2016-07-29 15:12:27,856 fail2ban.filter         [17476]: INFO    [sshd] Found 1.2.3.4
2016-07-29 15:12:29,860 fail2ban.filter         [17476]: INFO    [sshd] Found 1.2.3.4

Jul 29 15:12:27 fsp1 sshd[17655]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=myhostname  user=test
Jul 29 15:12:29 fsp1 sshd[17655]: Failed password for test from 1.2.3.4 port 62969 ssh2

#%PAM-1.0
#auth     required  pam_securetty.so     #disable remote root
auth      include   system-remote-login
account   include   system-remote-login
password  include   system-remote-login
session   include   system-remote-login

#%PAM-1.0

auth      include   system-login
account   include   system-login
password  include   system-login
session   include   system-login

#%PAM-1.0

auth       required   pam_tally.so         onerr=succeed file=/var/log/faillog
auth       required   pam_shells.so
auth       requisite  pam_nologin.so
auth       include    system-auth

account    required   pam_access.so
account    required   pam_nologin.so
account    include    system-auth

password   include    system-auth

session    optional   pam_loginuid.so
session    include    system-auth
session    optional   pam_motd.so          motd=/etc/motd
session    optional   pam_mail.so          dir=/var/spool/mail standard quiet
-session   optional   pam_systemd.so
session    required   pam_env.so

# Fail2Ban filter for openssh
#
# If you want to protect OpenSSH from being bruteforced by password
# authentication then get public key authentication working before disabling
# PasswordAuthentication in sshd_config.
#
#
# "Connection from <HOST> port d+" requires LogLevel VERBOSE in sshd_config
#

[INCLUDES]

# Read common prefixes. If any customizations available -- read them from
# common.local
before = common.conf

[Definition]

_daemon = sshd

failregex = ^%(__prefix_line)s(?:error: PAM: )?[aA]uthentication (?:failure|error) for .* from <HOST>( via S+)?s*$
            ^%(__prefix_line)s(?:error: PAM: )?User not known to the underlying authentication module for .* from <HOST>s*$
            ^%(__prefix_line)sFailed S+ for .*? from <HOST>(?: port d*)?(?: sshd*)?(: (ruser .*|(S+ ID S+ (serial d+) CA )?S+ %(__md5hex)s(, client user ".*", client host ".*")?))?s*$
            ^%(__prefix_line)sROOT LOGIN REFUSED.* FROM <HOST>s*$
            ^%(__prefix_line)s[iI](?:llegal|nvalid) user .* from <HOST>s*$
            ^%(__prefix_line)sUser .+ from <HOST> not allowed because not listed in AllowUserss*$
            ^%(__prefix_line)sUser .+ from <HOST> not allowed because listed in DenyUserss*$
            ^%(__prefix_line)sUser .+ from <HOST> not allowed because not in any groups*$
            ^%(__prefix_line)srefused connect from S+ (<HOST>)s*$
            ^%(__prefix_line)s(?:error: )?Received disconnect from <HOST>: 3: .*: Auth fail(?: [preauth])?$
            ^%(__prefix_line)sUser .+ from <HOST> not allowed because a group is listed in DenyGroupss*$
            ^%(__prefix_line)sUser .+ from <HOST> not allowed because none of user's groups are listed in AllowGroupss*$
            ^(?P<__prefix>%(__prefix_line)s)User .+ not allowed because account is locked<SKIPLINES>(?P=__prefix)(?:error: )?Received disconnect from <HOST>: 11: .+ [preauth]$
            ^(?P<__prefix>%(__prefix_line)s)Disconnecting: Too many authentication failures for .+? [preauth]<SKIPLINES>(?P=__prefix)(?:error: )?Connection closed by <HOST> [preauth]$
            ^(?P<__prefix>%(__prefix_line)s)Connection from <HOST> port d+(?: on S+ port d+)?<SKIPLINES>(?P=__prefix)Disconnecting: Too many authentication failures for .+? [preauth]$
            ^%(__prefix_line)s(error: )?maximum authentication attempts exceeded for .* from <HOST>(?: port d*)?(?: sshd*)? [preauth]$
            ^%(__prefix_line)spam_unix(sshd:auth):s+authentication failure;s*logname=S*s*uid=d*s*euid=d*s*tty=S*s*ruser=S*s*rhost=<HOST>s.*$

ignoreregex =

[Init]

# "maxlines" is number of log lines to buffer for multi-line regex searches
maxlines = 10

journalmatch = _SYSTEMD_UNIT=sshd.service + _COMM=sshd

# DEV Notes:
#
#   "Failed S+ for .*? from <HOST>..." failregex uses non-greedy catch-all because
#   it is coming before use of <HOST> which is not hard-anchored at the end as well,
#   and later catch-all's could contain user-provided input, which need to be greedily
#   matched away first.
#
# Author: Cyril Jaquier, Yaroslav Halchenko, Petr Voralek, Daniel Black