cnc.quickconnect.cn appears to be a backend service related to Synology's QuickConnect, which provides remote access to network-attached storage devices. But instead of a functional portal or login page, the site simply returns a 403 Forbidden error and blocks all automated inspection. For a service that handles remote connections, that's an odd combination.
Most legitimate remote-access services make their company identity and privacy practices clear — you can usually find a contact page, a legal disclaimer, and some documentation. Here, none of that exists. The domain is less than a year old, the WHOIS info is hidden, and there's no record of this site in the Wayback Machine. The SSL certificate is valid but the server still allows obsolete encryption methods that modern browsers have rejected for years.
Is cnc.quickconnect.cn a scam? We can't say for certain — but the lack of transparency and basic security hygiene is a real concern. If you're considering using this for remote access, you'd be better off with a well-known alternative where the operator is clearly identified and the service has a proven track record.