tunnlr.sh

#!/bin/bash
#
# A simple function for starting an SSH tunnel (e.g. tunnlr.com)
#
# Add the function to your .bashrc file or use this script standalone

# Takes port to forward to as only parameter
function tunnlr(){
  [ -z $1 ] && { echo "You must specify a port to forward to."; return 1; }
  if [ -f ~/.tunnlr ]; then
    source ~/.tunnlr
  else
    read -p "Enter your designated tunnlr.com port (e.g. 12951): " port
    [ -n $port ] || return 1
    read -p "Enter your designated tunnlr.com 'user@host': " host
    [ -n $host ] || return 1
    echo -e "port=$port\nhost=$host" > ~/.tunnlr
  fi
  [ -z $host -o -z $port ] && { echo "Invalid tunnlr config."; rm ~/.tunnlr; return 1; }
  pid=$(pgrep -f "$host")
  [ "$pid" = "" ] || { kill -9 "$pid" && echo "Killed existing tunnel."; }
  if ssh -fNt -g -R :$port:0.0.0.0:$1 $host ; then
    echo "Forwarding SSH port $port on $host to local port $1"
  fi
}

# Ignore this line if pasting the above function in your .bashrc file
tunnlr $1