Shell script to force Tor exit node change

tor-change-exitnode

#!/bin/sh
###
#
# Change Tor exit node
#
# Sometimes when using Tor you'd like to change the IP address that
# servers see when you connect (that is, change your Tor exit node).
# This happens automatically from time to time, but this shell script
# lets you force it.
#
# Add these lines to `/etc/tor/torrc` to enable Tor's control interface:
#   ControlPort 9051
#   HashedControlPassword <hash of password>
# (Use `tor --hash-password <password>` to get a hash of your password.)
# If you want to control a remote Tor (say, running on another host in your LAN)
# it is recommended not to use `ControlListenAddress`. The proper way is to
# make that Tor-daemon bind to localhost (default) and create a tunnel.
# The script uses SSH for this.
#
#
# https://gist.github.com/9667900
#
# This program is free software. It comes without any warranty, to the extent
# permitted by applicable law. You can redistribute it and/or modify it
# under the terms of the Do What The Fuck You Want To Public License, Version 2,
# as published by Sam Hocevar. See http://www.wtfpl.net/ for more details.
#
# -- Kirill Elagin <kirelagin@gmail.com>
#                  http://kir.elagin.me/
###


HOST="localhost"
PORT=9051
LOCALPORT=9051  # Matters only if HOST is not `localhost`
PASSWORD=""  # Better leave it empty

if [ -z "$PASSWORD" ]; then
  echo -n "Tor control password: "
  read -s PASSWORD
  echo
fi

if [ "$HOST" != "localhost" ]; then
  ssh -f -o ExitOnForwardFailure=yes -L "$LOCALPORT:localhost:$PORT" "$HOST" sleep 1
  PORT="$LOCALPORT"
fi

(
nc localhost "$PORT" <<EOF
authenticate "${PASSWORD}"
signal newnym
quit
EOF
) || echo "Connection failed." >&2