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Changed Fail2ban config for #109

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This commit is contained in:
Thomas VIAL 2016-04-18 22:57:39 +02:00
parent eb11714550
commit 180390107e
4 changed files with 18 additions and 42 deletions
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2
Dockerfile
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@ -26,6 +26,8 @@ RUN useradd -u 5000 -d /home/docker -s /bin/bash -p $(echo docker | openssl pass
# Configure Fail2ban
ADD target/fail2ban/jail.conf /etc/fail2ban/jail.conf
ADD target/fail2ban/filters.d/dovecot.conf /etc/fail2ban/filters.d/dovecot.conf
RUN echo "ignoreregex =" >> /etc/fail2ban/filter.d/postfix-sasl.conf
# Enables Clamav
RUN chmod 644 /etc/clamav/freshclam.conf

16
target/fail2ban/filters.d/dovecot.conf Normal file
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@ -0,0 +1,16 @@
[INCLUDES]
before = common.conf
[Definition]
_daemon = (auth|dovecot(-auth)?|auth-worker)
failregex = ^%(__prefix_line)s(pam_unix(\(dovecot:auth\))?:)?\s+authentication failure; logname=\S* uid=\S* euid=\S* tty=dovecot ruser=\S* rhost=<HOST>(\s+user=\S*)?\s*$
^%(__prefix_line)s(pop3|imap)-login: (Info: )?(Aborted login|Disconnected)(: Inactivity)? \(((no auth attempts|auth failed, \d+ attempts)( in \d+ secs)?|tried to use (disabled|disallowed) \S+ auth)\):( user=<\S*>,)?( method=\S+,)? rip=<HOST>, lip=(\d{1,3}\.){3}\d{1,3}(, session=<\w+>)?(, TLS( handshaking)?(: Disconnected)?)?\s*$
^%(__prefix_line)s(Info|dovecot: auth\(default\)): pam\(\S+,<HOST>\): pam_authenticate\(\) failed: (User not known to the underlying authentication module: \d+ Time\(s\)|Authentication failure \(password mismatch\?\))\s*$
^\s.*passwd-file\(\S*,<HOST>\): unknown user.*$
(?: pop3-login|imap-login): .*(?:Authentication failure|Aborted login \(auth failed|Aborted login \(tried to use disabled|Disconnected \(auth failed).*rip=(?P<host>\S*),.*
## ^%(__prefix_line)spasswd-file\(\S*,<HOST>\): unknown user.*$
ignoreregex =

3
target/fail2ban/jail.conf
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@ -158,6 +158,3 @@ filter = recidive
logpath = /var/log/fail2ban.log
action = iptables-allports[name=recidive]
sendmail-whois-lines[name=recidive, logpath=/var/log/fail2ban.log]
bantime = 10800
findtime = 10800
maxretry = 5

39
target/start-mailserver.sh
View file

@ -262,45 +262,6 @@ SA_TAG2=${SA_TAG2:="6.31"} && sed -i -r 's/^\$sa_tag2_level_deflt (.*);/\$sa_tag
SA_KILL=${SA_KILL:="6.31"} && sed -i -r 's/^\$sa_kill_level_deflt (.*);/\$sa_kill_level_deflt = '$SA_KILL';/g' /etc/amavis/conf.d/20-debian_defaults
test -e /tmp/spamassassin/rules.cf && cp /tmp/spamassassin/rules.cf /etc/spamassassin/
echo "Configuring fail2ban"
# enable filters
awk 'BEGIN{unit=0}{if ($1=="[postfix]" || $1=="[dovecot]" || $1=="[sasl]") {unit=1;}
if ($1=="enabled" && unit==1) $3="true";
else if ($1=="logpath" && unit==1) $3="/var/log/mail/mail.log";
print;
if (unit==1 && $1~/\[/ && $1!~/postfix|dovecot|sasl/) unit=0;
}' /etc/fail2ban/jail.conf > /tmp/jail.conf.new && mv /tmp/jail.conf.new /etc/fail2ban/jail.conf && rm -f /tmp/jail.conf.new
cat > /etc/fail2ban/filter.d/dovecot.conf << _EOF_
# Fail2Ban filter Dovecot authentication and pop3/imap server
#
[INCLUDES]
before = common.conf
[Definition]
_daemon = (auth|dovecot(-auth)?|auth-worker)
failregex = ^%(__prefix_line)s(pam_unix(\(dovecot:auth\))?:)?\s+authentication failure; logname=\S* uid=\S* euid=\S* tty=dovecot ruser=\S* rhost=<HOST>(\s+user=\S*)?\s*$
^%(__prefix_line)s(pop3|imap)-login: (Info: )?(Aborted login|Disconnected)(: Inactivity)? \(((no auth attempts|auth failed, \d+ attempts)( in \d+ secs)?|tried to use (disabled|disallowed) \S+ auth)\):( user=<\S*>,)?( method=\S+,)? rip=<HOST>, lip=(\d{1,3}\.){3}\d{1,3}(, session=<\w+>)?(, TLS( handshaking)?(: Disconnected)?)?\s*$
^%(__prefix_line)s(Info|dovecot: auth\(default\)): pam\(\S+,<HOST>\): pam_authenticate\(\) failed: (User not known to the underlying authentication module: \d+ Time\(s\)|Authentication failure \(password mismatch\?\))\s*$
^\s.*passwd-file\(\S*,<HOST>\): unknown user.*$
(?: pop3-login|imap-login): .*(?:Authentication failure|Aborted login \(auth failed|Aborted login \(tried to use disabled|Disconnected \(auth failed).*rip=(?P<host>\S*),.*
## ^%(__prefix_line)spasswd-file\(\S*,<HOST>\): unknown user.*$
ignoreregex =
_EOF_
# increase ban time and find time to 3h
sed -i "/^bantime *=/c\bantime = 10800" /etc/fail2ban/jail.conf
sed -i "/^findtime *=/c\findtime = 10800" /etc/fail2ban/jail.conf
# avoid warning on startup
echo "ignoreregex =" >> /etc/fail2ban/filter.d/postfix-sasl.conf
# continue to write the log information in the newly created file after rotating the old log file
sed -i -r "/^#?compress/c\compress\ncopytruncate" /etc/logrotate.conf