Linux VPS屏蔽国外IP访问的实战方案

1
mmode=$1
2

3
#下面语句可以单独执行，不需要每次执行都获取网段表
4
#wget -q --timeout=60 -O- 'http://ftp.apnic.net/apnic/stats/apnic/delegated-apnic-latest' | awk -F\| '/CN\|ipv4/ { printf("%s/%d\n", $4, 32-log($5)/log(2)) }' > /root/china_ssr.txt
5

6
CNIP="/root/china_ssr.txt"
7

8
gen_iplist() {
9
        cat <<-EOF
10
                $(cat ${CNIP:=/dev/null} 2>/dev/null)
11
EOF
12
}
13

14
flush_r() {
15
iptables  -F ALLCNRULE 2>/dev/null
16
iptables -D INPUT -p tcp -j ALLCNRULE 2>/dev/null
17
iptables  -X ALLCNRULE 2>/dev/null
18
ipset -X allcn 2>/dev/null
19
}
20

21
mstart() {
22
ipset create allcn hash:net 2>/dev/null
23
ipset -! -R <<-EOF
24
$(gen_iplist | sed -e "s/^/add allcn /")
25
EOF
26

27
iptables -N ALLCNRULE
28
iptables -I INPUT -p tcp -j ALLCNRULE
29
iptables -A ALLCNRULE -s 127.0.0.0/8 -j RETURN
30
iptables -A ALLCNRULE -s 169.254.0.0/16 -j RETURN
31
iptables -A ALLCNRULE -s 224.0.0.0/4 -j RETURN
32
iptables -A ALLCNRULE -s 255.255.255.255 -j RETURN
33
#可在此增加你的公网网段，避免调试ipset时出现自己无法访问的情况
34

35
iptables -A ALLCNRULE -m set --match-set allcn  src -j RETURN
36
iptables -A ALLCNRULE -p tcp -j DROP
37

38
}
39

40
if [ "$mmode" == "stop" ] ;then
41
flush_r
42
exit 0
43
fi
44

45
flush_r
46
sleep 1
47
mstart