autossh.tunnel.sh

#!/usr/bin/env bash
set -o errexit
set -o nounset
set -o pipefail

# Array of hosts:port Port is the local port to be forwarded as Socks5
SOCKS5_HOSTS=('bastion-1.something.com:1080' 'bastion2-something.com:1081' )
SSH_MONITOR_PORT_BASE=20000
AUTOSSH_PATH='/usr/local/bin'
PATH="${PATH}:${AUTOSSH_PATH}"

for ((i = 0; i < ${#SOCKS5_HOSTS[@]}; i++)); do
  host=$(echo ${SOCKS5_HOSTS[$i]} | cut -d ':' -f 1)
  port=$(echo ${SOCKS5_HOSTS[$i]} | cut -d ':' -f 2)
  monitor_port=$(($SSH_MONITOR_PORT_BASE + $i*2))
  echo $(date) Running: autossh -f -M ${monitor_port} -D${port} ${host} -N ssh
  autossh -f -M ${monitor_port} -D${port} ${host} -N ssh 2>&1
done