[lug] New toy: Opteron Scyld GigE Cluster

[gordongoldin at aim.com]

 I'm getting a new toy: Opteron Scyld GigE Cluster 

Running Scyld and Torque.

Anybody ever worked with something like that?

I'm wondering about hardening this machine.

When I read about it, it says that all the messaging between server and compute nodes?is done via demons _server to _mom, so there is no need to worry about things like rsh or scp being needed.

But then I see things like this, in archives:
**************************************************************
.....> It appears to be some kind of permissions error
.............
My guess would have to be that PBS is trying to copy those jobs back via rcp 

or scp and that side of things hasn't been set up correctly..

Certainly with our Torque builds I always use:
    ./configure  --with-scp
to make sure it doesn't try and use rcp (even though rcp is just a symlink to 
scp on our boxes).

As part of hardening, like the folks above, I get rid of things like rcp.  
And I make sure the net parameters disallow redirects or forwards, along with many other things.

But I'm worried I'll break the "communication" between server and compute nodes
*******************************************************************



 Thoughts?



Gordon Golding



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