![]() Expand Protocols, scroll down, then click SSL. The WCNA Certification program is a top industry certification 1 with over. The Preferences dialog will open, and on the left, you’ll see a list of items. WCNA Certification (formerly referred to as the Wireshark Certified Network Analyst program) proves an individual's in-depth knowledge of TCP/IP and network/protocol analysis for troubleshooting communications, network optimization, network forensics, and security. The end client has not reinstalled the client certificate as yet (3 day lead time). Open Wireshark and click Edit, then Preferences. I have ran openssl s_client -connect x.x.x.x:443 as a test (from the BIG-IP) and I see the server side certs and 'No client certificate CA names sent' which is expected as no client cert sent. ![]() This behaviour occurs regardless of the client authentication/client certificate setting (ignore/request/require). I cannot see anywhere in the capture a certificate provided by the client An expired or unknown certificate is sent by the server or client either at the northbound or at the southbound connection. ![]() The next packet in the flow is an ACK from the source, followed by Alert (Fatal), Description: Certificate Unknown. As part of this exchange, TLS version 1.2 is agreed, along with the agreed cypher. However, if you accept that certificate, even once, the browser will. ![]() From a wireshark capture, the 1st Client Hello is visible, followed by the 'server hello, certificate, server key exchange, certificate request, hello done'. This is nuanced, however, so a novice unfamiliar with Wireshark might be tricked. We are seeing 'Alert 46 Unknown CA' as part of the initial TLS handshake between client & server. ![]()
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