fail2ban and ssh config

etc/fail2ban/jail.conf

+# Fail2Ban configuration file.
+#
+# This file was composed for Debian systems from the original one
+# provided now under /usr/share/doc/fail2ban/examples/jail.conf
+# for additional examples.
+#
+# Comments: use '#' for comment lines and ';' for inline comments
+#
+# To avoid merges during upgrades DO NOT MODIFY THIS FILE
+# and rather provide your changes in /etc/fail2ban/jail.local
+#
+
+# The DEFAULT allows a global definition of the options. They can be overridden
+# in each jail afterwards.
+
+[DEFAULT]
+
+# "ignoreip" can be an IP address, a CIDR mask or a DNS host. Fail2ban will not
+# ban a host which matches an address in this list. Several addresses can be
+# defined using space separator.
+ignoreip = 127.0.0.1/8
+
+# External command that will take an tagged arguments to ignore, e.g. <ip>,
+# and return true if the IP is to be ignored. False otherwise.
+#
+# ignorecommand = /path/to/command <ip>
+ignorecommand =
+
+# "bantime" is the number of seconds that a host is banned.
+bantime  = 600
+
+# A host is banned if it has generated "maxretry" during the last "findtime"
+# seconds.
+findtime = 600
+maxretry = 5
+
+# "backend" specifies the backend used to get files modification.
+# Available options are "pyinotify", "gamin", "polling" and "auto".
+# This option can be overridden in each jail as well.
+#
+# pyinotify: requires pyinotify (a file alteration monitor) to be installed.
+#            If pyinotify is not installed, Fail2ban will use auto.
+# gamin:     requires Gamin (a file alteration monitor) to be installed.
+#            If Gamin is not installed, Fail2ban will use auto.
+# polling:   uses a polling algorithm which does not require external libraries.
+# auto:      will try to use the following backends, in order:
+#            pyinotify, gamin, polling.
+backend = auto
+
+# "usedns" specifies if jails should trust hostnames in logs,
+#   warn when reverse DNS lookups are performed, or ignore all hostnames in logs
+#
+# yes:   if a hostname is encountered, a reverse DNS lookup will be performed.
+# warn:  if a hostname is encountered, a reverse DNS lookup will be performed,
+#        but it will be logged as a warning.
+# no:    if a hostname is encountered, will not be used for banning,
+#        but it will be logged as info.
+usedns = warn
+
+#
+# Destination email address used solely for the interpolations in
+# jail.{conf,local} configuration files.
+destemail = root@localhost
+
+#
+# Name of the sender for mta actions
+sendername = Fail2Ban
+
+# Email address of the sender
+sender = fail2ban@localhost
+
+#
+# ACTIONS
+#
+
+# Default banning action (e.g. iptables, iptables-new,
+# iptables-multiport, shorewall, etc) It is used to define
+# action_* variables. Can be overridden globally or per
+# section within jail.local file
+banaction = iptables-multiport
+
+# email action. Since 0.8.1 upstream fail2ban uses sendmail
+# MTA for the mailing. Change mta configuration parameter to mail
+# if you want to revert to conventional 'mail'.
+mta = sendmail
+
+# Default protocol
+protocol = tcp
+
+# Specify chain where jumps would need to be added in iptables-* actions
+chain = INPUT
+
+#
+# Action shortcuts. To be used to define action parameter
+
+# The simplest action to take: ban only
+action_ = %(banaction)s[name=%(__name__)s, port="%(port)s", protocol="%(protocol)s", chain="%(chain)s"]
+
+# ban & send an e-mail with whois report to the destemail.
+action_mw = %(banaction)s[name=%(__name__)s, port="%(port)s", protocol="%(protocol)s", chain="%(chain)s"]
+              %(mta)s-whois[name=%(__name__)s, dest="%(destemail)s", protocol="%(protocol)s", chain="%(chain)s", sendername="%(sendername)s"]
+
+# ban & send an e-mail with whois report and relevant log lines
+# to the destemail.
+action_mwl = %(banaction)s[name=%(__name__)s, port="%(port)s", protocol="%(protocol)s", chain="%(chain)s"]
+               %(mta)s-whois-lines[name=%(__name__)s, dest="%(destemail)s", logpath=%(logpath)s, chain="%(chain)s", sendername="%(sendername)s"]
+
+# Choose default action.  To change, just override value of 'action' with the
+# interpolation to the chosen action shortcut (e.g.  action_mw, action_mwl, etc) in jail.local
+# globally (section [DEFAULT]) or per specific section
+action = %(action_)s
+
+#
+# JAILS
+#
+
+# Next jails corresponds to the standard configuration in Fail2ban 0.6 which
+# was shipped in Debian. Enable any defined here jail by including
+#
+# [SECTION_NAME]
+# enabled = true
+
+#
+# in /etc/fail2ban/jail.local.
+#
+# Optionally you may override any other parameter (e.g. banaction,
+# action, port, logpath, etc) in that section within jail.local
+
+[ssh]
+
+enabled  = true
+port     = ssh
+filter   = sshd
+logpath  = /var/log/auth.log
+maxretry = 6
+
+[dropbear]
+
+enabled  = false
+port     = ssh
+filter   = dropbear
+logpath  = /var/log/auth.log
+maxretry = 6
+
+# Generic filter for pam. Has to be used with action which bans all ports
+# such as iptables-allports, shorewall
+[pam-generic]
+
+enabled  = false
+# pam-generic filter can be customized to monitor specific subset of 'tty's
+filter   = pam-generic
+# port actually must be irrelevant but lets leave it all for some possible uses
+port     = all
+banaction = iptables-allports
+port     = anyport
+logpath  = /var/log/auth.log
+maxretry = 6
+
+[xinetd-fail]
+
+enabled   = false
+filter    = xinetd-fail
+port      = all
+banaction = iptables-multiport-log
+logpath   = /var/log/daemon.log
+maxretry  = 2
+
+
+[ssh-ddos]
+
+enabled  = true
+port     = ssh
+filter   = sshd-ddos
+logpath  = /var/log/auth.log
+maxretry = 6
+
+
+# Here we use blackhole routes for not requiring any additional kernel support
+# to store large volumes of banned IPs
+
+[ssh-route]
+
+enabled = false
+filter = sshd
+action = route
+logpath = /var/log/sshd.log
+maxretry = 6
+
+# Here we use a combination of Netfilter/Iptables and IPsets
+# for storing large volumes of banned IPs
+#
+# IPset comes in two versions. See ipset -V for which one to use
+# requires the ipset package and kernel support.
+[ssh-iptables-ipset4]
+
+enabled  = false
+port     = ssh
+filter   = sshd
+banaction = iptables-ipset-proto4
+logpath  = /var/log/sshd.log
+maxretry = 6
+
+[ssh-iptables-ipset6]
+
+enabled  = false
+port     = ssh
+filter   = sshd
+banaction = iptables-ipset-proto6
+logpath  = /var/log/sshd.log
+maxretry = 6
+
+
+#
+# HTTP servers
+#
+
+[apache]
+
+enabled  = true
+port     = http,https
+filter   = apache-auth
+logpath  = /var/log/apache*/*error.log
+maxretry = 6
+
+# default action is now multiport, so apache-multiport jail was left
+# for compatibility with previous (<0.7.6-2) releases
+[apache-multiport]
+
+enabled   = false
+port      = http,https
+filter    = apache-auth
+logpath   = /var/log/apache*/*error.log
+maxretry  = 6
+
+[apache-noscript]
+
+enabled  = true
+port     = http,https
+filter   = apache-noscript
+logpath  = /var/log/apache*/*error.log
+maxretry = 6
+
+[apache-overflows]
+
+enabled  = true
+port     = http,https
+filter   = apache-overflows
+logpath  = /var/log/apache*/*error.log
+maxretry = 2
+
+[apache-modsecurity]
+
+enabled  = true
+filter   = apache-modsecurity
+port     = http,https
+logpath  = /var/log/apache*/*error.log
+maxretry = 2
+
+[apache-nohome]
+
+enabled  = true
+filter   = apache-nohome
+port     = http,https
+logpath  = /var/log/apache*/*error.log
+maxretry = 2
+
+# Ban attackers that try to use PHP's URL-fopen() functionality
+# through GET/POST variables. - Experimental, with more than a year
+# of usage in production environments.
+
+[php-url-fopen]
+
+enabled = false
+port    = http,https
+filter  = php-url-fopen
+logpath = /var/www/*/logs/access_log
+
+# A simple PHP-fastcgi jail which works with lighttpd.
+# If you run a lighttpd server, then you probably will
+# find these kinds of messages in your error_log:
+#   ALERT – tried to register forbidden variable ‘GLOBALS’
+#   through GET variables (attacker '1.2.3.4', file '/var/www/default/htdocs/index.php')
+
+[lighttpd-fastcgi]
+
+enabled = false
+port    = http,https
+filter  = lighttpd-fastcgi
+logpath = /var/log/lighttpd/error.log
+
+# Same as above for mod_auth
+# It catches wrong authentifications
+
+[lighttpd-auth]
+
+enabled = false
+port    = http,https
+filter  = suhosin
+logpath = /var/log/lighttpd/error.log
+
+[nginx-http-auth]
+
+enabled = false
+filter  = nginx-http-auth
+port    = http,https
+logpath = /var/log/nginx/error.log
+
+# Monitor roundcube server
+
+[roundcube-auth]
+
+enabled  = false
+filter   = roundcube-auth
+port     = http,https
+logpath  = /var/log/roundcube/userlogins
+
+
+[sogo-auth]
+
+enabled  = false
+filter   = sogo-auth
+port     = http, https
+# without proxy this would be:
+# port    = 20000
+logpath  = /var/log/sogo/sogo.log
+
+
+#
+# FTP servers
+#
+
+[vsftpd]
+
+enabled  = false
+port     = ftp,ftp-data,ftps,ftps-data
+filter   = vsftpd
+logpath  = /var/log/vsftpd.log
+# or overwrite it in jails.local to be
+# logpath = /var/log/auth.log
+# if you want to rely on PAM failed login attempts
+# vsftpd's failregex should match both of those formats
+maxretry = 6
+
+
+[proftpd]
+
+enabled  = false
+port     = ftp,ftp-data,ftps,ftps-data
+filter   = proftpd
+logpath  = /var/log/proftpd/proftpd.log
+maxretry = 6
+
+
+[pure-ftpd]
+
+enabled  = false
+port     = ftp,ftp-data,ftps,ftps-data
+filter   = pure-ftpd
+logpath  = /var/log/syslog
+maxretry = 6
+
+
+[wuftpd]
+
+enabled  = false
+port     = ftp,ftp-data,ftps,ftps-data
+filter   = wuftpd
+logpath  = /var/log/syslog
+maxretry = 6
+
+
+#
+# Mail servers
+#
+
+[postfix]
+
+enabled  = true
+port     = smtp,ssmtp,submission
+filter   = postfix
+logpath  = /var/log/mail.log
+
+
+[couriersmtp]
+
+enabled  = false
+port     = smtp,ssmtp,submission
+filter   = couriersmtp
+logpath  = /var/log/mail.log
+
+
+#
+# Mail servers authenticators: might be used for smtp,ftp,imap servers, so
+# all relevant ports get banned
+#
+
+[courierauth]
+
+enabled  = false
+port     = smtp,ssmtp,submission,imap2,imap3,imaps,pop3,pop3s
+filter   = courierlogin
+logpath  = /var/log/mail.log
+
+
+[sasl]
+
+enabled  = false
+port     = smtp,ssmtp,submission,imap2,imap3,imaps,pop3,pop3s
+filter   = postfix-sasl
+# You might consider monitoring /var/log/mail.warn instead if you are
+# running postfix since it would provide the same log lines at the
+# "warn" level but overall at the smaller filesize.
+logpath  = /var/log/mail.log
+
+[dovecot]
+
+enabled = false
+port    = smtp,ssmtp,submission,imap2,imap3,imaps,pop3,pop3s
+filter  = dovecot
+logpath = /var/log/mail.log
+
+# To log wrong MySQL access attempts add to /etc/my.cnf:
+# log-error=/var/log/mysqld.log
+# log-warning = 2
+[mysqld-auth]
+
+enabled  = false
+filter   = mysqld-auth
+port     = 3306
+logpath  = /var/log/mysqld.log
+
+
+# DNS Servers
+
+
+# These jails block attacks against named (bind9). By default, logging is off
+# with bind9 installation. You will need something like this:
+#
+# logging {
+#     channel security_file {
+#         file "/var/log/named/security.log" versions 3 size 30m;
+#         severity dynamic;
+#         print-time yes;
+#     };
+#     category security {
+#         security_file;
+#     };
+# };
+#
+# in your named.conf to provide proper logging
+
+# !!! WARNING !!!
+#   Since UDP is connection-less protocol, spoofing of IP and imitation
+#   of illegal actions is way too simple.  Thus enabling of this filter
+#   might provide an easy way for implementing a DoS against a chosen
+#   victim. See
+#    http://nion.modprobe.de/blog/archives/690-fail2ban-+-dns-fail.html
+#   Please DO NOT USE this jail unless you know what you are doing.
+#[named-refused-udp]
+#
+#enabled  = false
+#port     = domain,953
+#protocol = udp
+#filter   = named-refused
+#logpath  = /var/log/named/security.log
+
+[named-refused-tcp]
+
+enabled  = false
+port     = domain,953
+protocol = tcp
+filter   = named-refused
+logpath  = /var/log/named/security.log
+
+[freeswitch]
+
+enabled  = false
+filter   = freeswitch
+logpath  = /var/log/freeswitch.log
+maxretry = 10
+action   = iptables-multiport[name=freeswitch-tcp, port="5060,5061,5080,5081", protocol=tcp]
+           iptables-multiport[name=freeswitch-udp, port="5060,5061,5080,5081", protocol=udp]
+
+[ejabberd-auth]
+
+enabled  = false
+filter   = ejabberd-auth
+port     = xmpp-client
+protocol = tcp
+logpath  = /var/log/ejabberd/ejabberd.log
+
+
+# Multiple jails, 1 per protocol, are necessary ATM:
+# see https://github.com/fail2ban/fail2ban/issues/37
+[asterisk-tcp]
+
+enabled  = false
+filter   = asterisk
+port     = 5060,5061
+protocol = tcp
+logpath  = /var/log/asterisk/messages
+
+[asterisk-udp]
+
+enabled  = false
+filter	 = asterisk
+port     = 5060,5061
+protocol = udp
+logpath  = /var/log/asterisk/messages
+
+
+# Jail for more extended banning of persistent abusers
+# !!! WARNING !!!
+#   Make sure that your loglevel specified in fail2ban.conf/.local
+#   is not at DEBUG level -- which might then cause fail2ban to fall into
+#   an infinite loop constantly feeding itself with non-informative lines
+[recidive]
+
+enabled  = false
+filter   = recidive
+logpath  = /var/log/fail2ban.log
+action   = iptables-allports[name=recidive]
+           sendmail-whois-lines[name=recidive, logpath=/var/log/fail2ban.log]
+bantime  = 604800  ; 1 week
+findtime = 86400   ; 1 day
+maxretry = 5
+
+# See the IMPORTANT note in action.d/blocklist_de.conf for when to
+# use this action
+#
+# Report block via blocklist.de fail2ban reporting service API
+# See action.d/blocklist_de.conf for more information
+[ssh-blocklist]
+
+enabled  = false
+filter   = sshd
+action   = iptables[name=SSH, port=ssh, protocol=tcp]
+           sendmail-whois[name=SSH, dest="%(destemail)s", sender="%(sender)s", sendername="%(sendername)s"]
+           blocklist_de[email="%(sender)s", apikey="xxxxxx", service="%(filter)s"]
+logpath  = /var/log/sshd.log
+maxretry = 20
+
+
+# consider low maxretry and a long bantime
+# nobody except your own Nagios server should ever probe nrpe
+[nagios]
+enabled  = false
+filter   = nagios
+action   = iptables[name=Nagios, port=5666, protocol=tcp]
+           sendmail-whois[name=Nagios, dest="%(destemail)s", sender="%(sender)s", sendername="%(sendername)s"]
+logpath  = /var/log/messages     ; nrpe.cfg may define a different log_facility
+maxretry = 1

etc/ssh/sshd_config

+# Package generated configuration file
+# See the sshd_config(5) manpage for details
+
+# What ports, IPs and protocols we listen for
+Port 22
+# Use these options to restrict which interfaces/protocols sshd will bind to
+#ListenAddress ::
+#ListenAddress 0.0.0.0
+Protocol 2
+# HostKeys for protocol version 2
+HostKey /etc/ssh/ssh_host_rsa_key
+HostKey /etc/ssh/ssh_host_dsa_key
+HostKey /etc/ssh/ssh_host_ecdsa_key
+HostKey /etc/ssh/ssh_host_ed25519_key
+#Privilege Separation is turned on for security
+UsePrivilegeSeparation yes
+
+# Lifetime and size of ephemeral version 1 server key
+KeyRegenerationInterval 3600
+ServerKeyBits 1024
+
+# Logging
+SyslogFacility AUTH
+LogLevel INFO
+
+# Authentication:
+LoginGraceTime 120
+PermitRootLogin without-password
+StrictModes yes
+
+RSAAuthentication yes
+PubkeyAuthentication yes
+#AuthorizedKeysFile	%h/.ssh/authorized_keys
+
+# Don't read the user's ~/.rhosts and ~/.shosts files
+IgnoreRhosts yes
+# For this to work you will also need host keys in /etc/ssh_known_hosts
+RhostsRSAAuthentication no
+# similar for protocol version 2
+HostbasedAuthentication no
+# Uncomment if you don't trust ~/.ssh/known_hosts for RhostsRSAAuthentication
+#IgnoreUserKnownHosts yes
+
+# To enable empty passwords, change to yes (NOT RECOMMENDED)
+PermitEmptyPasswords no
+
+# Change to yes to enable challenge-response passwords (beware issues with
+# some PAM modules and threads)
+ChallengeResponseAuthentication no
+
+# Change to no to disable tunnelled clear text passwords
+PasswordAuthentication no
+
+# Kerberos options
+#KerberosAuthentication no
+#KerberosGetAFSToken no
+#KerberosOrLocalPasswd yes
+#KerberosTicketCleanup yes
+
+# GSSAPI options
+#GSSAPIAuthentication no
+#GSSAPICleanupCredentials yes
+
+X11Forwarding yes
+X11DisplayOffset 10
+PrintMotd no
+PrintLastLog yes
+TCPKeepAlive yes
+#UseLogin no
+
+#MaxStartups 10:30:60
+#Banner /etc/issue.net
+
+# Allow client to pass locale environment variables
+AcceptEnv LANG LC_*
+
+Subsystem sftp /usr/lib/openssh/sftp-server
+
+# 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
+StreamLocalBindUnlink yes

initInstall.sh

@@ -89,3 +89,13 @@ line="0 7 * * 1 $PWD/healthReport.sh -m 'Rapport de santé hebdomadaire' > /dev/
 mkdir -p /root/.ssh
 cat id_rsa.pub >> /root/.ssh/authorized_keys
 chmod 600  /root/.ssh/authorized_keys
+
+#Fail 2 ban
+cp /etc/fail2ban/* /etc/fail2ban
+systemctl restart fail2ban
+
+#Ssh
+cp /etc/ssh/* /etc/ssh
+systemctl restart ssh
+
+