SSH Port Forward Mapping

ssh-forward-mappings.sh

ssh.map-port-to-local() {

    local LOCAL_HOST=$SSH_MAP_LOCAL_HOST
    local LOCAL_PORT=$SSH_MAP_LOCAL_PORT

    if [[ -z "$SSH_MAP_REMOTE_SERVER" ]] || [[ -z "$SSH_MAP_REMOTE_PORT" ]]; then
        echo "Usage: z.ssh.map-port-to-local"
        echo "  env export [email protected] [Required]"
        echo "  env export SSH_MAP_REMOTE_PORT=12345                [Required]"
        echo "  env export SSH_MAP_REMOTE_HOST=127.0.0.1            [Default: 127.0.0.1]"
        echo "  env export SSH_MAP_LOCAL_HOST=0.0.0.0               [Default: 127.0.0.1]"
        echo "  env export SSH_MAP_LOCAL_PORT=23456                 [Default: \$SSH_MAP_REMOTE_PORT]"
        echo "  env export SSH_KEY_FILE=xxx.pem                     [Default: null]"
        return 1
    fi

    if [[ -z "$LOCAL_HOST" ]]; then
        LOCAL_HOST=127.0.0.1
    fi

    if [[ -z "$LOCAL_PORT" ]]; then
        LOCAL_PORT=$SSH_MAP_REMOTE_PORT
    fi

    if [[ -z "$SSH_MAP_REMOTE_HOST" ]]; then
        SSH_MAP_REMOTE_HOST=127.0.0.1
    fi

    if [[ ! -z "$SSH_KEY_FILE" ]]; then
        SSH_KEY_FILE_ARGS="-i $SSH_KEY_FILE"
    fi

    echo "Mapping $SSH_MAP_REMOTE_HOST:$SSH_MAP_REMOTE_PORT on $SSH_MAP_REMOTE_SERVER [Remote] -> $LOCAL_HOST:$LOCAL_PORT [Local]"

    ssh \
        -o StrictHostKeyChecking=no \
        -4 \
        $SSH_KEY_FILE_ARGS \
        $SSH_MAP_REMOTE_SERVER \
        -N \
        -L $LOCAL_HOST:$LOCAL_PORT:$SSH_MAP_REMOTE_HOST:$SSH_MAP_REMOTE_PORT
}