Snippet revisions — Bitbucket

+#!/bin/bash

+function del_forwarding_rules()

+{

+    host_port=$1

+    dest_ip=$2

+    dest_port=$3

+    iptables -D PREROUTING  -t nat -p tcp --dport $host_port -j DNAT --to $dest_ip:$dest_port

+    iptables -D FORWARD  -p tcp -d $dest_ip --dport $dest_port -j ACCEPT

+}

+function set_forwarding_rules()

+{

+    host_port=$1

+    dest_ip=$2

+    dest_port=$3

+    iptables -I PREROUTING 1 -t nat -p tcp --dport $host_port -j DNAT --to $dest_ip:$dest_port

+    iptables -I FORWARD 1 -p tcp -d $dest_ip --dport $dest_port -j ACCEPT

+}

+if [[ -n "$1" ]]; then

+    IFS=":" read host_port dest_ip dest_port <<< $1

+    echo "host_port=$host_port dest_ip=$dest_ip dest_port=$dest_port"

+    del_forwarding_rules $host_port $dest_ip $dest_port

+    set_forwarding_rules $host_port $dest_ip $dest_port

+    exit 0

+else

+    echo "Usage $0: host_port:dest_ip:dest_port"

+    echo "E.g. $0 9000:192.168.122.50:80 will setup forwarding from host's port 9000 to port 80 on internal ip 192.168.122.50"

+fi

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