48 lines
1.5 KiB
Bash
48 lines
1.5 KiB
Bash
#!/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 delete port forwarding rule
|
|
delete_port_forwarding() {
|
|
local protocol=$1
|
|
local src_port=$2
|
|
local dest_ip=$3
|
|
local dest_port=$4
|
|
|
|
# Delete the port forwarding rule
|
|
iptables -t nat -D PREROUTING -p tcp --dport $src_port -j DNAT --to-destination $dest_ip:$dest_port
|
|
iptables -t nat -D POSTROUTING -p tcp -d $dest_ip --dport $dest_port -j MASQUERADE
|
|
|
|
echo "Port forwarding deleted: $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" == "delete" ] && [ "$2" == "ipv4" ]; then
|
|
delete_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 delete ipv4 <src_port> <dest_ip> <dest_port>"
|
|
echo " $0 list"
|
|
fi |