![]() Requires immediate termination of the connection.Īlert messages convey the severity of the message (warning or fatal) and a description of the alert. It is a warning, which does not cause a connection termination. In this article, we will focus on the Alert Protocol to troubleshoot TLS issues.ĪLSO READ: OSPF Configuration Explained on Cisco Router Alert Level The Alert Protocol, which sends important messages about the state of the SSL/TLS connection from one side to the other. ![]() The ChangeCipherSpec Protocol, which changes the encryption system currently in use.The Handshake Protocol, which performs the initial key negotiation.TLS handshaking employs three subprotocols that are used to allow peers to agree upon security parameters for the record layer, to authenticate themselves, to instantiate negotiated security parameters, and to report error conditions to each other. In one of the previous articles Analyze TLS and mTLS Authentication with Wireshark, we explored how SSL/TLS handshake works and analyzed SSL/TLS record types in Wireshark.
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