I'm a little confused about the question. The clients run as a tftp
client as part of the boot sequence, it's how PXE works... I'm not sure
if tftp is even installed on the linux image on the nodes.
Pretty much any current computer will boot network, and therefore could
be a tftp client. The server runs a tftp server on the cluster side of
the network, and I believe that it is firewalled so the world can't get
to it on the headnode itself. If the firewall is breached, there are
probably easier ways to break into the system then a read-only TFTP server.
Also, it is always a good idea to put a firewall up infront of any
systems that need protection, seperate from the cluster headnode.
stu a wrote:
Dear all,
I am going to move my cluster from behind my university firewall and
into the real world.
However, I am having some concerns about security especially with
regards to tftp.
Does anyone know why tftp is installed on the clients and what stops
it being used for bot-net style etc. activities should the head node's
worldly firewall be breached?
Additionally does anyone know if MPE exists for LAM/MPI, I
particularly want the Fortran bindings. It
appears that MPE comes with MPICH and can be compiled in programs
using LAM/MPI's mpif77, in which case perhaps this could be documented
somewhere because it was a little puzzling?!
Thanks in advance,
Regards,
Stuart Archibald.
MEng 4 Dept. Civil Engineering, Imperial College London, UK.
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