Can't use SSL_get_servername
depth=1 C = PL, ST = Silesia, L = Location, O = Company, OU = SWC, CN = CA Certificate for MQTT (v3)
verify error:num=19:self signed certificate in certificate chain
verify return:1
depth=1 C = PL, ST = Silesia, L = Location, O = Company, OU = SWC, CN = CA Certificate for MQTT (v3)
verify return:1
depth=0 C = PL, ST = Silesia, L = Location, O = Company, OU = SWC, CN = 10.76.75.106
verify return:1
CONNECTED(00000003)
---
Certificate chain
 0 s:C = PL, ST = Silesia, L = Location, O = Company, OU = SWC, CN = 10.76.75.106
   i:C = PL, ST = Silesia, L = Location, O = Company, OU = SWC, CN = CA Certificate for MQTT (v3)
 1 s:C = PL, ST = Silesia, L = Location, O = Company, OU = SWC, CN = CA Certificate for MQTT (v3)
   i:C = PL, ST = Silesia, L = Location, O = Company, OU = SWC, CN = CA Certificate for MQTT (v3)
---
Server certificate
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----
subject=C = PL, ST = Silesia, L = Location, O = Company, OU = SWC, CN = 10.76.75.106

issuer=C = PL, ST = Silesia, L = Location, O = Company, OU = SWC, CN = CA Certificate for MQTT (v3)

---
No client certificate CA names sent
Requested Signature Algorithms: ECDSA+SHA256:ECDSA+SHA384:ECDSA+SHA512:Ed25519:Ed448:RSA-PSS+SHA256:RSA-PSS+SHA384:RSA-PSS+SHA512:RSA-PSS+SHA256:RSA-PSS+SHA384:RSA-PSS+SHA512:RSA+SHA256:RSA+SHA384:RSA+SHA512:ECDSA+SHA224:RSA+SHA224
Shared Requested Signature Algorithms: ECDSA+SHA256:ECDSA+SHA384:ECDSA+SHA512:Ed25519:Ed448:RSA-PSS+SHA256:RSA-PSS+SHA384:RSA-PSS+SHA512:RSA-PSS+SHA256:RSA-PSS+SHA384:RSA-PSS+SHA512:RSA+SHA256:RSA+SHA384:RSA+SHA512
Peer signing digest: SHA256
Peer signature type: RSA-PSS
Server Temp Key: X25519, 253 bits
---
SSL handshake has read 3171 bytes and written 403 bytes
Verification error: self signed certificate in certificate chain
---
New, TLSv1.3, Cipher is TLS_AES_256_GCM_SHA384
Server public key is 2048 bit
Secure Renegotiation IS NOT supported
Compression: NONE
Expansion: NONE
No ALPN negotiated
Early data was not sent
Verify return code: 19 (self signed certificate in certificate chain)
---
281473754120208:error:1409445C:SSL routines:ssl3_read_bytes:tlsv13 alert certificate required:../openssl-1.1.1w/ssl/record/rec_layer_s3.c:1562:SSL alert number 116