Steffen Weiberle wrote:

Is it safe to generalize that non-LOFS file systems in Solaris 10 do not allow cross-zone interaction? procfs does not. namefs does not. tmpfs does not. sockfs does not. doors does not. What about all the others (I can't even name them all)?
Doors can be used in Solaris for cross-zone communication if the rendezvous file is visible in each zone. TX has conditional code to disallow cross-zone doors unless one end is running in the global zone.

TX has a pretty simple rule that no data can be written to by more than one zone because each zone has a unique sensitivity label. This applies to all file system mounts including NFS mounts. There is no equivalent rule for standard Solaris. So if you need to enforce mandatory data flow policies, you probably need TX.

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