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@@ -5,7 +5,6 @@ set -euo pipefail
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# Config
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# ----------------------------
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MIHOMO_UID="mihomo"
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REDIR_PORT="7892" # mihomo redir-port (NAT REDIRECT for TCP)
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TPROXY_PORT="7893" # mihomo tproxy-port (TPROXY for TCP/UDP)
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FW_MARK="0x1"
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@@ -19,129 +18,132 @@ EXCLUDE_IFACES=("tun0" "wg0")
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# ----------------------------
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ipt() { iptables "$@"; }
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del_jump_all() {
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local table="$1" chain="$2" target="$3"
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# Delete all rules in $chain that jump to $target (repeat until none left)
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while iptables -t "$table" -C "$chain" -j "$target" 2>/dev/null; do
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iptables -t "$table" -D "$chain" -j "$target"
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done
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}
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del_jump_iface_all() {
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local table="$1" chain="$2" iface="$3" target="$4"
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while iptables -t "$table" -C "$chain" -i "$iface" -j "$target" 2>/dev/null; do
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iptables -t "$table" -D "$chain" -i "$iface" -j "$target"
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# Функция для удаления правил по комментарию (чтобы не тереть чужое)
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# Используем trick: добавляем комментарий ко всем правилам, чтобы потом их найти и удалить
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cleanup_rules() {
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local table="$1"
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local chain="$2"
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local comment="$3"
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# List rules with line numbers, grep by comment, sort reverse order (to delete safely), delete
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iptables -t "$table" -nL "$chain" --line-numbers 2>/dev/null | \
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grep "$comment" | \
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sort -r | \
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awk '{print $1}' | \
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while read -r line; do
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echo "Deleting rule $line from $table/$chain..."
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iptables -t "$table" -D "$chain" "$line"
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done
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}
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ensure_ip_rule() {
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# Remove duplicates if any (doesn't error if absent)
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# Clean up ip rules first
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while ip rule list | grep -q "fwmark ${FW_MARK} lookup ${ROUTE_TABLE}"; do
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ip rule del fwmark ${FW_MARK} lookup ${ROUTE_TABLE} || true
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done
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ip rule add fwmark ${FW_MARK} lookup ${ROUTE_TABLE}
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# Route table entry, forced
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ip route replace local 0.0.0.0/0 dev lo table ${ROUTE_TABLE}
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}
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# ----------------------------
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# NAT (REDIRECT) part (TCP only)
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# CLEANUP PHASE
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# ----------------------------
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echo "Cleaning up old rules..."
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# Cleanup old chains (ignore if absent)
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ipt -t nat -F MIHOMO_REDIR 2>/dev/null || true
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ipt -t nat -X MIHOMO_REDIR 2>/dev/null || true
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# 1. Clean MANGLE references
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cleanup_rules mangle OUTPUT "MIHOMO-MARK"
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cleanup_rules mangle OUTPUT "MIHOMO-EXCLUDE"
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cleanup_rules mangle PREROUTING "MIHOMO-JUMP"
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cleanup_rules mangle PREROUTING "MIHOMO-EXCLUDE"
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# NOTE: Your original script flushes OUTPUT table nat globally.
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# Keeping behavior to match your current approach, but yes, it nukes other rules.
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ipt -t nat -F OUTPUT 2>/dev/null || true
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# 2. Clean NAT references
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cleanup_rules nat OUTPUT "MIHOMO-JUMP"
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cleanup_rules nat OUTPUT "MIHOMO-EXCLUDE"
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cleanup_rules nat PREROUTING "MIHOMO-REDIRECT"
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del_jump_all nat OUTPUT MIHOMO_REDIR
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# Create chain
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ipt -t nat -N MIHOMO_REDIR
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# Exclude loopback and local subnets
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# ipt -t nat -A MIHOMO_REDIR -d 127.0.0.0/8 -j RETURN
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# ipt -t nat -A MIHOMO_REDIR -d 10.0.0.0/8 -j RETURN
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# ipt -t nat -A MIHOMO_REDIR -d 172.16.0.0/12 -j RETURN
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ipt -t nat -A MIHOMO_REDIR -d 192.168.0.0/16 -j RETURN
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# Exclude traffic that is going via tun0/wg0 (your "do not touch" tunnels)
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for IFACE in "${EXCLUDE_IFACES[@]}"; do
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ipt -t nat -A OUTPUT -o "${IFACE}" -j RETURN 2>/dev/null || true
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done
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# Exclude mihomo's own traffic by UID
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ipt -t nat -C OUTPUT -m owner --uid-owner "${MIHOMO_UID}" -j RETURN 2>/dev/null || \
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ipt -t nat -I OUTPUT -m owner --uid-owner "${MIHOMO_UID}" -j RETURN
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# Everything else TCP -> REDIRECT to mihomo
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ipt -t nat -A MIHOMO_REDIR -p tcp -j REDIRECT --to-ports "${REDIR_PORT}"
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# Apply to local OUTPUT TCP
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ipt -t nat -C OUTPUT -p tcp -j MIHOMO_REDIR 2>/dev/null || \
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ipt -t nat -A OUTPUT -p tcp -j MIHOMO_REDIR
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# Apply to traffic coming from NetBird interface (ingress)
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# Exclude tun0/wg0 by design: only target wt0 here.
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ipt -t nat -C PREROUTING -i wt0 -p tcp -j REDIRECT --to-port "${REDIR_PORT}" 2>/dev/null || \
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ipt -t nat -A PREROUTING -i wt0 -p tcp -j REDIRECT --to-port "${REDIR_PORT}"
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# IMPORTANT:
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# Removed your old rule "PREROUTING -i wg0 ... REDIRECT"
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# because you explicitly asked to exclude wg0 from routing/interception.
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# ----------------------------
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# MANGLE (TPROXY) part (TCP+UDP typically)
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# ----------------------------
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ensure_ip_rule
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# Cleanup old chains
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# 3. Flush and Delete Chains
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# Now that references are gone, we can safely kill the chains
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ipt -t mangle -F MIHOMO_TPROXY 2>/dev/null || true
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ipt -t mangle -X MIHOMO_TPROXY 2>/dev/null || true
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del_jump_iface_all mangle PREROUTING wt0 MIHOMO_TPROXY
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ipt -t nat -F MIHOMO_REDIR 2>/dev/null || true
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ipt -t nat -X MIHOMO_REDIR 2>/dev/null || true
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# ----------------------------
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# NAT (REDIRECT) part (TCP only)
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# ----------------------------
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echo "Applying NAT rules..."
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ipt -t nat -N MIHOMO_REDIR
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# Exclude private networks
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ipt -t nat -A MIHOMO_REDIR -d 192.168.0.0/16 -j RETURN
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ipt -t nat -A MIHOMO_REDIR -d 10.0.0.0/8 -j RETURN
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ipt -t nat -A MIHOMO_REDIR -d 172.16.0.0/12 -j RETURN
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ipt -t nat -A MIHOMO_REDIR -d 127.0.0.0/8 -j RETURN
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# Everything else TCP -> REDIRECT
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ipt -t nat -A MIHOMO_REDIR -p tcp -j REDIRECT --to-ports "${REDIR_PORT}"
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# --- APPLY TO OUTPUT (Local Traffic) ---
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# Exclude traffic going via tunnels (tun0/wg0)
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for IFACE in "${EXCLUDE_IFACES[@]}"; do
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ipt -t nat -A OUTPUT -o "${IFACE}" -m comment --comment "MIHOMO-EXCLUDE" -j RETURN
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done
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# Exclude mihomo user
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ipt -t nat -A OUTPUT -m owner --uid-owner "${MIHOMO_UID}" -m comment --comment "MIHOMO-EXCLUDE" -j RETURN
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# Redirect remaining TCP
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ipt -t nat -A OUTPUT -p tcp -m comment --comment "MIHOMO-JUMP" -j MIHOMO_REDIR
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# --- APPLY TO INGRESS (wt0) ---
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# Exclude wt0 -> tun0/wg0 logic handled by routing mostly, but let's be safe if needed.
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# For now, strictly redirect TCP incoming on wt0
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ipt -t nat -A PREROUTING -i wt0 -p tcp -m comment --comment "MIHOMO-REDIRECT" -j REDIRECT --to-port "${REDIR_PORT}"
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# ----------------------------
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# MANGLE (TPROXY) part (TCP+UDP)
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# ----------------------------
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echo "Applying TPROXY rules..."
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ensure_ip_rule
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# Create chain
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ipt -t mangle -N MIHOMO_TPROXY
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# Exclusions: loopback/local subnets
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ipt -t mangle -A MIHOMO_TPROXY -d 127.0.0.0/8 -j RETURN
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# Exclude private networks
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ipt -t mangle -A MIHOMO_TPROXY -d 192.168.0.0/16 -j RETURN
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ipt -t mangle -A MIHOMO_TPROXY -d 10.0.0.0/8 -j RETURN
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ipt -t mangle -A MIHOMO_TPROXY -d 172.16.0.0/12 -j RETURN
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ipt -t mangle -A MIHOMO_TPROXY -d 192.168.0.0/16 -j RETURN
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# Exclude traffic arriving from tun0/wg0 (ingress side)
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for IFACE in "${EXCLUDE_IFACES[@]}"; do
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ipt -t mangle -A PREROUTING -i "${IFACE}" -j RETURN 2>/dev/null || true
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done
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# Exclude traffic leaving via tun0/wg0 (local OUTPUT side)
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for IFACE in "${EXCLUDE_IFACES[@]}"; do
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ipt -t mangle -C OUTPUT -o "${IFACE}" -j RETURN 2>/dev/null || \
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ipt -t mangle -I OUTPUT -o "${IFACE}" -j RETURN
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done
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# Exclude mihomo's own traffic (OUTPUT) so it doesn't eat itself
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ipt -t mangle -C OUTPUT -m owner --uid-owner "${MIHOMO_UID}" -j RETURN 2>/dev/null || \
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ipt -t mangle -I OUTPUT -m owner --uid-owner "${MIHOMO_UID}" -j RETURN
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# --- TPROXY for local VM traffic (OUTPUT) ---
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# Mark TCP/UDP so policy routing sends them to lo (where mihomo tproxy listens)
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ipt -t mangle -C OUTPUT -p tcp -j MARK --set-mark "${FW_MARK}" 2>/dev/null || \
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ipt -t mangle -A OUTPUT -p tcp -j MARK --set-mark "${FW_MARK}"
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ipt -t mangle -C OUTPUT -p udp -j MARK --set-mark "${FW_MARK}" 2>/dev/null || \
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ipt -t mangle -A OUTPUT -p udp -j MARK --set-mark "${FW_MARK}"
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# --- TPROXY for wt0 ingress traffic (PREROUTING) ---
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# First run through our exclusions, then TPROXY it.
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ipt -t mangle -C PREROUTING -i wt0 -j MIHOMO_TPROXY 2>/dev/null || \
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ipt -t mangle -A PREROUTING -i wt0 -j MIHOMO_TPROXY
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ipt -t mangle -A MIHOMO_TPROXY -d 127.0.0.0/8 -j RETURN
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# TPROXY Target
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ipt -t mangle -A MIHOMO_TPROXY -p tcp -j TPROXY --on-port "${TPROXY_PORT}" --tproxy-mark "${FW_MARK}/${FW_MARK}"
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ipt -t mangle -A MIHOMO_TPROXY -p udp -j TPROXY --on-port "${TPROXY_PORT}" --tproxy-mark "${FW_MARK}/${FW_MARK}"
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# --- APPLY TO OUTPUT (Local Traffic) ---
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# Exclude tunnels
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for IFACE in "${EXCLUDE_IFACES[@]}"; do
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ipt -t mangle -A OUTPUT -o "${IFACE}" -m comment --comment "MIHOMO-EXCLUDE" -j RETURN
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done
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# Exclude mihomo user
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ipt -t mangle -A OUTPUT -m owner --uid-owner "${MIHOMO_UID}" -m comment --comment "MIHOMO-EXCLUDE" -j RETURN
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# Mark remaining traffic for Policy Routing
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ipt -t mangle -A OUTPUT -p tcp -m comment --comment "MIHOMO-MARK" -j MARK --set-mark "${FW_MARK}"
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ipt -t mangle -A OUTPUT -p udp -m comment --comment "MIHOMO-MARK" -j MARK --set-mark "${FW_MARK}"
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# --- APPLY TO INGRESS (wt0) ---
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# Exclude tunnels (ingress logic)
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for IFACE in "${EXCLUDE_IFACES[@]}"; do
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ipt -t mangle -A PREROUTING -i "${IFACE}" -m comment --comment "MIHOMO-EXCLUDE" -j RETURN
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done
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# Jump wt0 traffic to TPROXY chain
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ipt -t mangle -A PREROUTING -i wt0 -m comment --comment "MIHOMO-JUMP" -j MIHOMO_TPROXY
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echo "Done."
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