or download this
REMOTE_SERVER="server-to-reach.some.where";
SSH_HOST="server-with-ssh-access.some.where";
...
USER="you-over-there"
sudo echo "$LOCAL_ADDR $REMOTE_SERVER" >> /etc/hosts # Only once eve
+r
sudo ssh -A -L $LOCAL_ADDR:$LOCAL_PORT:$REMOTE_SERVER:$REMOTE_PORT $US
+ER@$SSH_HOST