From c89bbb1fa060f0be93071f8a2a5c7702e04c45f3 Mon Sep 17 00:00:00 2001
From: Randall <randall@randallanjie.com>
Date: Mon, 18 Nov 2024 16:23:47 +0800
Subject: [PATCH] =?UTF-8?q?=E6=B7=BB=E5=8A=A0=20port=5Fforward/port=5Fforw?=
 =?UTF-8?q?ard.sh?=
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---
 port_forward/port_forward.sh | 31 +++++++++++++++++++++++++++++++
 1 file changed, 31 insertions(+)
 create mode 100644 port_forward/port_forward.sh

diff --git a/port_forward/port_forward.sh b/port_forward/port_forward.sh
new file mode 100644
index 0000000..8f9a4c5
--- /dev/null
+++ b/port_forward/port_forward.sh
@@ -0,0 +1,31 @@
+#!/bin/bash
+
+# Function to add port forwarding rule
+add_port_forwarding() {
+    local protocol=$1
+    local src_port=$2
+    local dest_ip=$3
+    local dest_port=$4
+
+    # Add the port forwarding rule
+    iptables -t nat -A PREROUTING -p tcp --dport $src_port -j DNAT --to-destination $dest_ip:$dest_port
+    iptables -t nat -A POSTROUTING -p tcp -d $dest_ip --dport $dest_port -j MASQUERADE
+
+    echo "Port forwarding added: $src_port -> $dest_ip:$dest_port"
+}
+
+# Function to list port forwarding rules
+list_port_forwarding() {
+    echo "Current port forwarding rules:"
+    iptables -t nat -L PREROUTING -n -v --line-numbers
+}
+
+# Main script logic
+if [ "$1" == "add" ] && [ "$2" == "ipv4" ]; then
+    add_port_forwarding "tcp" $3 $4 $5
+elif [ "$1" == "list" ]; then
+    list_port_forwarding
+else
+    echo "Usage: $0 add ipv4 <src_port> <dest_ip> <dest_port>"
+    echo "       $0 list"
+fi
\ No newline at end of file