I run into the following issue when I use openssl 1.0.2k (amazon linux2) to check the connection.
[ec2-user@ip-172-31-29-28 ~]$ openssl s_client -connect data.reversinglabs.com:443 -tls1_2 CONNECTED(00000003) 139994515941280:error:1408F10B:SSL routines:SSL3_GET_RECORD:wrong version number:s3_pkt.c:365: --- no peer certificate available --- No client certificate CA names sent --- SSL handshake has read 5 bytes and written 0 bytes --- New, (NONE), Cipher is (NONE) Secure Renegotiation IS NOT supported Compression: NONE Expansion: NONE No ALPN negotiated SSL-Session: Protocol : TLSv1.2 Cipher : 0000 Session-ID: Session-ID-ctx: Master-Key: Key-Arg : None Krb5 Principal: None PSK identity: None PSK identity hint: None Start Time: 1652817101 Timeout : 7200 (sec) Verify return code: 0 (ok) --- [ec2-user@ip-172-31-29-28 ~]$ openssl version OpenSSL 1.0.2k-fips 26 Jan 2017 If I use brew install the latest openssl (3.0.*), then the same command works. As our production is still using openssl 1.0.2k, my question is what causes this error and whether this is really an issue. Thanks.