How does the NFS client find a users tickets in a filesystem?

Frank Cusack frank at linetwo.net
Sun Sep 14 17:46:07 EDT 2014


There's a so-called 'upcall' mechanism in the filesystem.  rpc.gssd gets
requests from the nfs client through that and sends the answers through the
same mechanism.  It's very patchwork IMHO.

/sbin/mount and mounts_nfs per se have no knowledge of this authentication
backdoor.

On Fri, Sep 12, 2014 at 8:53 AM, Wendy Lin <wendlin1974 at gmail.com> wrote:

> How does the NFS client (say, Linux and AIX) find a users krb5 tickets
> in the filesystem? Does /sbin/mount forward the ticket to rpc.gssd?
>
> Wendy
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