s_server -accept 8443 -cert /certs/tls.crt -cert_chain /certs/tls.crt -key /certs/tls.key -verify 1 -CAfile /certs/tls.crt -www 
This TLS version forbids renegotiation.
Ciphers supported in s_server binary
TLSv1.3    :TLS_AES_256_GCM_SHA384    TLSv1.3    :TLS_CHACHA20_POLY1305_SHA256 
TLSv1.3    :TLS_AES_128_GCM_SHA256    TLSv1.2    :ECDHE-ECDSA-AES256-GCM-SHA384 
TLSv1.2    :ECDHE-RSA-AES256-GCM-SHA384 TLSv1.2    :DHE-RSA-AES256-GCM-SHA384 
TLSv1.2    :ECDHE-ECDSA-CHACHA20-POLY1305 TLSv1.2    :ECDHE-RSA-CHACHA20-POLY1305 
TLSv1.2    :DHE-RSA-CHACHA20-POLY1305 TLSv1.2    :ECDHE-ECDSA-AES128-GCM-SHA256 
TLSv1.2    :ECDHE-RSA-AES128-GCM-SHA256 TLSv1.2    :DHE-RSA-AES128-GCM-SHA256 
TLSv1.2    :ECDHE-ECDSA-AES256-SHA384 TLSv1.2    :ECDHE-RSA-AES256-SHA384   
TLSv1.2    :DHE-RSA-AES256-SHA256     TLSv1.2    :ECDHE-ECDSA-AES128-SHA256 
TLSv1.2    :ECDHE-RSA-AES128-SHA256   TLSv1.2    :DHE-RSA-AES128-SHA256     
TLSv1.0    :ECDHE-ECDSA-AES256-SHA    TLSv1.0    :ECDHE-RSA-AES256-SHA      
SSLv3      :DHE-RSA-AES256-SHA        TLSv1.0    :ECDHE-ECDSA-AES128-SHA    
TLSv1.0    :ECDHE-RSA-AES128-SHA      SSLv3      :DHE-RSA-AES128-SHA        
TLSv1.2    :RSA-PSK-AES256-GCM-SHA384 TLSv1.2    :DHE-PSK-AES256-GCM-SHA384 
TLSv1.2    :RSA-PSK-CHACHA20-POLY1305 TLSv1.2    :DHE-PSK-CHACHA20-POLY1305 
TLSv1.2    :ECDHE-PSK-CHACHA20-POLY1305 TLSv1.2    :AES256-GCM-SHA384         
TLSv1.2    :PSK-AES256-GCM-SHA384     TLSv1.2    :PSK-CHACHA20-POLY1305     
TLSv1.2    :RSA-PSK-AES128-GCM-SHA256 TLSv1.2    :DHE-PSK-AES128-GCM-SHA256 
TLSv1.2    :AES128-GCM-SHA256         TLSv1.2    :PSK-AES128-GCM-SHA256     
TLSv1.2    :AES256-SHA256             TLSv1.2    :AES128-SHA256             
TLSv1.0    :ECDHE-PSK-AES256-CBC-SHA384 TLSv1.0    :ECDHE-PSK-AES256-CBC-SHA  
SSLv3      :SRP-RSA-AES-256-CBC-SHA   SSLv3      :SRP-AES-256-CBC-SHA       
TLSv1.0    :RSA-PSK-AES256-CBC-SHA384 TLSv1.0    :DHE-PSK-AES256-CBC-SHA384 
SSLv3      :RSA-PSK-AES256-CBC-SHA    SSLv3      :DHE-PSK-AES256-CBC-SHA    
SSLv3      :AES256-SHA                TLSv1.0    :PSK-AES256-CBC-SHA384     
SSLv3      :PSK-AES256-CBC-SHA        TLSv1.0    :ECDHE-PSK-AES128-CBC-SHA256 
TLSv1.0    :ECDHE-PSK-AES128-CBC-SHA  SSLv3      :SRP-RSA-AES-128-CBC-SHA   
SSLv3      :SRP-AES-128-CBC-SHA       TLSv1.0    :RSA-PSK-AES128-CBC-SHA256 
TLSv1.0    :DHE-PSK-AES128-CBC-SHA256 SSLv3      :RSA-PSK-AES128-CBC-SHA    
SSLv3      :DHE-PSK-AES128-CBC-SHA    SSLv3      :AES128-SHA                
TLSv1.0    :PSK-AES128-CBC-SHA256     SSLv3      :PSK-AES128-CBC-SHA        
---
Ciphers common between both SSL end points:
TLS_AES_256_GCM_SHA384     TLS_AES_128_GCM_SHA256     TLS_CHACHA20_POLY1305_SHA256
ECDHE-ECDSA-AES256-GCM-SHA384 ECDHE-ECDSA-AES128-GCM-SHA256 ECDHE-ECDSA-CHACHA20-POLY1305
ECDHE-RSA-AES256-GCM-SHA384 ECDHE-RSA-AES128-GCM-SHA256 ECDHE-RSA-CHACHA20-POLY1305
Signature Algorithms: ECDSA+SHA384:ECDSA+SHA256:Ed25519:RSA-PSS+SHA512:RSA-PSS+SHA384:RSA-PSS+SHA256:RSA+SHA512:RSA+SHA384:RSA+SHA256
Shared Signature Algorithms: ECDSA+SHA384:ECDSA+SHA256:Ed25519:RSA-PSS+SHA512:RSA-PSS+SHA384:RSA-PSS+SHA256:RSA+SHA512:RSA+SHA384:RSA+SHA256
Supported groups: x25519:secp256r1:secp384r1
Shared groups: x25519:secp256r1:secp384r1
---
New, TLSv1.3, Cipher is TLS_AES_256_GCM_SHA384
SSL-Session:
    Protocol  : TLSv1.3
    Cipher    : TLS_AES_256_GCM_SHA384
    Session-ID: D49C60F738B4F4FC92929C0D5CF227C25ED823B5BF769FC6879FE1C6DCE6BC53
    Session-ID-ctx: 01000000
    Resumption PSK: 3069A6ADBBDD712E1A889086E75195C010B01335863B1050F7521A2E39CAC8BDA159DE1AFF350AEF9CAB8C9B9FC2F4DF
    PSK identity: None
    PSK identity hint: None
    SRP username: None
    Start Time: 1789749157
    Timeout   : 7200 (sec)
    Verify return code: 0 (ok)
    Extended master secret: no
    Max Early Data: 0
---
   0 items in the session cache
   0 client connects (SSL_connect())
   0 client renegotiates (SSL_connect())
   0 client connects that finished
 249 server accepts (SSL_accept())
   0 server renegotiates (SSL_accept())
 168 server accepts that finished
   7 session cache hits
  20 session cache misses
   0 session cache timeouts
   0 callback cache hits
   0 cache full overflows (128 allowed)
---
no client certificate available