Integration Synology DSM is not working

Hi all,

i have one raspberry Pi3 that is running with hassio.
Also in my Nework i have a Synology DSM Verison 6.2.4 running.

I want to integrate now the Synology integration that is now not working any more.
When i want to ping my Synology from my raspberry via SSH it tells me timeout.
All other devices from the PI i can ping without any problem only the Synology NAS not.
All my Devices in the network do not have the issue to connect to the Synology NAS - i can connect via SMB or Web without any problem.
I am running the latest core + os_version see below.
Firewall in Disk Station Manager is disabled.
Does anyone know what could be the issue?

System Health

version: core-2021.7.4
installation_type: Home Assistant OS
dev: false
hassio: true
docker: true
virtualenv: false
python_version: 3.9.5
os_name: Linux
os_version: 5.10.17-v7
arch: armv7l
timezone: Europe/Berlin

logged_in: false
can_reach_cert_server: ok
can_reach_cloud_auth: ok
can_reach_cloud: ok

host_os: Home Assistant OS 6.1
update_channel: stable
supervisor_version: supervisor-2021.06.8
docker_version: 20.10.6
disk_total: 57.8 GB
disk_used: 13.0 GB
healthy: true
supported: true
board: rpi3
supervisor_api: ok
version_api: ok
installed_addons: Samba share (9.3.0), Terminal & SSH (9.1.3), Check Home Assistant configuration (3.8.0), File editor (4.7), Mosquitto broker (5.1), AdGuard Home (4.1.6), Grafana (7.0.1), InfluxDB (4.1.1), Samba Backup (4.5.0)
dashboards: 1
resources: 0
views: 7
mode: storage

from NAS to Raspberry
^[[[email protected]:~$ sudo ping
PING ( 56(84) bytes of data.

from Raspberry to NAS
~ $ ping
PING ( 56 data bytes