RADIUS is re-using an existing session: 12502: Extracted EAP-Response containing EAP-TLS challenge-response and accepting EAP-TLS as negotiated: 12800: Extracted first TLS record; TLS handshake started: 12805: Extracted TLS ClientHello message: 12806: Prepared TLS ServerHello message: 12807: Prepared TLS Certificate message: 12808: Prepared TLS

Postfix TLS Support When the TLS handshake fails for an opportunistic TLS session, rather than give up on mail delivery, the Postfix SMTP client retries the transaction with TLS disabled. Trying an unencrypted connection makes it possible to deliver mail to sites with non-interoperable server TLS implementations. Enable Transport Layer Security (TLS) 1.2 overview This negotiated version is the one that is used for the connection. If the server doesn't support the version presented by the client, the server message will specify the highest version it can use. For more information about the TLS Handshake protocol, see Establishing a Secure Session by using TLS. What is TLS encryption and how does it work? | Comparitech Feb 25, 2019

TLS Caching Explained on BIG-IP DevCentral

What is TLS encryption and how does it work? | Comparitech

What is a TLS/SSL certificate, and how does it work?

Postfix TLS Support When the TLS handshake fails for an opportunistic TLS session, rather than give up on mail delivery, the Postfix SMTP client retries the transaction with TLS disabled. Trying an unencrypted connection makes it possible to deliver mail to sites with non-interoperable server TLS implementations. Enable Transport Layer Security (TLS) 1.2 overview This negotiated version is the one that is used for the connection. If the server doesn't support the version presented by the client, the server message will specify the highest version it can use. For more information about the TLS Handshake protocol, see Establishing a Secure Session by using TLS. What is TLS encryption and how does it work? | Comparitech Feb 25, 2019 TLS v1: How does the SSL Session ID mechanism work