ipblock-unblock by centos

-- IP Block / UNBlock by iptables in centos

root@localhost log]# iptables -I INPUT -s 116.31.116.6 -j DROP
[root@localhost log]# 
[root@localhost log]# !tail
tail -f secure
Aug  1 20:34:55 localhost sshd[16720]: pam_succeed_if(sshd:auth): requirement "uid >= 1000" not met by user "root"
Aug  1 20:34:57 localhost sshd[16720]: Failed password for root from 116.31.116.6 port 61677 ssh2
Aug  1 20:34:58 localhost unix_chkpwd[16723]: password check failed for user (root)
Aug  1 20:34:58 localhost sshd[16720]: pam_succeed_if(sshd:auth): requirement "uid >= 1000" not met by user "root"
Aug  1 20:34:59 localhost sshd[16720]: Failed password for root from 116.31.116.6 port 61677 ssh2
Aug  1 20:34:59 localhost unix_chkpwd[16724]: password check failed for user (root)
Aug  1 20:34:59 localhost sshd[16720]: pam_succeed_if(sshd:auth): requirement "uid >= 1000" not met by user "root"
 

^C
[root@localhost log]# iptables -D INPUT -s 192.168.1.100 -j DROP
[root@localhost log]# iptables -L
Chain INPUT (policy ACCEPT)
target     prot opt source               destination         
DROP       all  --  116.31.116.6         anywhere            
ACCEPT     udp  --  anywhere             anywhere             udp dpt:domain
ACCEPT     tcp  --  anywhere             anywhere             tcp dpt:domain
ACCEPT     udp  --  anywhere             anywhere             udp dpt:bootps
ACCEPT     tcp  --  anywhere             anywhere             tcp dpt:bootps
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
DROP       all  --  116.31.116.6         anywhere