Client Information
Checks the source IP and selected request headers visible to the application.
Tools / Network Check
Network Check
A read-only public page for checking publicly available DNS, TLS, HTTP, and mail-related DNS information from outside the target, and for reading the results.
Safety boundary
Network Check does not change target system configuration or data. It is not a vulnerability scanner, penetration-testing service, port scanner, authentication-testing service, or mail-sending service.
Public scope
Individual checks
Individual checks including Domain, DNS Timing, TLS, HTTP/2, Security Headers, MX, SPF, DMARC, PTR, and CAA.
Domain Multi Check
Grouped checks for the same domain, covering DNS, CAA, mail-related DNS, TLS, HTTP/2, and IPv4 / IPv6 Preference.
Explanation pages
Public explanation pages for reading results, covering DNS, IPv4 / IPv6, TLS, HTTP status, and Security Headers.
Current public state
At /tools/nc/, Network Check actually runs in line with the public scope above, and individual checks and Domain Multi Check can be executed dynamically.
What this osiix.com repository manages is the navigation and copy, matched to OSIIX's existing structure and CSS; the check execution itself is handled by a separately running application service.
Reading the results
Results are observations visible from outside at the time of execution. They can vary with the DNS resolver, network path, target response, and execution environment.
A displayed record, certificate, protocol, or header alone cannot guarantee the overall health or safety of the target.