[Info-vax] SSH on VAX - performance impact of break in attempts

[Ken Robinson]

At 01:53 AM 8/25/2010, urbancamo wrote:
>Good morning,
>
>I have a VAX running Multinet V5.3 under a hobbyist license which has
>an SSH server running to allow access for selected remote users. I've
>been experiencing a number of break in attempts lately, generally
>lasting for several hours each. Each attempt causes the SSH server to
>utilise 100% CPU for about 20 seconds (on a VAXstation 4000/90) - this
>is having a negative impact for users on overall system performance. I
>am using the SSH2 server.
>
>I have attempted a number of strategies to reduce this impact:

Change the port for SSH to something other than the default of 22 
(and tell the real users of the change). This should eliminated 99% 
of the breakin attempts.

Ken