Why would one use #fail2ban ..

This is why 🙂

Chain INPUT (policy ACCEPT)
target prot opt source destination
fail2ban-postfix-sasl tcp — anywhere anywhere multiport dports smtp
fail2ban-dovecot-pop3imap tcp — anywhere anywhere multiport dports pop3,pop3s,imap2,imaps
fail2ban-pureftpd tcp — anywhere anywhere multiport dports ftp
fail2ban-ssh tcp — anywhere anywhere multiport dports ssh

Chain FORWARD (policy ACCEPT)
target prot opt source destination

Chain OUTPUT (policy ACCEPT)
target prot opt source destination

Chain fail2ban-dovecot-pop3imap (1 references)
target prot opt source destination
RETURN all — anywhere anywhere

Chain fail2ban-postfix-sasl (1 references)
target prot opt source destination
REJECT all — 157.122.148.247 anywhere reject-with icmp-port-unreachable
REJECT all — 193.189.117.162 anywhere reject-with icmp-port-unreachable
REJECT all — 193.189.117.151 anywhere reject-with icmp-port-unreachable
REJECT all — aus1345893.lnk.telstra.net anywhere reject-with icmp-port-unreachable
REJECT all — 187-54-83-70.gnace704.e.brasiltelecom.net.br anywhere reject-with icmp-port-unreachable
REJECT all — 41.65.158.124 anywhere reject-with icmp-port-unreachable
REJECT all — 185.125.4.196 anywhere reject-with icmp-port-unreachable
RETURN all — anywhere anywhere

Chain fail2ban-pureftpd (1 references)
target prot opt source destination
REJECT all — localhost anywhere reject-with icmp-port-unreachable
REJECT all — 46.105.49.146 anywhere reject-with icmp-port-unreachable
REJECT all — 221.5.49.36 anywhere reject-with icmp-port-unreachable
RETURN all — anywhere anywhere

Chain fail2ban-ssh (1 references)
target prot opt source destination
REJECT all — 119.164.254.50 anywhere reject-with icmp-port-unreachable
REJECT all — 113.12.184.238 anywhere reject-with icmp-port-unreachable
REJECT all — customer-187-157-170-18-sta.uninet-ide.com.mx anywhere reject-with icmp-port-unreachable
REJECT all — 171.234.8.73 anywhere reject-with icmp-port-unreachable
REJECT all — 121.15.13.237 anywhere reject-with icmp-port-unreachable
REJECT all — 117.3.103.61 anywhere reject-with icmp-port-unreachable
REJECT all — 103.4.231.200 anywhere reject-with icmp-port-unreachable
REJECT all — 91.224.160.10 anywhere reject-with icmp-port-unreachable
REJECT all — host-156.196.1.35-static.tedata.net anywhere reject-with icmp-port-unreachable
REJECT all — 222.76.215.239 anywhere reject-with icmp-port-unreachable
REJECT all — 27.72.65.228 anywhere reject-with icmp-port-unreachable
REJECT all — 116.31.116.10 anywhere reject-with icmp-port-unreachable
REJECT all — 123.238.175.59.broad.wh.hb.dynamic.163data.com.cn anywhere reject-with icmp-port-unreachable
REJECT all — 104.148.116.66 anywhere reject-with icmp-port-unreachable
REJECT all — 124.158.5.115 anywhere reject-with icmp-port-unreachable
REJECT all — ip-198.12-150-220.ip.secureserver.net anywhere reject-with icmp-port-unreachable
REJECT all — ubuntu-dev.sofia-connect.net anywhere reject-with icmp-port-unreachable
REJECT all — 13.84.218.172 anywhere reject-with icmp-port-unreachable
REJECT all — 45.119.154.176 anywhere reject-with icmp-port-unreachable
REJECT all — static.vnpt.vn anywhere reject-with icmp-port-unreachable
REJECT all — ec2-52-37-48-252.us-west-2.compute.amazonaws.com anywhere reject-with icmp-port-unreachable
REJECT all — 103.207.39.18 anywhere reject-with icmp-port-unreachable
REJECT all — 185.110.132.201 anywhere reject-with icmp-port-unreachable
REJECT all — oisin.gainpromotion.net anywhere reject-with icmp-port-unreachable
REJECT all — 222.186.56.14 anywhere reject-with icmp-port-unreachable
REJECT all — vps07.snthostings.com anywhere reject-with icmp-port-unreachable
REJECT all — 79.96.151.203.sta.inet.co.th anywhere reject-with icmp-port-unreachable
REJECT all — 222.186.21.224 anywhere reject-with icmp-port-unreachable
REJECT all — static-49-107-226-77.ipcom.comunitel.net anywhere reject-with icmp-port-unreachable
REJECT all — dynamic.vdc.vn anywhere reject-with icmp-port-unreachable
REJECT all — ruslango94.zomro.com anywhere reject-with icmp-port-unreachable
REJECT all — host149-173-static.9-188-b.business.telecomitalia.it anywhere reject-with icmp-port-unreachable
REJECT all — wim-luche9.fastnet.it anywhere reject-with icmp-port-unreachable
REJECT all — ec2-52-26-61-71.us-west-2.compute.amazonaws.com anywhere reject-with icmp-port-unreachable
REJECT all — static.vdc.vn anywhere reject-with icmp-port-unreachable
RETURN all — anywhere anywhere

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