On 2 October 2014 13:05, Jason L Tibbitts III <tibbs(a)math.uh.edu> wrote:
>>>>> "KF" == Kevin Fenzi
KF> Sadly that won't work. The only people who have accounts are those
KF> in cla_done + 1 group. So, the people without that don't even have
KF> an account, so they can't authenticate. ;(
Is it possible to give them accounts that have no permission to do
anything? I used to change the shell to /usr/local/bin/terminated,
which printed a message about the account being closed.
In this case that would be close to a hundred thousand accounts linked to
/bin/noshellforyou for the 3200 that are cla+1. In the past that was a
great way to DOS a machine.. just have a sshbot go by and get a bunch of
nologins and the amount of cpu for login search/setup/deny was enough to
DOS a box
The only solution I have seen in practice is having the ssh banner set, but
everywhere I worked at previously was legally required to have messages in
banners so my world view is biased.
infrastructure mailing list
Stephen J Smoogen.