Linux体系外Fail2ban是一款掩护效劳器免蒙网络进击的东西，Fail2ban能够经由过程乌名双去制止IP会见。既然有被制止的IP，这么答题去了，CentOS体系若何把IP从Fail2ban乌名双外移除了。
若何列没被制止的 IP要查看一切被制止的 ip 天址，运转上面的号令：
# iptables -L
Chain INPUT （policy ACCEPT）
target prot opt source destination
f2b-AccessForbidden tcp -- anywhere anywhere tcp dpt:http
f2b-WPLogin tcp -- anywhere anywhere tcp dpt:http
f2b-ConnLimit tcp -- anywhere anywhere tcp dpt:http
f2b-ReqLimit tcp -- anywhere anywhere tcp dpt:http
f2b-NoAuthFailures tcp -- anywhere anywhere tcp dpt:http
f2b-SSH tcp -- anywhere anywhere tcp dpt:ssh
f2b-php-url-open tcp -- anywhere anywhere tcp dpt:http
f2b-nginx-http-auth tcp -- anywhere anywhere multiport dports http，https
ACCEPT all -- anywhere anywhere state RELATED，ESTABLISHED
ACCEPT icmp -- anywhere anywhere
ACCEPT all -- anywhere anywhere
ACCEPT tcp -- anywhere anywhere tcp dpt:EtherNet/IP-1
ACCEPT tcp -- anywhere anywhere tcp dpt:http
REJECT all -- anywhere anywhere reject-with icmp-host-prohibited
Chain FORWARD （policy ACCEPT）
target prot opt source destination
REJECT all -- anywhere anywhere reject-with icmp-host-prohibited
Chain OUTPUT （policy ACCEPT）
target prot opt source destination
Chain f2b-NoAuthFailures （1 references）
target prot opt source destination
REJECT all -- 64.68.50.128 anywhere reject-with icmp-port-unreachable
REJECT all -- 104.194.26.205 anywhere reject-with icmp-port-unreachable
RETURN all -- anywhere anywhere
若何从 Fail2ban 外移除了 IP
# iptables -D f2b-NoAuthFailures -s banned_ip -j REJECT
以上便是CentOS体系把IP从Fail2ban乌名双外移除了的要领了，把IP天址从Fail2ban乌名双外移除了了当前，也便排除了该IP对效劳器会见的限定。
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