Wireshark Filter for SSL Traffic
Useful Wireshark filter for analysis of SSL Traffic.
Client Hello:
ssl.handshake.type == 1
Server Hello:
ssl.handshake.type == 2
NewSessionTicket:
ssl.handshake.type == 4
Certificate:
ssl.handshake.type == 11
CertificateRequest
ssl.handshake.type == 13
ServerHelloDone:
ssl.handshake.type == 14
Note: “ServerHellpDone” means full-handshake TLS session.
Cipher Suites:
ssl.handshake.ciphersuite
I found the below from Wiki. All these SSL handshake message types ( I had included some of them in the above) can be used as wireshark filter as well.
| Message types | |
|---|---|
| Code | Description |
| 0 | HelloRequest |
| 1 | ClientHello |
| 2 | ServerHello |
| 4 | NewSessionTicket |
| 8 | EncryptedExtensions (TLS 1.3 only) |
| 11 | Certificate |
| 12 | ServerKeyExchange |
| 13 | CertificateRequest |
| 14 | ServerHelloDone |
| 15 | CertificateVerify |
| 16 | ClientKeyExchange |
| 20 | Finished |
Please note:
More and more deployment require more secure mechnism e.g.Perfect Forward Secrecy. To provide PFS, cipher suite need to leverage Elliptic-curve Diffie–Hellman (ECDH) or Ephemeral Diffie-Hellman during the key exchange. In those cases, we can’t use private key to de-encrypt the traffic.
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