[K12OSN] LTSP server with 3 NICs?

Rob Owens rob.owens at biochemfluidics.com
Mon Dec 29 13:01:54 UTC 2008

I'd just like to point out that if /etc/hosts.deny is empty, it doesn't
matter what you have in /etc/hosts.allow.  Everything will be allowed by
default if nothing is denied.


Terrell Prudé Jr. wrote:
> I actually didn't have to touch /etc/hosts.allow, just /etc/hosts. 
> Reason is that there aren't any network services (e. g. SSH, httpd) to
> which the clients connect.  They're thin clients.
> That might be different with LTSP 5, though, since it encrypts
> everything in SSH tunnels.  I just haven't tried it yet (no time).
> --TP
> _______________________________
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> R. Scott Belford wrote:
>> 2008/12/19 "Terrell Prudé Jr." <microman at cmosnetworks.com>:
>>> This is exactly how I did the PPC/x86/SPARC K12LTSP server a while back, and
>>> yes, it would work wonderfully for your situation.
>>> Basically, you'd need to do this:
>>> 1.)  Set up your third NIC for another client subnet (e. g.,
>>> and hook 'er up to that switch.
>>> 2.)  Modify /etc/hosts to include host entries for the range,
>>> just like the ones for are today.
>> Right on, Terrell.  This is how I have done it for labs and for the
>> PTC email garden.  I am thinking that /etc/hosts.allow needs to be
>> modified, and I think I had to assign somewhat different hostnames for
>> the range in /etc/hosts.
>>> Note that this is not channel-bonding.  This is just good ol' fashioned
>>> separate interfaces on separate broadcast domains.  There doesn't seem to be
>>> any need to channel-bond here.
>> This is a key point for many.  Often times the congestion on your
>> server is not at your dual or core or octa CPU or in your RAM or in
>> your disk I/O.  It is at your single NIC, even if it's a giganic,
>> trying to serve all that data.  I rarely do an install with only one
>> NIC for the LAN.
>>> --TP
>> --scott
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