This subdomain belongs to a CDN infrastructure, but it's not a normal, well-maintained node. The most obvious problem is the SSL certificate: it's valid for other domains, not for this one. That means any connection to u01.gslb.ksyuncdn.com would trigger a browser security warning, making it unusable for legitimate purposes. Even more concerning, the network hosting this subdomain (AS138915) is on Spamhaus's ASN-DROP list, which is reserved for networks that are entirely dedicated to spam, malware, or other abuse. A clean Google Web Risk check doesn't outweigh that. No archive history, no contact info, and a 403 error behind bot protection all point to a site that isn't meant to be accessed by the public. If you're investigating a link or service that directs you here, treat it as a red flag. For a CDN node, proper SSL and a reputable hosting provider are non-negotiable. This one fails on both fronts.
No — u01.gslb.ksyuncdn.com doesn't look safe
In plain English
This subdomain is not safe to interact with. It has an invalid SSL certificate and is hosted on a network that Spamhaus flags as entirely malicious. There is no reason to trust a CDN node that fails basic security checks and runs on a blacklisted provider.
What you should do now
Don't panic. These steps limit the damage, and the sooner you take them the better.
Don't enter any details
No passwords, card numbers or personal information — even if the site looks professional.
Close the tab
Especially if you got here from an email, text message or social media ad.
Already paid? Call your bank
Contact your bank or card provider right away. They can often stop or reverse a recent payment.
Warn others
Report the site and share this check with anyone who sent you the link.
Where the score comes from
The SSL certificate is invalid for this subdomain, and the site is unreachable due to the TLS error. For a CDN node, proper certificate validation is essential; this is a critical failure.
No ownership information is available for this subdomain, and it lacks any branding or about page. While subdomains don't require full identity disclosure, the connection to a legitimate parent domain is unclear.
Although Google Web Risk and DNS blacklists are clean, the hosting network is flagged on Spamhaus ASN-DROP, indicating a history of abuse. No archive history suggests the subdomain is very new or rarely used.
Contact information, about page, and social media presence are absent, but for a backend infrastructure node, transparency is not typically expected. The bot protection further obscures any public face.
No legal pages are present, which is normal for a non-commercial infrastructure subdomain. No compliance obligations apply here.
DNS resolution works, but the site lacks basic security headers, DNSSEC, and email handling. The most concerning signal is the ASN being on a Spamhaus drop list, which strongly suggests the network is used for malicious activity.
What we checked
Think this verdict is wrong?
Site owners can request a fresh scan. Scores update automatically as signals change.