$ ssh ABC.XYZ.ts.net who
user pts/0 2024-05-10 21:48 (100.92.134.25)
$ curl -Iv https://ABC.XYZ.ts.net/backend/docs/
* Host ABC.XYZ.ts.net:443 was resolved.
* IPv6: (none)
* IPv4: 100.115.6.126
* Trying 100.115.6.126:443...
* Connected to ABC.XYZ.ts.net (100.115.6.126) port 443
* ALPN: curl offers h2,http/1.1
* TLSv1.3 (OUT), TLS handshake, Client hello (1):
* CAfile: /etc/ssl/certs/ca-certificates.crt
* CApath: /etc/ssl/certs
* TLSv1.3 (IN), TLS handshake, Server hello (2):
* TLSv1.3 (IN), TLS handshake, Encrypted Extensions (8):
* TLSv1.3 (IN), TLS handshake, Certificate (11):
* TLSv1.3 (IN), TLS handshake, CERT verify (15):
* TLSv1.3 (IN), TLS handshake, Finished (20):
* TLSv1.3 (OUT), TLS change cipher, Change cipher spec (1):
* TLSv1.3 (OUT), TLS handshake, Finished (20):
* SSL connection using TLSv1.3 / TLS_AES_128_GCM_SHA256 / X25519 / id-ecPublicKey
* ALPN: server accepted h2
* Server certificate:
* subject: CN=ABC.XYZ.ts.net
* start date: May 1 00:31:05 2024 GMT
* expire date: Jul 30 00:31:04 2024 GMT
* subjectAltName: host "ABC.XYZ.ts.net" matched cert's "ABC.XYZ.ts.net"
* issuer: C=US; O=Let's Encrypt; CN=R3
* SSL certificate verify ok.
* 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
* Certificate level 2: Public key type RSA (4096/152 Bits/secBits), signed using sha256WithRSAEncryption
* TLSv1.3 (IN), TLS handshake, Newsession Ticket (4):
* using HTTP/2
* [HTTP/2] [1] OPENED stream for https://ABC.XYZ.ts.net/backend/docs/
* [HTTP/2] [1] [:method: HEAD]
* [HTTP/2] [1] [:scheme: https]
* [HTTP/2] [1] [:authority: ABC.XYZ.ts.net]
* [HTTP/2] [1] [:path: /backend/docs/]
* [HTTP/2] [1] [user-agent: curl/8.5.0]
* [HTTP/2] [1] [accept: */*]
> HEAD /backend/docs/ HTTP/2
> Host: ABC.XYZ.ts.net
> User-Agent: curl/8.5.0
> Accept: */*
>
< HTTP/2 403
HTTP/2 403
< content-length: 9
content-length: 9
< date: Sat, 11 May 2024 02:07:21 GMT
date: Sat, 11 May 2024 02:07:21 GMT
<
* Connection #0 to host ABC.XYZ.ts.net left intact
$