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centos7 - fail2ban running on CentOS 7 & getting “ssh connection refused”

Is anyone successfully running fail2ban on CentOS 7 and can tell me how to do it?




I tried to install fail2ban with yum install fail2ban and run it (there are no extra rules in iptables -L which seems odd according to what I found on the net).



As soon as I reboot the server I can't login as root or other user via ssh. The ports are not visible when scanning and of course I get this error when I try to connect: 



ssh: connect to host XXX.XXX.XXX.XXX port 12321: Connection refused


I changed the ssh port, but I also tried it with port 22 without luck.




I wonder if someone knows a solutions to this problem?



It has to be a problem with fail2ban because I didn't install anything else.





UPDATE
I can log in via ssh after reboot. But no html page is served. Output of iptables -L:





Chain INPUT (policy ACCEPT) target prot opt source
destination f2b-sshd tcp -- anywhere anywhere
multiport dports ssh ACCEPT all -- anywhere anywhere
ctstate RELATED,ESTABLISHED ACCEPT all -- anywhere
anywhere INPUT_direct all -- anywhere
anywhere INPUT_ZONES_SOURCE all -- anywhere
anywhere INPUT_ZONES all -- anywhere
anywhere ACCEPT icmp -- anywhere anywhere
REJECT all -- anywhere anywhere
reject-with icmp-host-prohibited



Chain FORWARD (policy ACCEPT) target prot opt source
destination ACCEPT all -- anywhere anywhere
ctstate RELATED,ESTABLISHED ACCEPT all -- anywhere
anywhere FORWARD_direct all -- anywhere
anywhere FORWARD_IN_ZONES_SOURCE all -- anywhere
anywhere FORWARD_IN_ZONES all -- anywhere
anywhere FORWARD_OUT_ZONES_SOURCE all -- anywhere
anywhere FORWARD_OUT_ZONES all -- anywhere
anywhere ACCEPT icmp -- anywhere anywhere
REJECT all -- anywhere anywhere
reject-with icmp-host-prohibited



Chain OUTPUT (policy ACCEPT) target prot opt source
destination OUTPUT_direct all -- anywhere
anywhere




Chain FORWARD_IN_ZONES (1 references) target prot opt source
destination FWDI_public all -- anywhere
anywhere [goto] FWDI_public all -- anywhere
anywhere [goto]



Chain FORWARD_IN_ZONES_SOURCE (1 references) target prot opt
source destination



Chain FORWARD_OUT_ZONES (1 references) target prot opt source
destination FWDO_public all -- anywhere
anywhere [goto] FWDO_public all -- anywhere
anywhere [goto]



Chain FORWARD_OUT_ZONES_SOURCE (1 references) target prot opt
source destination




Chain FORWARD_direct (1 references) target prot opt source
destination



Chain FWDI_public (2 references) target prot opt source
destination FWDI_public_log all -- anywhere
anywhere FWDI_public_deny all -- anywhere
anywhere FWDI_public_allow all -- anywhere
anywhere



Chain FWDI_public_allow (1 references) target prot opt source
destination



Chain FWDI_public_deny (1 references) target prot opt source
destination



Chain FWDI_public_log (1 references) target prot opt source
destination




Chain FWDO_public (2 references) target prot opt source
destination FWDO_public_log all -- anywhere
anywhere FWDO_public_deny all -- anywhere
anywhere FWDO_public_allow all -- anywhere
anywhere



Chain FWDO_public_allow (1 references) target prot opt source
destination



Chain FWDO_public_deny (1 references) target prot opt source
destination



Chain FWDO_public_log (1 references) target prot opt source
destination



Chain INPUT_ZONES (1 references) target prot opt source
destination IN_public all -- anywhere anywhere

[goto] IN_public all -- anywhere anywhere
[goto]



Chain INPUT_ZONES_SOURCE (1 references) target prot opt source
destination



Chain INPUT_direct (1 references) target prot opt source
destination



Chain IN_public (2 references) target prot opt source
destination IN_public_log all -- anywhere
anywhere IN_public_deny all -- anywhere
anywhere IN_public_allow all -- anywhere
anywhere



Chain IN_public_allow (1 references) target prot opt source
destination ACCEPT tcp -- anywhere anywhere
tcp dpt:ssh ctstate NEW




Chain IN_public_deny (1 references) target prot opt source
destination



Chain IN_public_log (1 references) target prot opt source
destination



Chain OUTPUT_direct (1 references) target prot opt source
destination



Chain f2b-sshd (1 references) target prot opt source
destination RETURN all -- anywhere anywhere


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