fail2ban

[Jeffrey Ross <jeff@xxxxxxxxxx>]

I'm trying to configure fail2ban and it appears as if it is correctly identifying addresses to ban however it doesn't appear to be successful in banning hosts:


2017-09-24 16:01:46,073 fail2ban.actions        [3591]: NOTICE  [sshd] Ban 91.210.178.96
2017-09-24 16:01:46,494 fail2ban.action         [3591]: ERROR   ipset add fail2ban-sshd 91.210.178.96 timeout 31536000 -exist -- stdout: b''
2017-09-24 16:01:46,494 fail2ban.action         [3591]: ERROR   ipset add fail2ban-sshd 91.210.178.96 timeout 31536000 -exist -- stderr: b'ipset v6.29: The set with the given name does not exist\n'
2017-09-24 16:01:46,495 fail2ban.action         [3591]: ERROR   ipset add fail2ban-sshd 91.210.178.96 timeout 31536000 -exist -- returned 1
2017-09-24 16:01:46,495 fail2ban.actions        [3591]: ERROR   Failed to execute ban jail 'sshd' action 'firewallcmd-ipset' info 'CallingMap({'ip': '91.210.178.96', 'failures': 25, 'time': 1506283306.0737438, 'matches': '2017-09-24T12:50:33.918187xyzzy.bubble.org sshd[31335]: Invalid user admin from 91.210.178.96 port 51448\n2017-09-24T12:50:35.229995xyzzy.bubble.org sshd[31337]: Invalid user admin from 91.210.178.96 port 51456\n2017-09-24T12:50:36.520259xyzzy.bubble.org sshd[31339]: Invalid user admin from 91.210.178.96 port 51461\n2017-09-24T12:50:37.869954xyzzy.bubble.org sshd[31343]:

{removed part of the very long line showing all the matches in fail2 ban}


91.210.178.96 port 51705', 'ipmatches': <function Actions.__checkBan.<locals>.<lambda> at 0x7f3ed78c7950>, 'ipjailmatches': <function Actions.__checkBan.<locals>.<lambda> at 0x7f3ed78c7c80>, 'ipfailures': <function Actions.__checkBan.<locals>.<lambda> at 0x7f3ed78c7d90>, 'ipjailfailures': <function Actions.__checkBan.<locals>.<lambda> at 0x7f3ed78c7d08>})': Error banning 91.210.178.96
2017-09-24 16:01:46,909 fail2ban.actions        [3591]: NOTICE  [sshd] 91.210.178.96 already banned
2017-09-24 16:01:47,911 fail2ban.actions        [3591]: NOTICE  [sshd] 91.210.178.96 already banned

This is Fedora 26

/etc/fail2ban/fail2ban.conf is set to distribution default
/etc/fail2ban/jail.conf is set to distribution default

I've added in to fail2ban.d/local.conf

[fail2ban]
enabled = true
filter = fail2ban
action = ""> logpath = /var/log/fail2ban.log
# findtime: 1 day
findtime = 86400
# bantime: 1 year
bantime = 31536000
maxretry = 5

to jail.d/00-firewalld.conf

[DEFAULT]
banaction = firewallcmd-ipset
sender = fail2ban@xxxxxxxxxxx
destemail = root
action = "">

to jaild/10-sshd.conf

[sshd]
enabled=true
# findtime: 1 day
findtime = 86400
# bantime: 1 year
bantime = 31536000

and yes the system is currently setup to accept only public/private key authentication for SSH, I'm assuming that once I get ssh figured out I can get the other services figured out.

Thanks, Jeff

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