% Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed

  0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0*   Trying 156.0.1.18:443...
* Connected to 156.0.1.18 (156.0.1.18) port 443
* ALPN: curl offers h2,http/1.1
} [5 bytes data]
* TLSv1.3 (OUT), TLS handshake, Client hello (1):
} [512 bytes data]

  0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0* TLSv1.3 (IN), TLS handshake, Server hello (2):
{ [122 bytes data]
* TLSv1.3 (IN), TLS handshake, Encrypted Extensions (8):
{ [15 bytes data]
* TLSv1.3 (IN), TLS handshake, Request CERT (13):
{ [564 bytes data]
* TLSv1.3 (IN), TLS handshake, Unknown (25):
{ [2075 bytes data]
* TLSv1.3 (IN), TLS handshake, CERT verify (15):
{ [79 bytes data]
* TLSv1.3 (IN), TLS handshake, Finished (20):
{ [36 bytes data]
* TLSv1.3 (OUT), TLS change cipher, Change cipher spec (1):
} [1 bytes data]
* TLSv1.3 (OUT), TLS handshake, Certificate (11):
} [8 bytes data]
* TLSv1.3 (OUT), TLS handshake, Finished (20):
} [36 bytes data]
* SSL connection using TLSv1.3 / TLS_CHACHA20_POLY1305_SHA256 / x25519 / id-ecPublicKey
* ALPN: server accepted h2
* Server certificate:
*  subject: C=US; ST=California; L=Menlo Park; O=Meta Platforms, Inc.; CN=*.fmsu2-1.fna.fbcdn.net
*  start date: Dec 20 00:00:00 2024 GMT
*  expire date: Mar 20 23:59:59 2025 GMT
*  issuer: C=US; O=DigiCert Inc; OU=www.digicert.com; CN=DigiCert SHA2 High Assurance Server CA
*  SSL certificate verify result: unable to get local issuer certificate (20), continuing anyway.
*   Certificate level 0: Public key type EC/prime256v1 (256/128 Bits/secBits), signed using sha256WithRSAEncryption
*   Certificate level 1: Public key type RSA (2048/112 Bits/secBits), signed using sha256WithRSAEncryption
} [5 bytes data]
* using HTTP/2
* [HTTP/2] [1] OPENED stream for https://156.0.1.18/
* [HTTP/2] [1] [:method: HEAD]
* [HTTP/2] [1] [:scheme: https]
* [HTTP/2] [1] [:authority: 156.0.1.18]
* [HTTP/2] [1] [:path: /]
* [HTTP/2] [1] [user-agent: curl/8.9.1]
* [HTTP/2] [1] [accept: */*]
} [5 bytes data]
> HEAD / HTTP/2
> Host: 156.0.1.18
> User-Agent: curl/8.9.1
> Accept: */*
> 
* Request completely sent off
{ [5 bytes data]
* TLSv1.3 (IN), TLS alert, unknown (628):
{ [2 bytes data]
* OpenSSL SSL_read: OpenSSL/3.2.2: error:0A00045C:SSL routines::tlsv13 alert certificate required, errno 0
* Failed receiving HTTP2 data: 56(Failure when receiving data from the peer)

  0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0
* Connection #0 to host 156.0.1.18 left intact
curl: (56) OpenSSL SSL_read: OpenSSL/3.2.2: error:0A00045C:SSL routines::tlsv13 alert certificate required, errno 0