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The validation is done with the following command: host -t RRSIG <domain>, where <domain> corresponds to the requested domain, already sanitized.
The results are then displayed on top of the records table, showing a white check mark on a green background (✅), or a white cross on a red background (❎), followed, respectively, by DNSSEC OK, or DNSSEC FAIL.
This Middleware, written by me, checks if the incoming IP address comes from a "bad" server (crawlers, scanners, etc.), thanks to AbuseIPDB's /check API endpoint.
When a request is received, the BlockRequest Middleware will check the cache, using the incoming IP as key. If a record is found, check if it is a good IP: if it is, proceed with the request. If it isn't, throw a 403, which will be rendered with a pretty page, regardless.
If no records are found in the cache, BlockRequest queries AbuseIPDB, honoring the user-provided options (see below). If the IP address is whitelisted, check if the user wants to ignore this whitelist; we then check the IP score and, if it is above a certain threshold, the request will be blocked, like the case above, throwing a 403.
