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15. Advanced Configuration
As detailed in 4. Serial Port, Host, Device and User Configuration, the server console server is set up in Console Server
mode with either RAW or RFC2217 enabled, and the client console server is set up in Serial Bridging mode with the Server
Address and Server TCP Port (4000 + port for RAW or 5000 + port # for RFC2217) specified:
• Select SSH Tunnel when configuring the Serial Bridging Setting.
Next, you will need to set up SSH keys for each end of the tunnel and upload these keys to the server and client console
servers.
Client Keys
The first step in setting up SSH tunnels is to generate keys. Ideally, you will use a separate, secure machine to generate and
store all keys to be used on the console servers. However, if this is not ideal to your situation, keys may be generated on the
console servers themselves.
It is possible to generate only one set of keys and reuse them for every SSH session. While this is not recommended, each
organization will need to balance the security of separate keys against the additional administration they bring.
Generated keys may be one of two types - RSA or DSA (and it is beyond the scope of this document to recommend one over
the other). RSA keys will go into the files id_rsa and id_rsa.pub. DSA keys will be stored in the files id_dsa and id_dsa.pub.
For simplicity, the term private key will be used from this point forward to refer to either id_rsa or id_dsa and public key to
refer to either id_rsa.pub or id_dsa.pub.
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