1. 安装ipset:
RedHat:
yum install ipset
Debian:
apt-get install ipset
1.2#建表
ipset create china hash:net hashsize 10000 maxelem 1000000
1.3#批量增加中国IP到ipset的china表
cd /root
#以下内容保存成脚本执行即可比如
vim chinaip.sh
输入:
#!/bin/bash
rm -f cn.zone
wget http://www.ipdeny.com/ipblocks/data/countries/cn.zone
for i in `cat cn.zone`
do
ipset add china $i
done
之后
sh chinaip.sh
2. 创建规则文件(vim iptabls.rule):
*filter
:INPUT DROP [0:0]
:FORWARD DROP [0:0]
:OUTPUT ACCEPT [0:0]
-A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT
-A INPUT -m set --match-set china src -p tcp -m tcp --dport 1:65535 -j ACCEPT
-A INPUT -m set --match-set china src -p udp -m udp --dport 1:65535 -j ACCEPT
-A INPUT -p udp -m udp --dport 16384:32768 -j ACCEPT
-A INPUT -p tcp -m tcp --dport 80 -j ACCEPT
-A INPUT -p tcp -m tcp --dport 443 -j ACCEPT
-A INPUT -s 10.0.0.0/8 -j ACCEPT
-A INPUT -s 172.18.0.0/16 -j ACCEPT
-A INPUT -s 192.168.0.0/16 -j ACCEPT
-A INPUT -p icmp -j ACCEPT
-A INPUT -i lo -j ACCEPT
-A OUTPUT -o lo -j ACCEPT
COMMIT
3. 导入规则文件:
# 导入规则文件
iptables-restore < iptabls.rule
# 应用生效 CentOS9 不用下面这个命令即可生效,且无下面这个命令
iptables-apply
4. 查看iptables规则:
root@opensips:~# iptables -L
Chain INPUT (policy DROP)
target prot opt source destination
ACCEPT all -- anywhere anywhere state RELATED,ESTABLISHED
ACCEPT tcp -- anywhere anywhere match-set china src tcp dpts:tcpmux:65535
ACCEPT udp -- anywhere anywhere match-set china src udp dpts:1:65535
ACCEPT udp -- anywhere anywhere udp dpts:16384:32768
ACCEPT all -- 127.0.0.1 anywhere
ACCEPT all -- 10.0.0.0/8 anywhere
ACCEPT all -- 172.18.0.0/16 anywhere
ACCEPT all -- 192.168.0.0/16 anywhere
ACCEPT icmp -- anywhere anywhere
ACCEPT all -- anywhere anywhere
Chain FORWARD (policy DROP)
target prot opt source destination
Chain OUTPUT (policy ACCEPT)
target prot opt source destination
ACCEPT all -- anywhere anywhere
5. 我们需要将数据持久化到 /etc/ipset.conf 这个文件中。
ipset save china > /etc/ipset.conf
ipset restore < /etc/ipset.conf
让服务器重启时,通过脚本在加载 /etc/ipset.conf 中的数据。
chmod +x /etc/rc.d/rc.local
echo "ipset restore < /etc/ipset.conf" >> /etc/rc.d/rc.local
6. 持久化Iptables规则
让服务器重启时,通过脚本在加载 /etc/sysconfig/iptables 中的数据。
# iptables-save > /etc/sysconfig/iptables # 持久化Iptables规则 好像重启无此文件
# echo "/usr/sbin/iptables-restore < /etc/sysconfig/iptables" >> /etc/rc.d/rc.local
chmod +x /etc/rc.d/rc.local
echo "/usr/sbin/iptables-restore < /root/iptabls.rule" >> /etc/rc.d/rc.local