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From: "Marek Salwerowicz" <salwerom@iem.pw.edu.pl>
To: "Rick Macklem" <rmacklem@uoguelph.ca>
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Cc: freebsd-current@freebsd.org, Andrzej Tobola <ato@iem.pw.edu.pl>
Subject: Re: NFSv4 and pam_mount - mounting user home directories.
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>> 
>> What I am missing ?
>> 
>> /etc/sysctl.conf is applied before rc.d/nfs* ?
>> 
> That would be my guess. The sysctl's aren't setable until the modules
> are loaded. If you build a kernel with "options NFSD" in its kernel
> config file, then it should be setable as above, I think? (I always
> use sysctl manually after booting, so I don't really know how /etc/sysctl.conf
> works.
> 


After manually setting:

salwerom@freebsd:/etc#sudo sysctl vfs.newnfs.server_max_nfsvers=4
vfs.newnfs.server_max_nfsvers: 4 -> 4
salwerom@freebsd:/etc#sudo sysctl vfs.newnfs.server_min_nfsvers=4
vfs.newnfs.server_min_nfsvers: 4 -> 4
salwerom@freebsd:/etc#

We are still able to mount via NFSv3 (even when those two lines are commented in sysctl.conf).
Any other idea.. ? 

-- 
Marek Salwerowicz