CIS Ubuntu 22.04 Level 1 Server Benchmark

[org/gnome/login-screen]
disable-user-list=true

/org/gnome/login-screen/disable-user-list

[xdmcp]
Enable=false

[org/gnome/desktop/media-handling]
automount=false

/org/gnome/desktop/media-handling/automount

[org/gnome/desktop/media-handling]
automount-open=false

/org/gnome/desktop/media-handling/automount-open

[org/gnome/desktop/media-handling]
autorun-never=true

/org/gnome/desktop/media-handling/autorun-never

[org/gnome/desktop/screensaver]
lock-delay=uint32 

[org/gnome/desktop/screensaver]
lock-enabled=true

/org/gnome/desktop/screensaver/lock-enabled

[org/gnome/login-screen]
banner-message-enable=true

/org/gnome/login-screen/banner-message-enable

[org/gnome/login-screen]
banner-message-text='APPROVED_BANNER'

password    requisite     pam_pwquality.so try_first_pass local_users_only retry=3 authtok_type=

difok = 4
minlen = 14
dcredit = -1
ucredit = -1
lcredit = -1
ocredit = -1
maxrepeat = 3

ENCRYPT_METHOD 

INACTIVE=

$ sudo getent passwd | awk -F: '{ print $1}' | uniq -d

PASS_MAX_DAYS 

PASS_MIN_DAYS 

$ sudo chage -M  USER

$ sudo chage -m 1 USER

PASS_WARN_AGE 

$ sudo awk -F: '!$2 {print $1}' /etc/shadow

$ sudo passwd [username]

$ sudo passwd -l [username]

$ sudo usermod -s /sbin/nologin account

auth required pam_wheel.so use_uid group=

# ls -ld DIR

PATH=:/bin
PATH=/bin:
PATH=/bin::/sbin

umask 

UMASK 

umask 

:INPUT DROP [0:0]

$ sudo service ip6tables reload

:INPUT DROP [0:0]

$ sudo sysctl -w net.ipv6.conf.all.accept_ra=0

net.ipv6.conf.all.accept_ra = 0

$ sudo sysctl -w net.ipv6.conf.all.accept_redirects=0

net.ipv6.conf.all.accept_redirects = 0

$ sudo sysctl -w net.ipv6.conf.all.accept_source_route=0

net.ipv6.conf.all.accept_source_route = 0

$ sudo sysctl -w net.ipv6.conf.all.forwarding=0

net.ipv6.conf.all.forwarding = 0

$ sudo sysctl -w net.ipv6.conf.default.accept_ra=0

net.ipv6.conf.default.accept_ra = 0

$ sudo sysctl -w net.ipv6.conf.default.accept_redirects=0

net.ipv6.conf.default.accept_redirects = 0

$ sudo sysctl -w net.ipv6.conf.default.accept_source_route=0

net.ipv6.conf.default.accept_source_route = 0

$ sudo sysctl -w net.ipv4.conf.all.accept_redirects=0

net.ipv4.conf.all.accept_redirects = 0

$ sudo sysctl -w net.ipv4.conf.all.accept_source_route=0

net.ipv4.conf.all.accept_source_route = 0

$ sudo sysctl -w net.ipv4.conf.all.log_martians=1

net.ipv4.conf.all.log_martians = 1

$ sudo sysctl -w net.ipv4.conf.all.rp_filter=1

net.ipv4.conf.all.rp_filter = 1

$ sudo sysctl -w net.ipv4.conf.all.secure_redirects=0

net.ipv4.conf.all.secure_redirects = 0

$ sudo sysctl -w net.ipv4.conf.default.accept_redirects=0

net.ipv4.conf.default.accept_redirects = 0

$ sudo sysctl -w net.ipv4.conf.default.accept_source_route=0

net.ipv4.conf.default.accept_source_route = 0

$ sudo sysctl -w net.ipv4.conf.default.log_martians=1

net.ipv4.conf.default.log_martians = 1

$ sudo sysctl -w net.ipv4.conf.default.rp_filter=1

net.ipv4.conf.default.rp_filter = 1

$ sudo sysctl -w net.ipv4.conf.default.secure_redirects=0

net.ipv4.conf.default.secure_redirects = 0

$ sudo sysctl -w net.ipv4.icmp_echo_ignore_broadcasts=1

net.ipv4.icmp_echo_ignore_broadcasts = 1

$ sudo sysctl -w net.ipv4.icmp_ignore_bogus_error_responses=1

net.ipv4.icmp_ignore_bogus_error_responses = 1

$ sudo sysctl -w net.ipv4.tcp_syncookies=1

net.ipv4.tcp_syncookies = 1

$ sudo sysctl -w net.ipv4.conf.all.send_redirects=0

net.ipv4.conf.all.send_redirects = 0

$ sudo sysctl -w net.ipv4.conf.default.send_redirects=0

net.ipv4.conf.default.send_redirects = 0

$ sudo sysctl -w net.ipv4.ip_forward=0

net.ipv4.ip_forward = 0

$ sudo nmcli radio all off

$ sudo chgrp root /etc/group-

$ sudo chgrp shadow /etc/gshadow-

$ sudo chgrp root /etc/passwd-

$ sudo chgrp shadow /etc/shadow-

$ sudo chgrp root /etc/group

$ sudo chgrp shadow /etc/gshadow

$ sudo chgrp root /etc/passwd

$ sudo chgrp shadow /etc/shadow

$ sudo chown root /etc/group- 

$ sudo chown root /etc/gshadow- 

$ sudo chown root /etc/passwd- 

$ sudo chown root /etc/shadow- 

$ sudo chown root /etc/group 

$ sudo chown root /etc/gshadow 

$ sudo chown root /etc/passwd 

$ sudo chown root /etc/shadow 

$ sudo chmod 0644 /etc/group-

$ sudo chmod 0640 /etc/gshadow-

$ sudo chmod 0644 /etc/passwd-

$ sudo chmod 0640 /etc/shadow-

$ sudo chmod 0644 /etc/group

$ sudo chmod 0640 /etc/gshadow

$ sudo chmod 0644 /etc/passwd

$ sudo chmod 0640 /etc/shadow

$ stat -c "%n %G" /sbin/auditctl /sbin/aureport /sbin/ausearch /sbin/autrace /sbin/auditd /sbin/audispd /sbin/augenrules

/sbin/auditctl root
/sbin/aureport root
/sbin/ausearch root
/sbin/autrace root
/sbin/auditd root
/sbin/audispd root
/sbin/augenrules root

$ stat -c "%n %U" /sbin/auditctl /sbin/aureport /sbin/ausearch /sbin/autrace /sbin/auditd /sbin/audispd /sbin/augenrules

/sbin/auditctl root
/sbin/aureport root
/sbin/ausearch root
/sbin/autrace root
/sbin/auditd root
/sbin/audispd root
/sbin/augenrules root

$ stat -c "%n %a" /sbin/auditctl /sbin/aureport /sbin/ausearch /sbin/autrace /sbin/auditd /sbin/audispd /sbin/augenrules

/sbin/auditctl 755
/sbin/aureport 755
/sbin/ausearch 755
/sbin/autrace 755
/sbin/auditd 755
/sbin/audispd 755
/sbin/augenrules 755

*     hard   core    0

$ sudo sysctl -w fs.suid_dumpable=0

fs.suid_dumpable = 0

$ sudo sysctl -w kernel.randomize_va_space=2

kernel.randomize_va_space = 2

$ apt-get remove rpcbind