Full Disclosure: Re: Distributed SSH username/password brute forceattack

[Anders B Jansson <hdw () kallisti se>]

A.L.M.Buxey () lboro ac uk wrote:
> Hi,
>
> > Oct 22 20:36:13 nms sshd[90657]: Failed password for invalid user gopher 
> > from 77.46.152.2 port 55120 ssh2
> user/password authentication for SSH?  one way of cleaning up your
> logs and killing this type of attack is to reconfigure your OpenSSH
> to only allow key based logins. stopped my 10M+ logfiles straight away
An even better way is to punt the attackers to a 'silent drop' table in your firewall.

Cuts your logs to nothing and keeps the kiddies wasting their time.

The latest attack surge is either directed or a bit more clever, haven't seen anything on my random user DSL traps.
-- 
// hdw

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