Fail2Ban not picking up dropbear auth failures
0
raspbian
Linux [hostname] 4.9.36+ #1015 Thu Jul 6 16:07:57 BST 2017 armv6l GNU/Linux
fail2ban is not picking up the dropbear auth failures. This was working for openssh without issues. I went to dropbear to reduce memory usage.
Here is my auth.log to show logging is working
dropbear[2640]: Bad password attempt for 'username' from 192.168.1.151:50780
My jail.local
#dropbear shh config password
[dropbear]
enabled = true
port = ssh
filter = dropbear
logpath = /var/log/auth.log
bantime = 900
banaction = iptables-allports
findtime = 900
maxretry = 3
My dropbear.conf fail2ban filter
[Definition]
_daemon = dropbear
# Option: failregex
# Notes.: regex to match the password failures messages in the logfile. The
# host must be matched by a group named "host". The tag "<HOST>" can
# be used for standard IP/hostname matching and is only an alias for
# (?:::f{4,6}:)?(?P<host>S+)
# Values: TEXT
# These match the unmodified dropbear messages. It isn't possible to
# match the source of the 'exit before auth' messages from dropbear.
#
failregex = ^%(__prefix_line)slogin attempt for nonexistent user ('.*' )?from <HOST>:.*s*$
^%(__prefix_line)sbad password attempt for .+ from <HOST>:.*s*$
# The only line we need to match with the modified dropbear.
# NOTE: The failregex below is ONLY intended to work with a patched
# version of Dropbear as described here:
# http://www.unchartedbackwaters.co.uk/pyblosxom/static/patches
And the standard jail.config (these options should be overwrote with the .local jail)
# 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 = 6
[dropbear]
enabled = true
port = ssh
filter = sshd
logpath = /var/log/dropbear
maxretry = 6
raspberry-pi raspbian fail2ban dropbear
edited Dec 20 '18 at 0:01
Rui F Ribeiro
39k1479130
asked Jul 12 '17 at 17:26
PInoob
32
add a comment |
0
raspbian
Linux [hostname] 4.9.36+ #1015 Thu Jul 6 16:07:57 BST 2017 armv6l GNU/Linux
fail2ban is not picking up the dropbear auth failures. This was working for openssh without issues. I went to dropbear to reduce memory usage.
Here is my auth.log to show logging is working
dropbear[2640]: Bad password attempt for 'username' from 192.168.1.151:50780
My jail.local
#dropbear shh config password
[dropbear]
enabled = true
port = ssh
filter = dropbear
logpath = /var/log/auth.log
bantime = 900
banaction = iptables-allports
findtime = 900
maxretry = 3
My dropbear.conf fail2ban filter
[Definition]
_daemon = dropbear
# Option: failregex
# Notes.: regex to match the password failures messages in the logfile. The
# host must be matched by a group named "host". The tag "<HOST>" can
# be used for standard IP/hostname matching and is only an alias for
# (?:::f{4,6}:)?(?P<host>S+)
# Values: TEXT
# These match the unmodified dropbear messages. It isn't possible to
# match the source of the 'exit before auth' messages from dropbear.
#
failregex = ^%(__prefix_line)slogin attempt for nonexistent user ('.*' )?from <HOST>:.*s*$
^%(__prefix_line)sbad password attempt for .+ from <HOST>:.*s*$
# The only line we need to match with the modified dropbear.
# NOTE: The failregex below is ONLY intended to work with a patched
# version of Dropbear as described here:
# http://www.unchartedbackwaters.co.uk/pyblosxom/static/patches
And the standard jail.config (these options should be overwrote with the .local jail)
# 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 = 6
[dropbear]
enabled = true
port = ssh
filter = sshd
logpath = /var/log/dropbear
maxretry = 6
raspberry-pi raspbian fail2ban dropbear
edited Dec 20 '18 at 0:01
Rui F Ribeiro
39k1479130
asked Jul 12 '17 at 17:26
PInoob
32
Yea that was exactly it. The default regular expression in the fail2ban dropbear filter has a typo...or the log string for dropbear has a typo depending on how you want to look at ! Please put an answer so I can vote you up man!
– PInoob
Jul 12 '17 at 17:56
add a comment |
0
0
0
1
raspbian
Linux [hostname] 4.9.36+ #1015 Thu Jul 6 16:07:57 BST 2017 armv6l GNU/Linux
fail2ban is not picking up the dropbear auth failures. This was working for openssh without issues. I went to dropbear to reduce memory usage.
Here is my auth.log to show logging is working
dropbear[2640]: Bad password attempt for 'username' from 192.168.1.151:50780
My jail.local
#dropbear shh config password
[dropbear]
enabled = true
port = ssh
filter = dropbear
logpath = /var/log/auth.log
bantime = 900
banaction = iptables-allports
findtime = 900
maxretry = 3
My dropbear.conf fail2ban filter
[Definition]
_daemon = dropbear
# Option: failregex
# Notes.: regex to match the password failures messages in the logfile. The
# host must be matched by a group named "host". The tag "<HOST>" can
# be used for standard IP/hostname matching and is only an alias for
# (?:::f{4,6}:)?(?P<host>S+)
# Values: TEXT
# These match the unmodified dropbear messages. It isn't possible to
# match the source of the 'exit before auth' messages from dropbear.
#
failregex = ^%(__prefix_line)slogin attempt for nonexistent user ('.*' )?from <HOST>:.*s*$
^%(__prefix_line)sbad password attempt for .+ from <HOST>:.*s*$
# The only line we need to match with the modified dropbear.
# NOTE: The failregex below is ONLY intended to work with a patched
# version of Dropbear as described here:
# http://www.unchartedbackwaters.co.uk/pyblosxom/static/patches
And the standard jail.config (these options should be overwrote with the .local jail)
# 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 = 6
[dropbear]
enabled = true
port = ssh
filter = sshd
logpath = /var/log/dropbear
maxretry = 6
raspberry-pi raspbian fail2ban dropbear
edited Dec 20 '18 at 0:01
Rui F Ribeiro
39k1479130
asked Jul 12 '17 at 17:26
PInoob
32
raspbian
Linux [hostname] 4.9.36+ #1015 Thu Jul 6 16:07:57 BST 2017 armv6l GNU/Linux
fail2ban is not picking up the dropbear auth failures. This was working for openssh without issues. I went to dropbear to reduce memory usage.
Here is my auth.log to show logging is working
dropbear[2640]: Bad password attempt for 'username' from 192.168.1.151:50780
My jail.local
#dropbear shh config password
[dropbear]
enabled = true
port = ssh
filter = dropbear
logpath = /var/log/auth.log
bantime = 900
banaction = iptables-allports
findtime = 900
maxretry = 3
My dropbear.conf fail2ban filter
[Definition]
_daemon = dropbear
# Option: failregex
# Notes.: regex to match the password failures messages in the logfile. The
# host must be matched by a group named "host". The tag "<HOST>" can
# be used for standard IP/hostname matching and is only an alias for
# (?:::f{4,6}:)?(?P<host>S+)
# Values: TEXT
# These match the unmodified dropbear messages. It isn't possible to
# match the source of the 'exit before auth' messages from dropbear.
#
failregex = ^%(__prefix_line)slogin attempt for nonexistent user ('.*' )?from <HOST>:.*s*$
^%(__prefix_line)sbad password attempt for .+ from <HOST>:.*s*$
# The only line we need to match with the modified dropbear.
# NOTE: The failregex below is ONLY intended to work with a patched
# version of Dropbear as described here:
# http://www.unchartedbackwaters.co.uk/pyblosxom/static/patches
And the standard jail.config (these options should be overwrote with the .local jail)
# 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 = 6
[dropbear]
enabled = true
port = ssh
filter = sshd
logpath = /var/log/dropbear
maxretry = 6
raspberry-pi raspbian fail2ban dropbear
raspberry-pi raspbian fail2ban dropbear
edited Dec 20 '18 at 0:01
Rui F Ribeiro
39k1479130
asked Jul 12 '17 at 17:26
PInoob
32
edited Dec 20 '18 at 0:01
Rui F Ribeiro
39k1479130
asked Jul 12 '17 at 17:26
PInoob
32
edited Dec 20 '18 at 0:01
Rui F Ribeiro
39k1479130
edited Dec 20 '18 at 0:01
Rui F Ribeiro
39k1479130
edited Dec 20 '18 at 0:01
Rui F Ribeiro
39k1479130
39k1479130
asked Jul 12 '17 at 17:26
PInoob
32
asked Jul 12 '17 at 17:26
PInoob
32
asked Jul 12 '17 at 17:26
PInoob
32
32
Yea that was exactly it. The default regular expression in the fail2ban dropbear filter has a typo...or the log string for dropbear has a typo depending on how you want to look at ! Please put an answer so I can vote you up man!
– PInoob
Jul 12 '17 at 17:56
add a comment |
Yea that was exactly it. The default regular expression in the fail2ban dropbear filter has a typo...or the log string for dropbear has a typo depending on how you want to look at ! Please put an answer so I can vote you up man!
– PInoob
Jul 12 '17 at 17:56
Yea that was exactly it. The default regular expression in the fail2ban dropbear filter has a typo...or the log string for dropbear has a typo depending on how you want to look at ! Please put an answer so I can vote you up man!
– PInoob
Jul 12 '17 at 17:56
Yea that was exactly it. The default regular expression in the fail2ban dropbear filter has a typo...or the log string for dropbear has a typo depending on how you want to look at ! Please put an answer so I can vote you up man!
– PInoob
Jul 12 '17 at 17:56
add a comment |
1 Answer
1
active
oldest
votes
1
The dropbear.conf regex does not match the entries in auth.log:
Bad password attempt for... /* auth.log */
bad password attempt for... /* dropbear.conf */
If you edit dropbear.conf to respect case, fail2ban should catch the logged authentication failures.
answered Jul 12 '17 at 18:08
user4556274
5,36811224
^%(__prefix_line)slogin attempt for nonexistent user ('.*' )?from <HOST>:.*s*$ also needs to be changed for this condition to work!
– PInoob
Jul 12 '17 at 18:14
add a comment |
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1 Answer
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1 Answer
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oldest
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active
oldest
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active
oldest
votes
1
The dropbear.conf regex does not match the entries in auth.log:
Bad password attempt for... /* auth.log */
bad password attempt for... /* dropbear.conf */
If you edit dropbear.conf to respect case, fail2ban should catch the logged authentication failures.
answered Jul 12 '17 at 18:08
user4556274
5,36811224
^%(__prefix_line)slogin attempt for nonexistent user ('.*' )?from <HOST>:.*s*$ also needs to be changed for this condition to work!
– PInoob
Jul 12 '17 at 18:14
add a comment |
1
The dropbear.conf regex does not match the entries in auth.log:
Bad password attempt for... /* auth.log */
bad password attempt for... /* dropbear.conf */
If you edit dropbear.conf to respect case, fail2ban should catch the logged authentication failures.
answered Jul 12 '17 at 18:08
user4556274
5,36811224
^%(__prefix_line)slogin attempt for nonexistent user ('.*' )?from <HOST>:.*s*$ also needs to be changed for this condition to work!
– PInoob
Jul 12 '17 at 18:14
add a comment |
1
1
1
The dropbear.conf regex does not match the entries in auth.log:
Bad password attempt for... /* auth.log */
bad password attempt for... /* dropbear.conf */
If you edit dropbear.conf to respect case, fail2ban should catch the logged authentication failures.
answered Jul 12 '17 at 18:08
user4556274
5,36811224
The dropbear.conf regex does not match the entries in auth.log:
Bad password attempt for... /* auth.log */
bad password attempt for... /* dropbear.conf */
If you edit dropbear.conf to respect case, fail2ban should catch the logged authentication failures.
answered Jul 12 '17 at 18:08
user4556274
5,36811224
answered Jul 12 '17 at 18:08
user4556274
5,36811224
answered Jul 12 '17 at 18:08
user4556274
5,36811224
answered Jul 12 '17 at 18:08
user4556274
5,36811224
5,36811224
^%(__prefix_line)slogin attempt for nonexistent user ('.*' )?from <HOST>:.*s*$ also needs to be changed for this condition to work!
– PInoob
Jul 12 '17 at 18:14
add a comment |
^%(__prefix_line)slogin attempt for nonexistent user ('.*' )?from <HOST>:.*s*$ also needs to be changed for this condition to work!
– PInoob
Jul 12 '17 at 18:14
^%(__prefix_line)slogin attempt for nonexistent user ('.*' )?from <HOST>:.*s*$ also needs to be changed for this condition to work!
– PInoob
Jul 12 '17 at 18:14
^%(__prefix_line)slogin attempt for nonexistent user ('.*' )?from <HOST>:.*s*$ also needs to be changed for this condition to work!
– PInoob
Jul 12 '17 at 18:14
add a comment |
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Yea that was exactly it. The default regular expression in the fail2ban dropbear filter has a typo...or the log string for dropbear has a typo depending on how you want to look at ! Please put an answer so I can vote you up man!
– PInoob
Jul 12 '17 at 17:56