Alan Orth
0605f70f2e
This is active banning of IPs that are brute forcing login attempts
to SSH, versus the passive banning of 10,000 abusive IPs from the
abuseipdb.com blacklist. For now I am banning IPs that fail to log
in successfully more than twelve times in a one-hour period, but
these settings might change, and I can override them at the group
and host level if needed.
Currently this works for CentOS 7, Ubuntu 16.04, and Ubuntu 18.04,
with minor differences in the systemd configuration due to older
versions on some distributions.
You can see the status of the jail like this:
# fail2ban-client status sshd
Status for the jail: sshd
|- Filter
| |- Currently failed: 0
| |- Total failed: 0
| `- Journal matches: _SYSTEMD_UNIT=sshd.service + _COMM=sshd
`- Actions
|- Currently banned: 1
|- Total banned: 1
`- Banned IP list: 106.13.112.20
You can unban IPs like this:
# fail2ban-client set sshd unbanip 106.13.112.20
21 lines
736 B
YAML
21 lines
736 B
YAML
---
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- name: Configure fail2ban sshd filter
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template: src=etc/fail2ban/jail.d/sshd.local.j2 dest=/etc/fail2ban/jail.d/sshd.local owner=root mode=0644
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notify: restart fail2ban
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- name: Create fail2ban service override directory
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file: path=/etc/systemd/system/fail2ban.service.d state=directory owner=root mode=0755
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# See Arch Linux's example: https://wiki.archlinux.org/index.php/Fail2ban
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- name: Configure fail2ban service override
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template: src=etc/systemd/system/fail2ban.service.d/override.conf.j2 dest=/etc/systemd/system/fail2ban.service.d/override.conf owner=root mode=0644
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notify:
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- reload systemd
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- restart fail2ban
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- name: Enable fail2ban service
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systemd: name=fail2ban enabled=yes
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# vim: set sw=2 ts=2:
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