Salut Ricardo, merci de ta réponse.
Oui j’ai modifier la config, la voila:
[ul]# 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.
To avoid merges during upgrades DO NOT MODIFY THIS FILE
and rather provide your changes in /etc/fail2ban/jail.local
$Revision$
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
ignoreip = 127.0.0.1/8
bantime = 86400
findtime = 3600
maxretry = 3
“backend” specifies the backend used to get files modification. Available
options are “gamin”, “polling” and “auto”.
yoh: For some reason Debian shipped python-gamin didn’t work as expected
This issue left ToDo, so polling is default backend for now
backend = auto
Destination email address used solely for the interpolations in
jail.{conf,local} configuration files.
destemail = contact@axxxx.org
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"]
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"]
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_mw)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 = 2
[dropbear]
enabled = false
port = ssh
filter = sshd
logpath = /var/log/dropbear
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 = false
port = ssh
filter = sshd-ddos
logpath = /var/log/auth.log
maxretry = 2
HTTP servers
[apache]
enabled = false
port = http,https
filter = apache-auth
logpath = /var/log/apache*/*error.log
maxretry = 2
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 = 2
[apache-noscript]
enabled = false
port = http,https
filter = apache-noscript
logpath = /var/log/apache*/*error.log
maxretry = 2
[apache-overflows]
enabled = false
port = http,https
filter = apache-overflows
logpath = /var/log/apache*/*error.log
maxretry = 2
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 = 1
[proftpd]
enabled = false
port = ftp,ftp-data,ftps,ftps-data
filter = proftpd
logpath = /var/log/proftpd/proftpd.log
maxretry = 1
[pure-ftpd]
enabled = false
port = ftp,ftp-data,ftps,ftps-data
filter = pure-ftpd
logpath = /var/log/auth.log
maxretry = 1
[wuftpd]
enabled = false
port = ftp,ftp-data,ftps,ftps-data
filter = wuftpd
logpath = /var/log/auth.log
maxretry = 1
Mail servers
[postfix]
enabled = false
port = smtp,ssmtp
filter = postfix
logpath = /var/log/mail.log
[couriersmtp]
enabled = false
port = smtp,ssmtp
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,imap2,imap3,imaps,pop3,pop3s
filter = courierlogin
logpath = /var/log/mail.log
[sasl]
enabled = false
port = smtp,ssmtp,imap2,imap3,imaps,pop3,pop3s
filter = 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,imap2,imap3,imaps,pop3,pop3s
filter = dovecot
logpath = /var/log/mail.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
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
[apache-w00tw00t]
enabled = true
filter = apache-w00tw00t
action = iptables[name=Apache-w00tw00t,port=80,protocol=tcp]
logpath = /var/log/apache*/*access.log
maxretry = 1
[/ul]
