REMOTE_SERVER="server-to-reach.some.where";
SSH_HOST="server-with-ssh-access.some.where";
LOCAL_ADDR=127.0.0.2
LOCAL_PORT=80
REMOTE_PORT=80
USER="you-over-there"
sudo echo "$LOCAL_ADDR $REMOTE_SERVER" >> /etc/hosts   # Only once ever
sudo ssh -A -L $LOCAL_ADDR:$LOCAL_PORT:$REMOTE_SERVER:$REMOTE_PORT $USER@$SSH_HOST