LinuxQuestions.org - account with uid 77777777 , guest id , how do I block access ?

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account with uid 77777777 , guest id , how do I block access ?

Im trying to send nfs connections with uid 77777777 to a black hole to restrict access. How do I do this ?

I don't think Linux permissions tools really work that way ie actively disallow a specific uid.
It's more a case of only actively allowing everybody else.

You could look at netgroups+NIS http://www.linuxtopia.org/online_boo...g-exports.html
That page also mentions RHEL NFS can use acls; might be worth a try.

Maybe try putting that user in his own primary group eg guest/77777777, don't add any other secondary groups to him and and never allow any group/file to have guest group ownership (apart from his home dirs).

Also, of course set world ('other') perms to '---' everywhere you can.