[CentOS] Paranoid Firewalling
hyclak at math.ohiou.edu
Sat Oct 8 19:41:03 UTC 2005
On Sat, Oct 08, 2005 at 01:50:59PM -0400, Sam Drinkard enlightened us:
> Looking at that perl script gave me an idea, but yet a question. I
> notice there is a line that says something about "Max Retries". Is that
> something that is configurable somewhere, or can be turned on?
> I know there have been long discussions about blocking the brute force
> attempts at breakins, but at the time I did not see much need for it.
> Not long after that, I started seeing somewhere between 100 and as high
> as 800 attempts to break in via the sshd. Not that I'm too worried
> about someone guessing a password, but in those numbers, it does take
> some bandwidth. I'd like to see something like Max Retries of 3, so if
> someone tries 3 times to guess the password, or different usernames, it
> would throw their IP/hostname into the /etc/hosts.deny file,
> permanently. BSD does things a bit different, in that the hosts.allow
> does both the allows and the denies, making hosts.deny pretty much
> moot. Given those thoughts, what kind of something is available to do
> just that -- the max retries thingy?
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