root@aasfproxy1wlg:/etc/haproxy# openssl s_client -connect www.cloudflare.com:443
CONNECTED(00000003)
depth=1 C = US, O = DigiCert Inc, OU = www.digicert.com, CN = DigiCert ECC Extended Validation Server CA
verify error:num=20:unable to get local issuer certificate
verify return:1
depth=0 businessCategory = Private Organization, jurisdictionC = US, jurisdictionST = Delaware, serialNumber = 4710875, C = US, ST = California, L = San Francisco, O = "Cloudflare, Inc.", CN = cloudflare.com
verify return:1
---
Certificate chain
0 s:businessCategory = Private Organization, jurisdictionC = US, jurisdictionST = Delaware, serialNumber = 4710875, C = US, ST = California, L = San Francisco, O = "Cloudflare, Inc.", CN = cloudflare.com
i:C = US, O = DigiCert Inc, OU = www.digicert.com, CN = DigiCert ECC Extended Validation Server CA
1 s:C = US, O = DigiCert Inc, OU = www.digicert.com, CN = DigiCert ECC Extended Validation Server CA
i:C = US, O = DigiCert Inc, OU = www.digicert.com, CN = DigiCert High Assurance EV Root CA
---
Server certificate
-----BEGIN CERTIFICATE-----
-----END CERTIFICATE-----
subject=businessCategory = Private Organization, jurisdictionC = US, jurisdictionST = Delaware, serialNumber = 4710875, C = US, ST = California, L = San Francisco, O = "Cloudflare, Inc.", CN = cloudflare.com
issuer=C = US, O = DigiCert Inc, OU = www.digicert.com, CN = DigiCert ECC Extended Validation Server CA
---
No client certificate CA names sent
Peer signing digest: SHA256
Peer signature type: ECDSA
Server Temp Key: X25519, 253 bits
---
SSL handshake has read 2870 bytes and written 400 bytes
Verification error: unable to get local issuer certificate
---
New, TLSv1.3, Cipher is TLS_AES_256_GCM_SHA384
Server public key is 256 bit
Secure Renegotiation IS NOT supported
Compression: NONE
Expansion: NONE
No ALPN negotiated
Early data was not sent
Verify return code: 20 (unable to get local issuer certificate)