Commit Graph

7 Commits

Author SHA1 Message Date
0605f70f2e
roles/common: Add support for fail2ban
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
2019-10-26 16:36:07 +02:00
80df220602
roles/common: Restart firewalld instead of reload
I'm having problems with reload hanging on Debian 10 so I will just
revert to the older behavior of restarting.
2019-10-05 12:29:30 +03:00
b6a54ca4d1 roles/common: Reload firewalld instead of restart
There is no need to bounce the service, just reload it.
2017-11-05 00:27:44 +02:00
0a92f3ae8f roles/common: Use systemd module instead of "service"
This was new in Ansible 2.2 but I didn't notice until now. All of our
servers are running distributions with systemd so let's just use this.
2017-11-05 00:27:44 +02:00
1fc2453703 roles/common: Add firewalld support
Needed in Ubuntu 15.04 where iptables-persistent is going away. I
have added translations of the current IPv4 and IPv6 iptables rules.

Signed-off-by: Alan Orth <alan.orth@gmail.com>
2015-08-23 00:02:39 +03:00
68493beba3
roles/common: Reload sshd instead of restarting
No need to restart for a config change.

Signed-off-by: Alan Orth <alan.orth@gmail.com>
2015-08-23 00:01:17 +03:00
60b8ecdd4c
Initial commit
Signed-off-by: Alan Orth <alan.orth@gmail.com>
2014-08-17 00:35:57 +03:00