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#  
#    http://www.apache.org/licenses/LICENSE-2.0
#    
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# Redirect TCP/IP traffic from one port to another port, useful to handle
# incoming traffic on standard reserved ports like 80 or 443 for example
# in an unprivileged user server process bound to a non-reserved port
# Example: ip-redirect 80 8090 eth0

source=$1
target=$2
if [ "$3" != "" ]; then
    intf=$3
else
    intf="eth0"
fi

sudo /sbin/iptables -t nat -A PREROUTING -i $intf -p tcp --dport $source -j REDIRECT --to-port $target