[Beowulf] passwordless "rsh" login
xyzzy at speakeasy.org
Fri Jul 9 14:17:54 PDT 2004
On Fri, 9 Jul 2004, Robert G. Brown wrote:
> this three or four times. Things wrong with rsh:
> a) no security (as in "bleeding wound" in an open network)
> b) no environment passing
> c) no tunnelling/port forwarding
> d) no intrinsic X11 support
> e) archaic and easily spoofed/snooped authentication mechanism (see a))
> f) terrible passwordless login control
> g) more or less frozen, unsupported code
For starting jobs on a cluster with a private network, only b and g really
matter, and then not that much.
> Things good about rsh:
> h) relatively fast
For passing data over gigabit ethernet, rsh/rcp vs ssh/scp is about four times
faster, depending on the CPU.
> Things bad about ssh:
> i) relatively slow
> j) cannot select "no encryption" as option even on secure networks
> k) evil tty disconnect "feature" that requires ~. escapes (nested yet)
> to leave a job backgrounded from an ssh session.
What is so annoying about these things is that they didn't used to be
problems with ssh. They were "features" added intentionally. I cannot
stand the "we know what's best for you" attitude.
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