Created
August 5, 2024 00:22
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Block Chinese IP Forwarding as VPN Server
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| #!/bin/bash | |
| IP_LIST_URL="https://www.ipdeny.com/ipblocks/data/countries/cn.zone" | |
| IP_LIST_FILE="/tmp/cn.zone" | |
| IPSET_NAME="china_ips" | |
| BLOCK_CHAIN="CHINA_BLOCK" | |
| download_ip_list() { | |
| wget -q -O $IP_LIST_FILE $IP_LIST_URL | |
| if [[ $? -ne 0 ]]; then | |
| echo "Failed to download IP list." | |
| exit 1 | |
| fi | |
| } | |
| enable_block() { | |
| download_ip_list | |
| if ! ipset list $IPSET_NAME > /dev/null 2>&1; then | |
| ipset create $IPSET_NAME hash:net | |
| else | |
| ipset flush $IPSET_NAME | |
| fi | |
| while IFS= read -r ip; do | |
| echo "add $IPSET_NAME $ip" | |
| done < $IP_LIST_FILE | ipset restore -! | |
| if ! iptables -L $BLOCK_CHAIN > /dev/null 2>&1; then | |
| iptables -N $BLOCK_CHAIN | |
| iptables -A $BLOCK_CHAIN -m set --match-set $IPSET_NAME src -j DROP | |
| fi | |
| if ! iptables -C FORWARD -j $BLOCK_CHAIN > /dev/null 2>&1; then | |
| iptables -I FORWARD -j $BLOCK_CHAIN | |
| fi | |
| echo "Blocking Chinese IP addresses enabled." | |
| } | |
| disable_block() { | |
| if iptables -C FORWARD -j $BLOCK_CHAIN > /dev/null 2>&1; then | |
| iptables -D FORWARD -j $BLOCK_CHAIN | |
| fi | |
| if iptables -L $BLOCK_CHAIN > /dev/null 2>&1; then | |
| iptables -F $BLOCK_CHAIN | |
| iptables -X $BLOCK_CHAIN | |
| fi | |
| if ipset list $IPSET_NAME > /dev/null 2>&1; then | |
| ipset destroy $IPSET_NAME | |
| fi | |
| echo "Blocking Chinese IP addresses disabled." | |
| } | |
| case "$1" in | |
| enable) | |
| enable_block | |
| ;; | |
| disable) | |
| disable_block | |
| ;; | |
| *) | |
| echo "Usage: $0 {enable|disable}" | |
| exit 1 | |
| ;; | |
| esac |
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