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Hello,
I'm having a problem with Fail2Ban adding drop rules to the iptables chain despite having specific IP's and IP Blocks listed on the ignoreips lines in the jail.conf, jail.local. I have even restarted iptables after stopping the fail2ban service. The whitelisted IP's still end up showing up as a DROP rule. Could someone please assist me with what I'm missing? I have obfuscated the domains and first two octets for security.
Thank you,
Chain INPUT (policy DROP)
num target prot opt source destination
1 DROP all -- er1.swift.*****.net anywhere
2 DROP all -- x.x.1.18 anywhere
3 fail2ban-dovecot tcp -- anywhere anywhere multiport dports http,https,smtp,submission,pop3,pop3s,imap2,imaps,sieve
4 fail2ban-roundcube tcp -- anywhere anywhere multiport dports http,https,smtp,submission,pop3,pop3s,imap2,imaps,sieve
5 fail2ban-ssh tcp -- anywhere anywhere tcp dpt:ssh
6 ACCEPT all -- anywhere anywhere state RELATED,ESTABLISHED
7 ACCEPT all -- anywhere anywhere
8 ACCEPT all -- er1.swift.*****.net anywhere
9 ACCEPT udp -- 10.0.0.25 anywhere udp dpt:snmp
10 ACCEPT udp -- noc2.*****.net anywhere udp dpt:snmp
11 ACCEPT udp -- vpn.*****.net anywhere udp dpt:snmp
12 ACCEPT tcp -- anywhere anywhere tcp dpt:http
13 ACCEPT tcp -- anywhere anywhere tcp dpt:https
14 ACCEPT tcp -- anywhere anywhere tcp dpt:smtp
15 ACCEPT tcp -- anywhere anywhere tcp dpt:ssmtp
16 ACCEPT tcp -- anywhere anywhere tcp dpt:589 state NEW,ESTABLISHED
17 ACCEPT tcp -- anywhere anywhere tcp dpt:submission
18 ACCEPT tcp -- anywhere anywhere tcp dpt:pop3
19 ACCEPT tcp -- anywhere anywhere tcp dpt:pop3s
20 ACCEPT tcp -- anywhere anywhere tcp dpt:imap2
21 ACCEPT tcp -- anywhere anywhere tcp dpt:imaps
22 ACCEPT tcp -- vpn.*****.net anywhere tcp dpt:ssh
23 ACCEPT icmp -- anywhere anywhere icmp echo-request
24 ACCEPT tcp -- vpn.*****.net anywhere tcp dpt:mysql
25 ACCEPT tcp -- vpn.*****.net anywhere tcp dpt:20133
26 ACCEPT tcp -- anywhere anywhere tcp dpt:http limit: avg 25/min burst 100
Chain FORWARD (policy DROP)
num target prot opt source destination
1 DROP all -- er1.swift.*****.net anywhere
2 DROP all -- x.x.2.18 anywhere
Chain OUTPUT (policy ACCEPT)
num target prot opt source destination
1 ACCEPT tcp -- anywhere anywhere tcp spt:589 state ESTABLISHED
Chain fail2ban-dovecot (1 references)
num target prot opt source destination
1 RETURN all -- anywhere anywhere
Chain fail2ban-postfix (0 references)
num target prot opt source destination
1 RETURN all -- anywhere anywhere
Chain fail2ban-roundcube (1 references)
num target prot opt source destination
1 RETURN all -- anywhere anywhere
Chain fail2ban-ssh (1 references)
num target prot opt source destination
1 RETURN all -- anywhere anywhere# Fail2Ban not running
ps aux | grep fail2ban
root 17297 0.0 0.0 9384 924 pts/0 R+ 09:27 0:00 grep --color=auto fail2ban# iptables active fw rules
Chain INPUT (policy DROP)
num target prot opt source destination
1 DROP all -- x.x.1.18 anywhere
2 ACCEPT all -- anywhere anywhere state RELATED,ESTABLISHED
3 ACCEPT all -- anywhere anywhere
4 ACCEPT all -- er1.swift.*****.net anywhere
5 ACCEPT udp -- 10.0.0.25 anywhere udp dpt:snmp
6 ACCEPT udp -- noc2.*****.net anywhere udp dpt:snmp
7 ACCEPT udp -- vpn.*****.net anywhere udp dpt:snmp
8 ACCEPT tcp -- anywhere anywhere tcp dpt:http
9 ACCEPT tcp -- anywhere anywhere tcp dpt:https
10 ACCEPT tcp -- anywhere anywhere tcp dpt:smtp
11 ACCEPT tcp -- anywhere anywhere tcp dpt:ssmtp
12 ACCEPT tcp -- anywhere anywhere tcp dpt:589 state NEW,ESTABLISHED
13 ACCEPT tcp -- anywhere anywhere tcp dpt:submission
14 ACCEPT tcp -- anywhere anywhere tcp dpt:pop3
15 ACCEPT tcp -- anywhere anywhere tcp dpt:pop3s
16 ACCEPT tcp -- anywhere anywhere tcp dpt:imap2
17 ACCEPT tcp -- anywhere anywhere tcp dpt:imaps
18 ACCEPT tcp -- vpn.*****.net anywhere tcp dpt:ssh
19 ACCEPT icmp -- anywhere anywhere icmp echo-request
20 ACCEPT tcp -- vpn.*****.net anywhere tcp dpt:mysql
21 ACCEPT tcp -- vpn.*****.net anywhere tcp dpt:20133
22 ACCEPT tcp -- anywhere anywhere tcp dpt:http limit: avg 25/min burst 100
Chain FORWARD (policy DROP)
num target prot opt source destination
1 DROP all -- x.x.1.18 anywhere
Chain OUTPUT (policy ACCEPT)
num target prot opt source destination
1 ACCEPT tcp -- anywhere anywhere tcp spt:589 state ESTABLISHED# /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.
#
# To avoid merges during upgrades DO NOT MODIFY THIS FILE
# and rather provide your changes in /etc/fail2ban/jail.local
#
# Author: Yaroslav O. Halchenko <debian@onerussian.com>
#
# $Revision$
#
# 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 = 127.0.0.0/8 10.0.0.0/8 172.16.0.0/12 192.168.0.0/16 x.x.2.153 x.x.2.25 smtp663.redcondor.net smtp664.redcondor.net spam1.****.net x.x.25.0/24 x.x.26.0/24 x.x.27.0/24 x.x.28.0/24 12.44.144.0/24 x.x.1.30/32 cv.*****.com x.x.1.18 er1.swift.*****.net x.x.1.26 x.x.1.33 x.x.1.34 12.38.236.2
bantime = 600
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 = noc@*****.net
#
# 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_)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 = false
port = ssh
filter = sshd
logpath = /var/log/auth.log
maxretry = 6
[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 = 6
#
# HTTP servers
#
[apache]
enabled = false
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 = false
port = http,https
filter = apache-noscript
logpath = /var/log/apache*/*error.log
maxretry = 6
[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 = 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/auth.log
maxretry = 6
[wuftpd]
enabled = false
port = ftp,ftp-data,ftps,ftps-data
filter = wuftpd
logpath = /var/log/auth.log
maxretry = 6
#
# 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
# 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# /etc/fail2ban/jail.local
#
# File generated by iRedMail (2012.09.26.17.23.08):
#
# Version: 0.8.2
# Project: http://www.iredmail.org/
#
# Community: http://www.iredmail.org/forum/
#
# Please refer to /etc/fail2ban/jail.conf for more examples.
[ssh-iredmail]
enabled = true
filter = sshd
action = iptables[name=ssh, port="ssh", protocol=tcp]
sendmail-whois[name=ssh, dest=tonyd@*****.net, sender=fail2ban@mail3.*****.net]
logpath = /var/log/auth.log
maxretry = 5
ignoreip = 127.0.0.1 127.0.0.0/8 10.0.0.0/8 172.16.0.0/12 192.168.0.0/16
[roundcube-iredmail]
enabled = true
filter = roundcube.iredmail
action = iptables-multiport[name=roundcube, port="http,https,smtp,submission,pop3,pop3s,imap,imaps,sieve", protocol=tcp]
sendmail-whois[name=roundcube, dest=tonyd@*****.net, sender=fail2ban@mail3.*****.net]
logpath = /var/log/mail.log
findtime = 3600
maxretry = 5
bantime = 3600
ignoreip = 127.0.0.0/8 10.0.0.0/8 172.16.0.0/12 192.168.0.0/16 x.x.2.153/32 x.x.2.25/32 x.x.25.0/24 x.x.26.0/24 x.x.27.0/24 x.x.28.0/24 12.44.144.0/24 x.x.1.30/32 cv.*****.com x.x.1.18/32 er1.swift.*****.net x.x.1.34/32 12.38.236.2/32
[dovecot-iredmail]
enabled = true
filter = dovecot.iredmail
action = iptables-multiport[name=dovecot, port="http,https,smtp,submission,pop3,pop3s,imap,imaps,sieve", protocol=tcp]
sendmail-whois[name=dovecot, dest=tonyd@*****.net, sender=fail2ban@mail3.*****.net]
logpath = /var/log/dovecot.log
maxretry = 5
findtime = 300
bantime = 3600
#ignoreip = 127.0.0.1 127.0.0.0/8 10.0.0.0/8 172.16.0.0/12 192.168.0.0/16 x.x.2.153 x.x.2.25
ignoreip = 127.0.0.1 127.0.0.0/8 10.0.0.0/8 172.16.0.0/12 192.168.0.0/16 x.x.2.153/32 x.x.2.25/32 smtp663.redcondor.net smtp664.redcondor.net spam1.*****.net x.x.25.0/24 x.x.26.0/24 x.x.27.0/24 x.x.28.0/24 12.44.144.0/24 x.x.1.30/32 cv.*****.com x.x.1.18/32 er1.swift.*****.net x.x.1.34/32 12.38.236.2/32
[postfix-iredmail]
enabled = true
filter = postfix.iredmail
action = iptables-multiport[name=postfix, port="http,https,smtp,submission,pop3,pop3s,imap,imaps,sieve", protocol=tcp]
sendmail-whois[name=postfix, dest=tonyd@*****.net, sender=fail2ban@mail3.*****.net]
# sendmail[name=Postfix, dest=you@mail.com]
logpath = /var/log/mail.log
bantime = 3600
maxretry = 5
ignoreip = 127.0.0.1 127.0.0.0/8 10.0.0.0/8 172.16.0.0/12 192.168.0.0/16 x.x.2.153/32 x.x.2.25/32 smtp663.redcondor.net smtp664.redcondor.net spam1.*****.net x.x.25.0/24 x.x.26.0/24 x.x.27.0/24 x.x.28.0/24 12.44.144.0/24 x.x.1.30/32 cv.*****.com x.x.1.18/32 er1.swift.*****.net x.x.1.34/32 12.38.236.2/32# IPTABLEs Default Rules
#
# Sample iptables rules. It should be localted at:
# /etc/sysconfig/iptables
#
# Shipped within iRedMail project:
# * http://iRedMail.googlecode.com/
#
*filter
:INPUT DROP [0:0]
:FORWARD DROP [0:0]
:OUTPUT ACCEPT [0:0]
# Keep state.
-A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT
# Loop device.
-A INPUT -i lo -j ACCEPT
# Whitelist er1.swift.****.net
-A INPUT -s x.x.1.30 -j ACCEPT
# SNMP
-A INPUT -s 10.0.0.25 -p udp --dport 161 -j ACCEPT
-A INPUT -s x.x.3.11 -p udp --dport 161 -j ACCEPT
-A INPUT -s x.x.2.153 -p udp --dport 161 -j ACCEPT
# http, https
-A INPUT -p tcp --dport 80 -j ACCEPT
-A INPUT -p tcp --dport 443 -j ACCEPT
# smtp (25,465,589) Port forward 589 to 25
-A INPUT -p tcp --dport 25 -j ACCEPT
-A INPUT -p tcp --dport 465 -j ACCEPT
-A INPUT -i eth0 -p tcp --dport 589 -m state --state NEW,ESTABLISHED -j ACCEPT
-A OUTPUT -o eth0 -p tcp --sport 589 -m state --state ESTABLISHED -j ACCEPT
-A PREROUTING -t nat -p tcp --dport 589 -j REDIRECT --to-port 25
# ssmtp (587)
-A INPUT -p tcp --dport 587 -j ACCEPT
# pop3, pop3s
-A INPUT -p tcp --dport 110 -j ACCEPT
-A INPUT -p tcp --dport 995 -j ACCEPT
# imap, imaps
-A INPUT -p tcp --dport 143 -j ACCEPT
-A INPUT -p tcp --dport 993 -j ACCEPT
# ssh
-A INPUT -s x.x.2.153 -p tcp --dport 22 -j ACCEPT
# Allow PING from remote hosts.
-A INPUT -p icmp --icmp-type echo-request -j ACCEPT
# ejabberd
#-A INPUT -p tcp -m multiport --dport 5222,5223,5280 -j ACCEPT
# ldap/ldaps
#-A INPUT -p tcp -m multiport --dport 389,636 -j ACCEPT
# ftp.
#-A INPUT -p tcp -m multiport --dport 21,20 -j ACCEPT
# Allow connections from x.x.2.153 to MySQL and Plat Prov Listener
-A INPUT -s x.x.2.153 -p tcp -m tcp --dport 3306 -j ACCEPT
-A INPUT -s x.x.2.153 -p tcp -m tcp --dport 20133 -j ACCEPT
# DOS Protection
-A INPUT -p tcp --dport 80 -m limit --limit 25/minute --limit-burst 100 -j ACCEPT
COMMIT