Re: RPC request sent to 127.0.0.1 becomes from other IP on machine

From: Doug Rabson <dfr_at_rabson.org>
Date: Thu, 10 Dec 2015 14:32:39 +0000
I think a local socket is probably the best solution long term. Using a
local socket also allows using filesystem permissions to control access
which is required for gssd but not necessarily for nfsuserd.


On 10 December 2015 at 13:37, Rick Macklem <rmacklem_at_uoguelph.ca> wrote:

> Hi,
>
> Mark has reported a problem via email where the nfsuserd daemon sees
> requests coming from an IP# assigned to the machine instead of 127.0.0.1.
> Here's a snippet from his message:
>   Ok, I have Plex in a jail and when I scan the remote NFS file share the
>   *local* server's nfsuserd spams the logs.
> Spamming the logs refers to the messages nfsuserd generates when it gets
> a request from an address other than 127.0.0.1.
>
> I think the best solution is to switch nfsuserd over to using an AF_LOCAL
> socket like the gssd uses, but that will take a little coding and probably
> won't be MFCable.
>
> I've sent him the attached patch to try as a workaround.
>
> Does anyone happen to know under what circumstances the address 127.0.0.1
> gets replaced?
>
> And do you know if it will always be replaced with the same
> address?
> (I'm basically wondering if the workaround needs to be a list of IP
> addresses
>  instead of a single address?)
>
> Thanks in advance for any help with this, rick
>
>
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Received on Thu Dec 10 2015 - 13:32:41 UTC

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