create a ssh tunnel using autossh && random from ~/.ssh/config

proxy.sh

#!/bin/bash

# ssh user config (http://www.openbsd.org/cgi-bin/man.cgi?query=ssh_config)
SSH_CONFIG=~/.ssh/config

# local port
PORT=8888

# array with hosts from SSH_CONFIG. 
# append "#socks5" at the end of the Host line.
# Example: "Host yourHost #socks5"
eval HOSTS=( $(awk '/^Host(.*?)#socks5$/ {print $2}' ${SSH_CONFIG}) )
#HOSTS=(weidmann-prod)

N=1
for index in `shuf --input-range=0-$(( ${#HOSTS[*]} - 1 )) | head -${N}`
do
   echo -en "Host: ${HOSTS[$index]} Port: ${PORT}\n"
   # using autossh - Automatically restart SSH sessions and tunnels
   AUTOSSH_DEBUG=1
   AUTOSSH_GATETIME=0
   autossh -M 20000 -N -D ${PORT} ${HOSTS[$index]}
done