

3. Configure Syslog

Add configuration local2.debug to / etc/syslog.conf (in Centos5.8)

Add configuration local2.debug to / etc/rsyslog.conf (in Centos6.4)

[root@shangke ~] # echo "local2.debug / var/log/sudo.log" > > / etc/rsyslog.conf [root@shangke ~] # tail-1 / etc/rsyslog.conf # # check the configuration local2.debug / var/log/sudo.log

4. Restart the syslog or rsyslog kernel logger

[root@shangke ~] # / etc/init.d/rsyslog restart Shutting down system logger: [OK] Starting system logger: [OK]

5. Permission to view log directory

[root@shangke ~] # ll / var/log/sudo.log-rw- 1 root root 1148 Jan 31 16:05 / var/log/sudo.log

6. Test the sudo log audit configuration results

[root@shangke ~] # whoamiroot [root@shangke ~] # pwd/root [root@shangke ~] # useradd mzq [root@shangke ~] # vi / etc/sudoersmzq ALL= (ALL) ALL [root@shangke] # su-mzq [mzq@shangke ~] $sudo-lMatching Defaults entries for mzq on this host: requiretty,! visiblepw, always_set_home, env_reset, env_keep= "COLORS DISPLAY HOSTNAME HISTSIZE INPUTRC KDEDIR LS_COLORS", env_keep+= "MAIL PS1 PS2 QTDIR USERNAME LANG LC_ADDRESS LC_CTYPE" Env_keep+= "LC_COLLATE LC_IDENTIFICATION LC_MEASUREMENT LC_MESSAGES", env_keep+= "LC_MONETARY LC_NAME LC_NUMERIC LC_PAPER LC_TELEPHONE", env_keep+= "LC_TIME LC_ALL LANGUAGE LINGUAS _ XKB_CHARSET XAUTHORITY", secure_path=/sbin\: / bin\: / usr/sbin\: / usr/bin, logfile=/var/log/sudo.logUser mzq may run the following commands on this host: (ALL) NOPASSWD: / bin/su, (ALL) / usr/bin/sudo (ALL) ALL [mzq@shangke ~] $su-Password: [root@shangke ~] # cat / var/log/sudo.log Jan 31 16:05:27: mzq: TTY=pts/0 PWD=/home/mzq; USER=root; COMMAND=/bin/cat / var/log/sudo.logJan 31 16:24:11: mzq: TTY=pts/0; PWD=/home/mzq; USER=root; COMMAND=listJan 31 16:25:09: mzq: TTY=pts/0; PWD=/home/mzq; USER=root; COMMAND=/bin/cat / var/log/sudo.log

7. Record the data of logged-in users

The / var/log/useraudit.log file records when the user was logged in, the source IP, and what commands were run on the system.

[root@shangke ~] # vim / etc/profile adds the following at the end: export HISTORY_FILE=/var/log/useraudit.logexport PROMPT_COMMAND=' {h = `history 1`; w = `who am i`; echo-e $(date "+% Y-%m-%d% H:%M:%S")-- $w-- $h } > > $HISTORY_FILE' then execute the command: [root@shangke ~] # touch / var/log/useraudit.log [root@shangke ~] # chmod 777 / var/log/useraudit.log [root@shangke ~] # chattr + a / var/log/useraudit.log [root@shangke ~] # cat / var/log/useraudit.log 2016-01-31 16:30:16-root pts/0 2016-01-31 16:21 (10.0.0.1)-15 su- 2016-01-31 16:30:18-root pts/0 2016-01-31 16:21 (10.0.0.1)-16 ls2016-01-31 16:30:22-root pts/0 2016-01-31 16:21 (10.0.0.1)-17 sudo ls2016-01-31 16:30:34-root pts/0 2016-01-31 16:21 (10.0.0.1)-18 cat / Var/log/sudo.log2016-01-31 16:30:46-root pts/0 2016-01-31 16:21 (10.0.0.1)-19 sudo cat / var/log/so2016-01-31 16:30:50-root pts/0 2016-01-31 16:21 (10.0.0.1)-20 sudo cat / var/log/sudo.log2016-01-31 16:31:09-root pts/0 2016-01 -31 16:21 (10.0.0.1)-- 21 rm-f oldboy12016-01-31 16:31:12-root pts/0 2016-01-31 16:21 (10.0.0.1)-22 sudo cat / var/log/sudo.log2016-01-31 16:32:04-root pts/0 2016-01-31 16:21 (10.0.0.1)-- 23 sodu cat / var/log/useraudit.log2016- 01-31 16:32:41-root pts/0 2016-01-31 16:21 (10.0.0.1)-24 cd / var/log/2016-01-31 16:32:43-root pts/0 2016-01-31 16:21 (10.0.0.1)-25 ls2016-01-31 16:33:05-root pts/0 2016-01-31 16:21 (10.0.0.1)-- 25 ls2016-01-31 16:33:08-root pts/0 2016-01-31 16:21 (10.0.0.1)-26 cd2016-01-31 16:33:10-root pts/0 2016-01-31 16:21 (10.0.0.1)-27 ls2016-01-31 16:33:18-root pts/0 2016-01-31 16:21 (10.0.0.1)-28 rm- F oldboy22016-01-31 16:33:23-root pts/0 2016-01-31 16:21 (10.0.0.1)-- 141su-mzq2016-01-31 16:33:40-root pts/0 2016-01-31 16:21 (10.0.0.1)-- 142cat / var/log/sudo.log2016-01-31 16:33:54-root pts/0 2016-01-31 16:21 (10.0.0) .1)-143FN / var/log/sudo.log | grep rm2016-01-31 16:34:01-root pts/0 2016-01-31 16:21 (10.0.0.1)-144cat / var/log/sudo.log | grep rm-f 2016-01-31 16:34:10-root pts/0 2016-01-31 16:21 (10.0.0.1)-- 145cat / var/log/sudo.log | grep "rm-f"

8. Centralized log management

1) rsync+inotify or scheduled task + rsync, push to the log management server, IP_date.sudo.log

2) syslog service to handle

[root@shangke ~] # echo "IP logserver" > / etc/hosts# log server address [root@shangke ~] # echo "* .info @ logserver" > > / etc/syslog.conf

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