It has been embraced by network admins worldwide and has become one of the essential network troubleshooting tools for IT teams.

However, if you know the TCP port used (see above), you can filter on that one.Wireshark is one of the most popular network packet analyzers available. You cannot directly filter SSH protocols while capturing. Show only the SSH based traffic: ssh Capture Filter

Display FilterĪ complete list of SSH display filter fields can be found in the display filter reference Keep it short, it's also a good idea to gzip it to make it even smaller, as Wireshark can open gzipped files automatically. XXX - Add a simple example capture file to the SampleCaptures page and link from here. For this to work the TCP option 'Allow subdissectors to reassemble TCP streams' must be enabled. The SSH dissector has a preference to determine whether it should reassemble PDUs spread across multiple TCP segments. Work on SSH2 decryption is tracked at Preference Settings This is also not possible unless the shared secret (from the Diffie-Hellman key exchange) is extracted from the SSH server or client (see, as an example of a mechanism to extract internal information of that sort, the 'SSLKEYLOGFILE' method in TLS). Unlike the TLS dissector, no code has been written to decrypt encrypted SSH packets/payload (yet). The SSH dissector in Wireshark is functional, dissecting most of the connection setup packets which are not encrypted. XXX - Add example traffic here (as plain text or Wireshark screenshot). The well known TCP port for SSH traffic is 22. TCP: Typically, SSH uses TCP as its transport protocol.

XXX - add a brief description of SSH history Protocol dependencies SSH uses encryption to protect the contents (most notably passwords) being sent over its connection. Secure Shell (SSH) is a replacement for older remote shell programs such as telnet.

Wireshark capture filter for ssh