How do I prevent unauthorized ssh login attempts?

Peter N. M. Hansteen peter at
Fri Apr 27 07:16:33 UTC 2007

" Andreas Wider?e Andersen " <wodfer at> writes:

> How can I stop these attempts or block them - or even recognize them? I do
> not have IPF installed.

There are several packages which could help, the one I prefer is a
simple pf rule set which tracks the number of connection attempts per
time unit and puts the too-chatty ones in a doghouse list of addresses.

One way to do it is described at

Peter N. M. Hansteen, member of the first RFC 1149 implementation team
"First, we kill all the spammers" The Usenet Bard, "Twice-forwarded tales"
delilah spamd[29949]: disconnected after 42673 seconds.

More information about the freebsd-questions mailing list