change to iptables

iptables/china-block.service

@@ -0,0 +1,13 @@
+[Unit]
+Description=Block Chinese IP ranges via ipset + iptables
+After=network-online.target
+Wants=network-online.target
+
+[Service]
+Type=oneshot
+RemainAfterExit=yes
+ExecStart=/usr/local/sbin/china-block.sh
+ExecStop=/usr/local/sbin/china-unblock.sh
+
+[Install]
+WantedBy=multi-user.target

iptables/china-block.sh

@@ -0,0 +1,86 @@
+#!/bin/bash
+set -e
+
+IPSET_NAME="china"
+CIDR_FILE="/tmp/cn.cidr"
+
+SOURCES=(
+    "https://www.ipdeny.com/ipblocks/data/countries/cn.zone"
+    "https://raw.githubusercontent.com/mayaxcn/china-ip-list/master/chnroute.txt"
+)
+
+echo "[*] Killing Steam..."
+pkill -9 -f steam || true
+
+echo "[*] Downloading CN IP ranges..."
+for url in "${SOURCES[@]}"; do
+    echo "    Trying $url ..."
+    wget -q "$url" -O "$CIDR_FILE"
+    if [[ $(wc -l < "$CIDR_FILE") -gt 10 ]]; then
+        echo "    [+] Success: $(wc -l < "$CIDR_FILE") entries"
+        break
+    fi
+done
+
+if [[ $(wc -l < "$CIDR_FILE") -lt 10 ]]; then
+    echo "[!] All sources failed. Aborting."
+    exit 1
+fi
+
+echo "[*] Creating ipset..."
+ipset create "$IPSET_NAME" hash:net 2>/dev/null || ipset flush "$IPSET_NAME"
+
+echo "[*] Populating ipset..."
+while IFS= read -r cidr; do
+    [[ -z "$cidr" || "$cidr" == \#* ]] && continue
+    ipset add "$IPSET_NAME" "$cidr" || true
+done < "$CIDR_FILE"
+
+echo "[*] Applying iptables rules..."
+iptables -A INPUT -m set --match-set "$IPSET_NAME" src -j DROP
+iptables -A OUTPUT -m set --match-set "$IPSET_NAME" dst -j DROP
+
+echo "[*] Applying raw table rules (block UDP hole punch)..."
+iptables -t raw -A PREROUTING -m set --match-set "$IPSET_NAME" src -j DROP
+iptables -t raw -A OUTPUT -m set --match-set "$IPSET_NAME" dst -j DROP
+
+CIDR6_FILE="/tmp/cn6.cidr"
+SOURCES6=(
+    "https://raw.githubusercontent.com/herrbischoff/country-ip-blocks/master/ipv6/cn.cidr"
+    "https://www.ipdeny.com/ipv6/ipaddresses/blocks/cn.cidr"
+)
+
+echo "[*] Downloading CN IPv6 ranges..."
+for url in "${SOURCES6[@]}"; do
+    echo "    Trying $url ..."
+    wget -q "$url" -O "$CIDR6_FILE"
+    if [[ $(wc -l < "$CIDR6_FILE") -gt 10 ]]; then
+        echo "    [+] Success: $(wc -l < "$CIDR6_FILE") entries"
+        break
+    fi
+done
+
+if [[ $(wc -l < "$CIDR6_FILE") -lt 10 ]]; then
+    echo "[!] All IPv6 sources failed. Skipping IPv6 blocking."
+else
+    ipset create china6 hash:net family inet6 2>/dev/null || ipset flush china6
+    while IFS= read -r cidr; do
+        [[ -z "$cidr" || "$cidr" == \#* ]] && continue
+        ipset add china6 "$cidr" || true
+    done < "$CIDR6_FILE"
+
+    ip6tables -A INPUT -m set --match-set china6 src -j DROP
+    ip6tables -A OUTPUT -m set --match-set china6 dst -j DROP
+    ip6tables -t raw -A PREROUTING -m set --match-set china6 src -j DROP
+    ip6tables -t raw -A OUTPUT -m set --match-set china6 dst -j DROP
+fi
+
+echo "[*] Saving rules..."
+mkdir -p /etc/iptables
+ipset save > /etc/ipset.conf
+iptables-save > /etc/iptables/iptables.rules
+ip6tables-save > /etc/iptables/ip6tables.rules
+systemctl enable --now iptables
+systemctl enable --now ip6tables 2>/dev/null || true
+
+echo "[+] Done! Chinese IPs are now blocked."

iptables/china-unblock.sh

@@ -0,0 +1,28 @@
+#!/bin/bash
+set -e
+
+IPSET_NAME="china"
+
+echo "[*] Removing iptables rules..."
+iptables -D INPUT -m set --match-set "$IPSET_NAME" src -j DROP 2>/dev/null || true
+iptables -D OUTPUT -m set --match-set "$IPSET_NAME" dst -j DROP 2>/dev/null || true
+
+echo "[*] Removing raw table rules..."
+iptables -t raw -D PREROUTING -m set --match-set "$IPSET_NAME" src -j DROP 2>/dev/null || true
+iptables -t raw -D OUTPUT -m set --match-set "$IPSET_NAME" dst -j DROP 2>/dev/null || true
+
+echo "[*] Removing ip6tables rules..."
+ip6tables -D INPUT -m set --match-set china6 src -j DROP 2>/dev/null || true
+ip6tables -D OUTPUT -m set --match-set china6 dst -j DROP 2>/dev/null || true
+ip6tables -t raw -D PREROUTING -m set --match-set china6 src -j DROP 2>/dev/null || true
+ip6tables -t raw -D OUTPUT -m set --match-set china6 dst -j DROP 2>/dev/null || true
+
+echo "[*] Destroying ipsets..."
+ipset destroy "$IPSET_NAME" 2>/dev/null || true
+ipset destroy china6 2>/dev/null || true
+rm -f /etc/ipset.conf /tmp/cn.cidr /tmp/cn6.cidr
+
+echo "[*] Clearing saved rules..."
+rm -f /etc/iptables/iptables.rules /etc/iptables/ip6tables.rules
+
+echo "[+] Done! Chinese IPs are now unblocked."

iptables/install.sh

@@ -0,0 +1,10 @@
+#!/bin/bash
+set -e
+
+install -m 755 china-block.sh   /usr/local/sbin/china-block.sh
+install -m 755 china-unblock.sh /usr/local/sbin/china-unblock.sh
+install -m 644 china-block.service /etc/systemd/system/china-block.service
+
+systemctl daemon-reload
+systemctl enable --now china-block
+echo "[+] china-block service installed and started."

iptables/requirements.txt

@@ -0,0 +1,3 @@
+ipset
+wget
+ufw