RE: [gentoo-user] SSH authentication attempts - serious issue

[CR Little]

Do Programs like denyhosts work with other protocols? Such as POP or
FTP?

-----Original Message-----
From: Joseph [mailto:syscon@×××××××××.com] 
Sent: Monday, June 05, 2006 11:32 AM
To: gentoo-user@l.g.o
Subject: Re: [gentoo-user] SSH authentication attempts - serious issue

Try port knocking.  It is very effective.
Your ssh port will be closed until you successfully hit certain number
of ports and even though the ssh port will be open only to the IP
address that successfully opened the port all others will see ssh port
as closed.

-- 
#Joseph

On Mon, 2006-06-05 at 12:06 -0300, Leandro Melo de Sales wrote:
> Hi,
>
>    today when I was checking the server log I got many external
> attempts to connect to my sshd service:
>
> ...
> Jun  5 05:09:45 embedded sshd[4740]: Invalid user barbara from x.y.w.z
> Jun  5 05:09:46 embedded sshd[4742]: Invalid user barb from x.y.w.z
> Jun  5 05:09:48 embedded sshd[4744]: Invalid user barbie from x.y.w.z
> Jun  5 05:09:50 embedded sshd[4746]: Invalid user barbra from x.y.w.z
> Jun  5 05:09:51 embedded sshd[4748]: Invalid user barman from x.y.w.z
> Jun  5 05:09:53 embedded sshd[4750]: Invalid user barney from x.y.w.z
> ...

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