原创 安全
[root@localhost~]# vi /etc/iptables_settings.sh
#################################################################
#!/bin/sh -e
#———————————————————-
# iptables settings
#———————————————————-
#Connection IP address
SSH_IP1="192.168.1.0/24"
SSH_IP2="192.168.2.0/24"
SNMP_IP1="10.10.1.1"
SNMP_IP2="10.10.2.1"
#———————-Standard part—————————
# Stop iptables service first
#service iptables stop
/sbin/iptables -F
/sbin/iptables -X
/sbin/iptables -Z
# Inital chains default policy
/sbin/iptables -F -t filter
/sbin/iptables -P INPUT DROP
/sbin/iptables -P OUTPUT ACCEPT
# Enable Native Network Transfer
/sbin/iptables -A INPUT -i lo -j ACCEPT
# Accept Established Connections
/sbin/iptables -A INPUT -m state –state ESTABLISHED,RELATED -j ACCEPT
# ICMP Control
/sbin/iptables -A INPUT -p icmp -m limit –limit 1/s –limit-burst 10 -j ACCEPT
# SSH Service
/sbin/iptables -A INPUT -s $SSH_IP1 -p tcp –dport 22 -j ACCEPT
/sbin/iptables -A INPUT -s $SSH_IP2 -p tcp –dport 22 -j ACCEPT
# SNMP Service
/sbin/iptables -A INPUT -s $SNMP_IP1 -p udp –dport 161 -j ACCEPT
/sbin/iptables -A INPUT -s $SNMP_IP2 -p udp –dport 161 -j ACCEPT
#———————–Custom part———————–
# Name Service
/sbin/iptables -A INPUT -p tcp –dport 53 -j ACCEPT
/sbin/iptables -A INPUT -p udp –dport 53 -j ACCEPT
此处增加自定义的内容
#deny all Service
/sbin/iptables -A INPUT -j REJECT –reject-with icmp-host-prohibited
/sbin/iptables -A FORWARD -j REJECT –reject-with icmp-host-prohibited
#################################################################
[root@localhost~]# chmod +x /etc/iptables_settings.sh
[root@localhost~]# echo "/etc/iptables_settings.sh">>/etc/rc.local
[root@localhost~]# chkconfig iptables off
[root@localhost~]# service iptables stop
[root@localhost~]# /etc/iptables_settings.sh
[root@localhost~]# iptables -L
