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161 lines
5.1 KiB
Plaintext
161 lines
5.1 KiB
Plaintext
# Fail2Ban configuration file.
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#
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# This file was composed for Debian systems from the original one
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# provided now under /usr/share/doc/fail2ban/examples/jail.conf
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# for additional examples.
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#
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# Comments: use '#' for comment lines and ';' for inline comments
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#
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# To avoid merges during upgrades DO NOT MODIFY THIS FILE
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# and rather provide your changes in /etc/fail2ban/jail.local
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#
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# The DEFAULT allows a global definition of the options. They can be overridden
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# in each jail afterwards.
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[DEFAULT]
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# "ignoreip" can be an IP address, a CIDR mask or a DNS host. Fail2ban will not
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# ban a host which matches an address in this list. Several addresses can be
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# defined using space separator.
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ignoreip = 127.0.0.1/8
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# "bantime" is the number of seconds that a host is banned.
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bantime = 10800
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# A host is banned if it has generated "maxretry" during the last "findtime"
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# seconds.
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findtime = 10800
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maxretry = 3
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# "backend" specifies the backend used to get files modification.
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# Available options are "pyinotify", "gamin", "polling" and "auto".
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# This option can be overridden in each jail as well.
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#
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# pyinotify: requires pyinotify (a file alteration monitor) to be installed.
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# If pyinotify is not installed, Fail2ban will use auto.
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# gamin: requires Gamin (a file alteration monitor) to be installed.
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# If Gamin is not installed, Fail2ban will use auto.
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# polling: uses a polling algorithm which does not require external libraries.
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# auto: will try to use the following backends, in order:
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# pyinotify, gamin, polling.
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backend = gamin
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# "usedns" specifies if jails should trust hostnames in logs,
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# warn when reverse DNS lookups are performed, or ignore all hostnames in logs
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#
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# yes: if a hostname is encountered, a reverse DNS lookup will be performed.
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# warn: if a hostname is encountered, a reverse DNS lookup will be performed,
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# but it will be logged as a warning.
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# no: if a hostname is encountered, will not be used for banning,
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# but it will be logged as info.
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usedns = warn
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#
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# Destination email address used solely for the interpolations in
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# jail.{conf,local} configuration files.
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destemail = root@localhost
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#
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# Name of the sender for mta actions
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sendername = Fail2Ban
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#
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# ACTIONS
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#
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# Default banning action (e.g. iptables, iptables-new,
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# iptables-multiport, shorewall, etc) It is used to define
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# action_* variables. Can be overridden globally or per
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# section within jail.local file
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banaction = iptables-multiport
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# email action. Since 0.8.1 upstream fail2ban uses sendmail
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# MTA for the mailing. Change mta configuration parameter to mail
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# if you want to revert to conventional 'mail'.
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mta = sendmail
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# Default protocol
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protocol = tcp
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# Specify chain where jumps would need to be added in iptables-* actions
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chain = INPUT
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#
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# Action shortcuts. To be used to define action parameter
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# The simplest action to take: ban only
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action_ = %(banaction)s[name=%(__name__)s, port="%(port)s", protocol="%(protocol)s", chain="%(chain)s"]
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# ban & send an e-mail with whois report to the destemail.
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action_mw = %(banaction)s[name=%(__name__)s, port="%(port)s", protocol="%(protocol)s", chain="%(chain)s"]
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%(mta)s-whois[name=%(__name__)s, dest="%(destemail)s", protocol="%(protocol)s", chain="%(chain)s", sendername="%(sendername)s"]
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# ban & send an e-mail with whois report and relevant log lines
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# to the destemail.
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action_mwl = %(banaction)s[name=%(__name__)s, port="%(port)s", protocol="%(protocol)s", chain="%(chain)s"]
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%(mta)s-whois-lines[name=%(__name__)s, dest="%(destemail)s", logpath=%(logpath)s, chain="%(chain)s", sendername="%(sendername)s"]
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# Choose default action. To change, just override value of 'action' with the
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# interpolation to the chosen action shortcut (e.g. action_mw, action_mwl, etc) in jail.local
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# globally (section [DEFAULT]) or per specific section
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action = %(action_)s
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#
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# JAILS
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#
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[ssh]
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enabled = true
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port = ssh
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filter = sshd
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logpath = /var/log/auth.log
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maxretry = 6
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#
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# Mail servers
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#
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[postfix]
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enabled = true
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port = smtp,ssmtp,submission
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filter = postfix
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logpath = /var/log/mail/mail.log
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#
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# Mail servers authenticators: might be used for smtp,ftp,imap servers, so
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# all relevant ports get banned
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#
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[sasl]
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enabled = true
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port = smtp,ssmtp,submission,imap2,imap3,imaps,pop3,pop3s
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filter = postfix-sasl
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# You might consider monitoring /var/log/mail.warn instead if you are
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# running postfix since it would provide the same log lines at the
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# "warn" level but overall at the smaller filesize.
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logpath = /var/log/mail/mail.log
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[dovecot]
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enabled = true
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port = smtp,ssmtp,submission,imap2,imap3,imaps,pop3,pop3s
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filter = dovecot
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logpath = /var/log/mail/mail.log
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# Jail for more extended banning of persistent abusers
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# !!! WARNING !!!
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# Make sure that your loglevel specified in fail2ban.conf/.local
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# is not at DEBUG level -- which might then cause fail2ban to fall into
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# an infinite loop constantly feeding itself with non-informative lines
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[recidive]
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enabled = false
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filter = recidive
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logpath = /var/log/fail2ban.log
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action = iptables-allports[name=recidive]
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sendmail-whois-lines[name=recidive, logpath=/var/log/fail2ban.log]
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