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Защита от "брута".

Автор: Gentoos 3 сообщений 3018 просмотров
#366025

Как Fail2ban защищает от брута?
Ввожу пароли до бесконечности - бана нет.(речь о ssh)

text
# Fail2Ban jail specifications file
#
# Comments: use '#' for comment lines and ';' for inline comments
#
# Changes:  in most of the cases you should not modify this
#           file, but provide customizations in jail.local file, e.g.:
#
# [DEFAULT]
# bantime = 3600
#
# [ssh-iptables]
# enabled = true
#

# 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

# "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" is the number of failures before a host get banned. maxretry = 2

# "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

# This jail corresponds to the standard configuration in Fail2ban 0.6. # The mail-whois action send a notification e-mail with a whois request # in the body.

[ssh-iptables]

enabled = true filter = sshd action = iptables[name=SSH, port=ssh, protocol=tcp] sendmail-whois[name=SSH, dest=you@example.com, sender=fail2ban@example.com] logpath = /var/log/sshd.log maxretry = 2

[proftpd-iptables]

enabled = true filter = proftpd action = iptables[name=ProFTPD, port=ftp, protocol=tcp] sendmail-whois[name=ProFTPD, dest=you@example.com] logpath = /var/log/proftpd/proftpd.log maxretry = 2

# This jail forces the backend to "polling".

[sasl-iptables]

enabled = false filter = sasl backend = polling action = iptables[name=sasl, port=smtp, protocol=tcp] sendmail-whois[name=sasl, dest=you@example.com] logpath = /var/log/mail.log

# Here we use TCP-Wrappers instead of Netfilter/Iptables. "ignoreregex" is # used to avoid banning the user "myuser".

[ssh-tcpwrapper]

enabled = false filter = sshd action = hostsdeny sendmail-whois[name=SSH, dest=you@example.com] ignoreregex = for myuser from logpath = /var/log/sshd.log

# This jail demonstrates the use of wildcards in "logpath". # Moreover, it is possible to give other files on a new line.

[apache-tcpwrapper]

enabled = false filter = apache-auth action = hostsdeny logpath = /var/log/apache*/*error.log /home/www/myhomepage/error.log maxretry = 6

# The hosts.deny path can be defined with the "file" argument if it is # not in /etc.

[postfix-tcpwrapper]

enabled = false filter = postfix action = hostsdeny[file=/not/a/standard/path/hosts.deny] sendmail[name=Postfix, dest=you@example.com] logpath = /var/log/postfix.log bantime = 300

# Do not ban anybody. Just report information about the remote host. # A notification is sent at most every 600 seconds (bantime).

[vsftpd-notification]

enabled = false filter = vsftpd action = sendmail-whois[name=VSFTPD, dest=you@example.com] logpath = /var/log/vsftpd.log maxretry = 5 bantime = 1800

# Same as above but with banning the IP address.

[vsftpd-iptables]

enabled = false filter = vsftpd action = iptables[name=VSFTPD, port=ftp, protocol=tcp] sendmail-whois[name=VSFTPD, dest=you@example.com] logpath = /var/log/vsftpd.log maxretry = 5 bantime = 1800

# Ban hosts which agent identifies spammer robots crawling the web # for email addresses. The mail outputs are buffered.

[apache-badbots]

enabled = false filter = apache-badbots action = iptables-multiport[name=BadBots, port="http,https"] sendmail-buffered[name=BadBots, lines=5, dest=you@example.com] logpath = /var/www/*/logs/access_log bantime = 172800 maxretry = 1

# Use shorewall instead of iptables.

[apache-shorewall]

enabled = false filter = apache-noscript action = shorewall sendmail[name=Postfix, dest=you@example.com] logpath = /var/log/apache2/error_log

# 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 maxretry = 1

# 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') # This jail would block the IP 1.2.3.4.

[lighttpd-fastcgi]

enabled = false port = http,https filter = lighttpd-fastcgi # adapt the following two items as needed logpath = /var/log/lighttpd/error.log maxretry = 2

# Same as above for mod_auth # It catches wrong authentifications

[lighttpd-auth]

enabled = false port = http,https filter = lighttpd-auth # adapt the following two items as needed logpath = /var/log/lighttpd/error.log maxretry = 2

# This jail uses ipfw, the standard firewall on FreeBSD. The "ignoreip" # option is overridden in this jail. Moreover, the action "mail-whois" defines # the variable "name" which contains a comma using "". The characters '' are # valid too.

[ssh-ipfw]

enabled = false filter = sshd action = ipfw[localhost=192.168.0.1] sendmail-whois[name="SSH,IPFW", dest=you@example.com] logpath = /var/log/auth.log ignoreip = 168.192.0.1

# 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. # This jail blocks UDP traffic for DNS requests.

# !!! 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 # [url]http://nion.modprobe.de/blog/archives/690-fail2ban-+-dns-fail.html[/url] # Please DO NOT USE this jail unless you know what you are doing. # # [named-refused-udp] # # enabled = false # filter = named-refused # action = iptables-multiport[name=Named, port="domain,953", protocol=udp] # sendmail-whois[name=Named, dest=you@example.com] # logpath = /var/log/named/security.log # ignoreip = 168.192.0.1

# This jail blocks TCP traffic for DNS requests.

[named-refused-tcp]

enabled = false filter = named-refused action = iptables-multiport[name=Named, port="domain,953", protocol=tcp] sendmail-whois[name=Named, dest=you@example.com] logpath = /var/log/named/security.log ignoreip = 168.192.0.1

# Multiple jails, 1 per protocol, are necessary ATM: # see [url]https://github.com/fail2ban/fail2ban/issues/37[/url] [asterisk-tcp]

enabled = false filter = asterisk action = iptables-multiport[name=asterisk-tcp, port="5060,5061", protocol=tcp] sendmail-whois[name=Asterisk, dest=you@example.com, sender=fail2ban@example.com] logpath = /var/log/asterisk/messages maxretry = 10

[asterisk-udp]

enabled = false filter = asterisk action = iptables-multiport[name=asterisk-udp, port="5060,5061", protocol=udp] sendmail-whois[name=Asterisk, dest=you@example.com, sender=fail2ban@example.com] logpath = /var/log/asterisk/messages maxretry = 10

# 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

#366135

Используй denyhosts для этого.

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