Configure proxies in OSX and open an SSH tunnel

ergo-proxy.sh

# Usage: bash ergo-proxy.sh <on off>
# Hitting ctrl-c while tunneled will exit the tunnel and turn the proxies off

STATE=$1

# Get a list of network services: networksetup -listallnetworkservices
NETWORKSERVICE=Wi-Fi

# Local port
PORT=3128

# Remote host
HOST=localhost

# Remote host port
HOST_PORT=8888

# SSH connection string
CONNECTION="$HOME/.ssh/kp-xxx.pem ubuntu@ec2-X-X-X-X.compute-1.amazonaws.com"

########################################################################

sudo echo 'Sudo Up!'

proxy_on() {
  echo 'Proxy On'
  sudo networksetup -setwebproxy $NETWORKSERVICE $HOST $PORT
  sudo networksetup -setsecurewebproxy $NETWORKSERVICE $HOST $PORT
  ssh -L $PORT:$HOST:$HOST_PORT -N -i $CONNECTION
}

proxy_off() {
  echo 'Proxy Off'
  sudo networksetup -setwebproxystate $NETWORKSERVICE off
  sudo networksetup -setsecurewebproxystate $NETWORKSERVICE off
}

control_c() {
  echo '* Exiting'
  proxy_off
  exit $?
}

trap control_c INT

if [[ $STATE = 'on' || $STATE = '' ]]; then
  proxy_on
elif [[ $STATE = 'off' ]]; then
  proxy_off
fi

Hi, I read your article about set proxy server on aws ec2. However, I followed your article step by step. It still can't establish proxy server.
After this step : ssh -L 3128:localhost:8888 -N -i ~/.ssh/kp-ergo-proxy.pem ubuntu@ec2-184-169-221-31.us-west-1.compute.amazonaws.com
Should I see anything on my terminal ?

Updated url to this article ☝️
https://web.archive.org/web/20160516221257/http://www.frankhq.io/blog/2012/11/14/how-to-setup-a-private-proxy-server-on-ec2-in-under-10-minutes