When you see a long subdomain like ocsp.alb.gns.gslb.paloaltonetworks.com, it's easy to wonder if it's legitimate. The short answer: yes. This is a backend endpoint operated by Palo Alto Networks, a major cybersecurity company. It handles Online Certificate Status Protocol (OCSP) queries — essentially checking whether digital certificates are still valid. That's a behind-the-scenes service, not a website you'd visit in a browser.
For this kind of infrastructure, many signals that matter for consumer sites simply don't apply. There's no about page, no contact info, and no privacy policy — because none of that is needed for a machine-to-machine service. The domain resolves cleanly, uses DNSSEC for security, and is hosted on Google Cloud. The 403 error you might see if you try to open it in a browser is just the server rejecting non-standard requests, which is expected.
If you're asking whether ocsp.alb.gns.gslb.paloaltonetworks.com is safe, the evidence points to yes. It's part of a reputable company's internal infrastructure. There's no reason to treat it as a scam or a fake — it's simply a technical service doing its job.