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+#Fail2ban
+
+##DéBannir un IP
+
+Tout d'abord on affiche le listing de toute les régles iptables avec la commande :
+
+
+```bash
+root@beudi:~# iptables -L --line-numbers
+Chain INPUT (policy ACCEPT)
+num  target     prot opt source               destination         
+1    fail2ban-yunohost  tcp  --  anywhere             anywhere             multiport dports http,https
+2    fail2ban-nginx  tcp  --  anywhere             anywhere             multiport dports http,https
+3    fail2ban-dovecot  tcp  --  anywhere             anywhere             multiport dports smtp,ssmtp,imap2,imap3,imaps,pop3,pop3s
+4    fail2ban-sasl  tcp  --  anywhere             anywhere             multiport dports smtp,ssmtp,imap2,imap3,imaps,pop3,pop3s
+5    fail2ban-ssh  tcp  --  anywhere             anywhere             multiport dports ssh
+
+Chain FORWARD (policy ACCEPT)
+num  target     prot opt source               destination         
+
+Chain OUTPUT (policy ACCEPT)
+num  target     prot opt source               destination         
+
+Chain fail2ban-dovecot (1 references)
+num  target     prot opt source               destination         
+1    RETURN     all  --  anywhere             anywhere            
+
+Chain fail2ban-nginx (1 references)
+num  target     prot opt source               destination         
+1    RETURN     all  --  anywhere             anywhere            
+
+Chain fail2ban-sasl (1 references)
+num  target     prot opt source               destination         
+1    RETURN     all  --  anywhere             anywhere            
+
+Chain fail2ban-ssh (1 references)
+num  target     prot opt source               destination         
+1    RETURN     all  --  anywhere             anywhere            
+
+Chain fail2ban-yunohost (1 references)
+num  target     prot opt source               destination         
+1    DROP       all  --  80.215.197.201       anywhere            
+2    RETURN     all  --  anywhere             anywhere 
+```
+
+Il nous indique que l'ip 80.215.197.201 est banni dans la règle fail2ban-yunohost. Pour débloquer cette IP il faut faire la commande
+iptables -D nom_de_la_regle numéro_de_l'entré
+
+exemple :
+iptables -D fail2ban-yunohost 1