Last active
December 26, 2020 10:35
-
-
Save Kusumoto/c04ad7aeb032d4f40fcea2751ccdbc78 to your computer and use it in GitHub Desktop.
Script for restore OpenSSH default configuration for Amazon Lightsail (Ubuntu)
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
#!/bin/sh | |
sshd_config=`cat <<EOF | |
# $OpenBSD: sshd_config,v 1.101 2017/03/14 07:19:07 djm Exp $ | |
# This is the sshd server system-wide configuration file. See | |
# sshd_config(5) for more information. | |
# This sshd was compiled with PATH=/usr/bin:/bin:/usr/sbin:/sbin | |
# The strategy used for options in the default sshd_config shipped with | |
# OpenSSH is to specify options with their default value where | |
# possible, but leave them commented. Uncommented options override the | |
# default value. | |
#Port 22 | |
#AddressFamily any | |
#ListenAddress 0.0.0.0 | |
#ListenAddress :: | |
#HostKey /etc/ssh/ssh_host_rsa_key | |
#HostKey /etc/ssh/ssh_host_ecdsa_key | |
#HostKey /etc/ssh/ssh_host_ed25519_key | |
# Ciphers and keying | |
#RekeyLimit default none | |
# Logging | |
#SyslogFacility AUTH | |
#LogLevel INFO | |
# Authentication: | |
#LoginGraceTime 2m | |
#PermitRootLogin prohibit-password | |
#StrictModes yes | |
#MaxAuthTries 6 | |
#MaxSessions 10 | |
#PubkeyAuthentication yes | |
# Expect .ssh/authorized_keys2 to be disregarded by default in future. | |
#AuthorizedKeysFile .ssh/authorized_keys .ssh/authorized_keys2 | |
#AuthorizedPrincipalsFile none | |
#AuthorizedKeysCommand none | |
#AuthorizedKeysCommandUser nobody | |
# For this to work you will also need host keys in /etc/ssh/ssh_known_hosts | |
#HostbasedAuthentication no | |
# Change to yes if you don't trust ~/.ssh/known_hosts for | |
# HostbasedAuthentication | |
#IgnoreUserKnownHosts no | |
# Don't read the user's ~/.rhosts and ~/.shosts files | |
#IgnoreRhosts yes | |
# To disable tunneled clear text passwords, change to no here! | |
PasswordAuthentication no | |
#PermitEmptyPasswords no | |
# Change to yes to enable challenge-response passwords (beware issues with | |
# some PAM modules and threads) | |
ChallengeResponseAuthentication no | |
# Kerberos options | |
#KerberosAuthentication no | |
#KerberosOrLocalPasswd yes | |
#KerberosTicketCleanup yes | |
#KerberosGetAFSToken no | |
# GSSAPI options | |
#GSSAPIAuthentication no | |
#GSSAPICleanupCredentials yes | |
#GSSAPIStrictAcceptorCheck yes | |
#GSSAPIKeyExchange no | |
# Set this to 'yes' to enable PAM authentication, account processing, | |
# and session processing. If this is enabled, PAM authentication will | |
# be allowed through the ChallengeResponseAuthentication and | |
# PasswordAuthentication. Depending on your PAM configuration, | |
# PAM authentication via ChallengeResponseAuthentication may bypass | |
# the setting of "PermitRootLogin without-password". | |
# If you just want the PAM account and session checks to run without | |
# PAM authentication, then enable this but set PasswordAuthentication | |
# and ChallengeResponseAuthentication to 'no'. | |
UsePAM yes | |
#AllowAgentForwarding yes | |
#AllowTcpForwarding yes | |
#GatewayPorts no | |
X11Forwarding yes | |
#X11DisplayOffset 10 | |
#X11UseLocalhost yes | |
#PermitTTY yes | |
PrintMotd no | |
#PrintLastLog yes | |
#TCPKeepAlive yes | |
#UseLogin no | |
#PermitUserEnvironment no | |
#Compression delayed | |
#ClientAliveInterval 0 | |
#ClientAliveCountMax 3 | |
#UseDNS no | |
#PidFile /var/run/sshd.pid | |
#MaxStartups 10:30:100 | |
#PermitTunnel no | |
#ChrootDirectory none | |
#VersionAddendum none | |
# no default banner path | |
#Banner none | |
# Allow client to pass locale environment variables | |
AcceptEnv LANG LC_* | |
# override default of no subsystems | |
Subsystem sftp /usr/lib/openssh/sftp-server | |
# Example of overriding settings on a per-user basis | |
#Match User anoncvs | |
# X11Forwarding no | |
# AllowTcpForwarding no | |
# PermitTTY no | |
# ForceCommand cvs server | |
TrustedUserCAKeys /etc/ssh/lightsail_instance_ca.pub | |
EOF | |
` | |
pam_sshd_config =`cat <<EOF | |
# PAM configuration for the Secure Shell service | |
# Standard Un*x authentication. | |
@include common-auth | |
# Disallow non-root logins when /etc/nologin exists. | |
account required pam_nologin.so | |
# Uncomment and edit /etc/security/access.conf if you need to set complex | |
# access limits that are hard to express in sshd_config. | |
# account required pam_access.so | |
# Standard Un*x authorization. | |
@include common-account | |
# SELinux needs to be the first session rule. This ensures that any | |
# lingering context has been cleared. Without this it is possible that a | |
# module could execute code in the wrong domain. | |
session [success=ok ignore=ignore module_unknown=ignore default=bad] pam_selinux.so close | |
# Set the loginuid process attribute. | |
session required pam_loginuid.so | |
# Create a new session keyring. | |
session optional pam_keyinit.so force revoke | |
# Standard Un*x session setup and teardown. | |
@include common-session | |
# Print the message of the day upon successful login. | |
# This includes a dynamically generated part from /run/motd.dynamic | |
# and a static (admin-editable) part from /etc/motd. | |
session optional pam_motd.so motd=/run/motd.dynamic | |
session optional pam_motd.so noupdate | |
# Print the status of the user's mailbox upon successful login. | |
session optional pam_mail.so standard noenv # [1] | |
# Set up user limits from /etc/security/limits.conf. | |
session required pam_limits.so | |
# Read environment variables from /etc/environment and | |
# /etc/security/pam_env.conf. | |
session required pam_env.so # [1] | |
# In Debian 4.0 (etch), locale-related environment variables were moved to | |
# /etc/default/locale, so read that as well. | |
session required pam_env.so user_readenv=1 envfile=/etc/default/locale | |
# SELinux needs to intervene at login time to ensure that the process starts | |
# in the proper default security context. Only sessions which are intended | |
# to run in the user's context should be run after this. | |
session [success=ok ignore=ignore module_unknown=ignore default=bad] pam_selinux.so open | |
# Standard Un*x password updating. | |
@include common-password | |
EOF | |
` | |
echo "$sshd_config" > /etc/ssh/sshd_config | |
echo "$pam_sshd_config" > /etc/pam.d/sshd | |
service sshd restart |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment