Gentoo Archives: gentoo-user

From: Leandro Melo de Sales <leandroal@×××××.com>
To: gentoo-user@l.g.o
Subject: Re: [gentoo-user] SSH authentication attempts - serious issue
Date: Mon, 05 Jun 2006 17:25:35
Message-Id: 5bc4c4570606051011x50bb6437o61fc4f514f057049@mail.gmail.com
In Reply to: Re: [gentoo-user] SSH authentication attempts - serious issue by Joseph
1 Yes, but how can I do it?
2
3 2006/6/5, Joseph <syscon@×××××××××.com>:
4 > Try port knocking. It is very effective.
5 > Your ssh port will be closed until you successfully hit certain number
6 > of ports and even though the ssh port will be open only to the IP
7 > address that successfully opened the port all others will see ssh port
8 > as closed.
9 >
10 > --
11 > #Joseph
12 >
13 > On Mon, 2006-06-05 at 12:06 -0300, Leandro Melo de Sales wrote:
14 > > Hi,
15 > >
16 > > today when I was checking the server log I got many external
17 > > attempts to connect to my sshd service:
18 > >
19 > > ...
20 > > Jun 5 05:09:45 embedded sshd[4740]: Invalid user barbara from x.y.w.z
21 > > Jun 5 05:09:46 embedded sshd[4742]: Invalid user barb from x.y.w.z
22 > > Jun 5 05:09:48 embedded sshd[4744]: Invalid user barbie from x.y.w.z
23 > > Jun 5 05:09:50 embedded sshd[4746]: Invalid user barbra from x.y.w.z
24 > > Jun 5 05:09:51 embedded sshd[4748]: Invalid user barman from x.y.w.z
25 > > Jun 5 05:09:53 embedded sshd[4750]: Invalid user barney from x.y.w.z
26 > > ...
27 >
28 > --
29 > gentoo-user@g.o mailing list
30 >
31 >
32
33
34 --
35 Leandro Melo de Sales.
36 Computer Science Student
37 Laboratório de Sistemas Distribuídos - www.lsd.ufcg.edu.br
38 Laboratório de Sistemas Embarcados e Computação Pervasiva -
39 www.embeddedacademy.org
40 Universidade Federal de Campina Grande - UFCG
41 Campina Grande - PB - Brasil
42
43 "Sometimes people fall in love, but a little bit of them really love
44 or find a truth love. Or sometimes they find it but for some reason
45 they let love pass without live it intensely. This is the free-well."
46
47 --
48 gentoo-user@g.o mailing list

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Re: [gentoo-user] SSH authentication attempts - serious issue Leandro Melo de Sales <leandroal@×××××.com>