$ curl -v letsdecrypt.org * Host letsdecrypt.org:80 was resolved. * IPv6: (none) * IPv4: 62.116.130.8 * Trying 62.116.130.8:80... * Connected to letsdecrypt.org (62.116.130.8) port 80 * using HTTP/1.x > GET / HTTP/1.1 > Host: letsdecrypt.org > User-Agent: curl/8.14.1 > Accept: */* > * Request completely sent off < HTTP/1.1 301 Moved Permanently < Server: nginx < Date: Wed, 10 Dec 2025 15:20:48 GMT < Content-Type: text/html; charset=UTF-8 < Transfer-Encoding: chunked < Connection: keep-alive < X-Redirector-ID: 14c2d856bcd2de3beae30791793b40ae43db49fc9ea482a825177a36e20108c4 < Location: http://www.nsa.gov/ < IX-Cache-Status: MISS < * Connection #0 to host letsdecrypt.org left intact
Edit: Ah, over HTTPS protocol it doesn't respond.
$ curl -v https://letsdecrypt.org * Host letsdecrypt.org:443 was resolved. * IPv6: (none) * IPv4: 62.116.130.8 * Trying 62.116.130.8:443...
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