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| 2023-02-13 | 2023-05-24 | ||
| beta (martin) | ui_login_authentication (martin) | ||
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| The advantage of doing GSSAPI authentication as part of the SSH key exchange is apparent when you are using [[ui_login_authentication#gssapi_delegation|credential delegation]]. The SSH key exchange can be repeated later in the session, and this allows your Kerberos V5 credentials (which are typically short-lived) to be automatically re-delegated to the server when they are refreshed on the client. (This feature is commonly referred to as "cascading credentials".) | The advantage of doing GSSAPI authentication as part of the SSH key exchange is apparent when you are using [[ui_login_authentication#gssapi_delegation|credential delegation]]. The SSH key exchange can be repeated later in the session, and this allows your Kerberos V5 credentials (which are typically short-lived) to be automatically re-delegated to the server when they are refreshed on the client. (This feature is commonly referred to as "cascading credentials".) | ||
| - | If your server doesn't support GSSAPI key exchange, it may still support GSSAPI in the SSH user authentication phase. This will still let you log in using your Kerberos credentials, but will only allow you to delegate the credentials that are active at the beginning of the session; they can't be refreshed automatically later, in a long-running session. | + | If your server doesn't support GSSAPI key exchange, it may still support GSSAPI in the SSH user authentication phase. This will still let you log in using your Kerberos credentials, but will only allow you to delegate the credentials that are active at the beginning of the session; they can't be refreshed automatically later, in a long-running session. The GSSAPI authentication can be configured on the [[ui_login_authentication#gssapi|//SSH > Authentication// page]]. |
| Another effect of GSSAPI key exchange is that it replaces the usual [[ssh_verifying_the_host_key|SSH mechanism of permanent host keys]]. So if you use this method, then you won't be asked any interactive questions about whether to accept the server's host key. Instead, the Kerberos exchange will verify the identity of the host you connect to, at the same time as verifying your identity to it. | Another effect of GSSAPI key exchange is that it replaces the usual [[ssh_verifying_the_host_key|SSH mechanism of permanent host keys]]. So if you use this method, then you won't be asked any interactive questions about whether to accept the server's host key. Instead, the Kerberos exchange will verify the identity of the host you connect to, at the same time as verifying your identity to it. | ||