Don't do this. Surveillance Station is deeply integrated into DSM (Synology’s OS). Cracks often brick the system, break during updates, or introduce malware. Because your NAS holds your personal data, this is a high-risk gamble.
You can add an unlimited number of RTSP streams to a or Home Assistant dashboard. Those streams won’t record, alert, or show in DS cam timeline—but they give you live viewing for free. synology surveillance station license free
The license-free version of Surveillance Station has some limitations: Don't do this