Linux安全加固

[root@anonymous ~]# ls -ld /etc/passwd /bootdr-xr-xr-x. 5 root root 4096 2月   2 08:49 /boot-rw-r--r--  1 root root 1240 1月  27 08:18 /etc/passwd

-rw-r--r--：权限位 1：硬链接数root：属主root：属组1240：文件大小1月  27 08:18：最后修改时间/etc/passwd：文件/目录名称

[root@anonymous ~]# umask 027[root@anonymous ~]# touch test2[root@anonymous ~]# ls -l test2-rw-r----- 1 root root 0 2月   2 09:24 test2[root@anonymous ~]# mkdir test10[root@anonymous ~]# ls -ld test10drwxr-x--- 2 root root 6 2月   2 09:24 test10

[root@anonymous ~]# cat /etc/rsyslog.conf# rsyslog configuration file# For more information see /usr/share/doc/rsyslog-*/rsyslog_conf.html# or latest version online at http://www.rsyslog.com/doc/rsyslog_conf.html# If you experience problems, see http://www.rsyslog.com/doc/troubleshoot.html#### MODULES ####module(load="imuxsock"    # provides support for local system logging (e.g. via logger command)       SysSock.Use="off") # Turn off message reception via local log socket;                          # local messages are retrieved through imjournal now.module(load="imjournal"             # provides access to the systemd journal       UsePid="system" # PID nummber is retrieved as the ID of the process the journal entry originates from       StateFile="imjournal.state") # File to store the position in the journal#module(load="imklog") # reads kernel messages (the same are read from journald)#module(load="immark") # provides --MARK-- message capability# Provides UDP syslog reception# for parameters see http://www.rsyslog.com/doc/imudp.html#module(load="imudp") # needs to be done just once#input(type="imudp" port="514")# Provides TCP syslog reception# for parameters see http://www.rsyslog.com/doc/imtcp.html#module(load="imtcp") # needs to be done just once#input(type="imtcp" port="514")#### GLOBAL DIRECTIVES ##### Where to place auxiliary filesglobal(workDirectory="/var/lib/rsyslog")# Use default timestamp formatmodule(load="builtin:omfile" Template="RSYSLOG_TraditionalFileFormat")# Include all config files in /etc/rsyslog.d/include(file="/etc/rsyslog.d/*.conf" mode="optional")#### RULES ##### Log all kernel messages to the console.# Logging much else clutters up the screen.#kern.*                                                 /dev/console# Log anything (except mail) of level info or higher.# Don't log private authentication messages!*.info;mail.none;authpriv.none;cron.none                /var/log/messages# The authpriv file has restricted access.authpriv.*                                              /var/log/secure# Log all the mail messages in one place.mail.*                                                  -/var/log/maillog# Log cron stuffcron.*                                                  /var/log/cron# Everybody gets emergency messages*.emerg                                                 :omusrmsg:*# Save news errors of level crit and higher in a special file.uucp,news.crit                                          /var/log/spooler# Save boot messages also to boot.loglocal7.*                                                /var/log/boot.log# ### sample forwarding rule ####action(type="omfwd"# An on-disk queue is created for this action. If the remote host is# down, messages are spooled to disk and sent when it is up again.#queue.filename="fwdRule1"       # unique name prefix for spool files#queue.maxdiskspace="1g"         # 1gb space limit (use as much as possible)#queue.saveonshutdown="on"       # save messages to disk on shutdown#queue.type="LinkedList"         # run asynchronously#action.resumeRetryCount="-1"    # infinite retries if host is down# Remote Logging (we use TCP for reliable delivery)# remote_host is: name/ip, e.g. 192.168.0.1, port optional e.g. 10514#Target="remote_host" Port="XXX" Protocol="tcp")