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Status Functionality already exists
Workspace AIX
Created by Guest
Created on Aug 25, 2020

Allow to disable NFS client delegation on NFS server

When an NFSv4 client mounts a share from an NFS server and has nfso client_delegation set to 1, it causes the rtcmd daemon on NFS server to establish a callback connection to the n4bg daemon on the NFS client on a random high port.

These connections are not necessary for NFS functionality, and in the environments where not specifically allowed they cause numerous drops on the firewalls. This becomes a source of complaints coming from the network team.

As seen in the support case TS003909582, it does not seem to be possible to disable this callback on the NFS server. The only way to do so today is to disable it on the clients. This is cumbersome in certain environments where NFS clients and server are managed by different entities, and e.g. a "misconfigured" client can cause problem for NFS server administrator since it's the NFS server that is establishing the connection. It's much more efficient to just disable this type of connection on the server side.

Idea priority High
  • Guest
    Jan 17, 2024

    Server_delegation=0 or export using option deleg=no doesn't work. When combining AIX NFS server and Linux client using 4.1 or 4.2 you have no way how to get rid of deleg and that's shame for AIX admin.

  • Guest
    Jan 3, 2023

    Client delegation is available, but doesn't solve the problem "Option to disable client delegation on the SERVER SIDE". Server_delegation=0 or export option deleg=no doesn't work and NFS client using default client_delegation=1 nfs option overrides this!

  • Guest
    Nov 7, 2022
    Client delegation is already available.