What is client hello in TLS?

How do I filter TLS protocol in Wireshark?

I am using Wireshark and can't figure out how to filter TLS connections in a capture file.

I have looked at the filters and they are not the correct ones for what I want. I am using it to monitor my network connections and my computer is behind a wireless router. I have noticed that in some instances a port of 80 appears. I don't know if that is a port that I have already opened up, or if it is the port the computer is trying to connect to. I am trying to filter all TLS connections and just see the information on the TLS connection.

In TCPView, right click on the column headings to add a new column. Then you can select the columns you want to view in the list on the left. Click "Show All" if you want to see everything.

The option to filter based on protocol is on the right, which selects the protocol in use.

What is client hello in TLS?

If I understood it correctly, client hello is basically a packet that contains the server hello message.

It is a protocol that is needed when using different TLS protocols, because without it we can't know what protocols are available and how to connect. So I would like to know, why this is sent? Is it just a way to tell what protocol is currently in use and what is offered by the server? If so, what protocol could be used instead? Client hello (and in TLS v1.2 the Server hello) are mandatory. It is a way to negotiate the version of the TLS/DTLS protocol, how many bytes to be read and written from the client side, and how many bytes to be sent/received from the server side.

You have to use TLSv1.2 (or later, not sure) because you don't want to be "tricked" into connecting to a malicious server (which could try to send you a fake/malicious server hello).

If you want to know more about protocol negotiations using TLSv1.2 you can check out How to negotiate and use TLS 1.2 protocol.

If you want to know about TLSv1.2 protocol in general you can have a look at Wikipedia's TLS article.

How to check TLS connection in Wireshark?

I have a question, I'm studying a protocol in Wireshark, as well as sniffer capture.

There is a traffic between two computers and I want to check the certificates of both TLS connection.

I know how to check the certificates by using "Analyze->Analyze Encrypted Data" option. However, this option is not working with TLS connection.

How can I check TLS connection by Wireshark? If you're only interested in what's in the headers, then you can configure Wireshark to ignore the cipher/key exchange (it will log them as plaintext) and just show the CertificateRequest or CertificateResponse that was sent or received.