[rhn-users] Red Hat Enterprise Linux AS release 3 (Taroon Update 2) and tunable NGROUPS_MAX

[Daniel Wittenberg]

Not sure if you found an answer to this, but maybe an option would be to
use a different FTP server?  Maybe one that supports a different
authentication source?  When I worked at U of Iowa we were using proftpd
there and it worked great.  (still using it today too in private
sector).

Dan

On Fri, 2004-12-17 at 14:26 -0600, John C. Koen wrote:
> We are running RH Enterprise AS v3, with kernel: 2.4.21-15.ELsmp.  The problem
> we are encountering is that this kernel has a limit of 16 for NGROUPS_MAX, and 
> we have FTP users who are members of more than 16 groups.
> 
> For these members, the first 16 groups that they are a member of, work fine.  Any
> group after the first 16, will not work unless they use the 'newgrp' command.  I need
> for all 16+ groups to work, all of the time, without the use of 'newgrp'.
> 
> Sometime during the early generations of the 2.6 kernel, /proc/sys/kernel/ngroups_max
> was created and given a value of 65536, tunable with sysctl.  This fixes my issue, however,
> up2date does not show me a path to get from 2.4 to 2.6.
> 
> I have not seen any updates to RHASv3, to include the 2.6 kernel, nor do I know
> of a workaround at this time.
> 
> How can I allow for any of my FTP users to be a working member of more than 16
> groups at a single time?  I either need a patch for 2.4, or a RH Enterprise
> level approval for the 2.6 kernel
> 
> --johnk
> 
> John C. Koen
> Systems & Network Administrator
> Southwestern University, Georgetown, TX
> johnk at southwestern.edu || TEL:512.863.1586 || FAX:512.863.1605
> 
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