Bill Smith wrote:
Hi Guys,
I noticed that someone is trying to hacker into my
machine. Please see below is the content of
/var/log/security.
what I would like some advice of you guys is, what
will I do with these people?
btw, I do have FW
Cheers,
Bill
Aug 24 17:56:28 tiger sshd[8229]: Invalid user golfer
from 80.68.204.50
Aug 24 17:56:28 tiger sshd[8231]: Invalid user golfer
from 80.68.204.50
Aug 24 17:56:29 tiger sshd[8233]: Invalid user golfer
from 80.68.204.50
Aug 24 17:56:30 tiger sshd[8235]: Invalid user golf
from 80.68.204.50
Aug 24 17:56:31 tiger sshd[8237]: Invalid user golf
from 80.68.204.50
Aug 24 17:56:32 tiger sshd[8239]: Invalid user goose
from 80.68.204.50
Aug 24 17:56:32 tiger sshd[8241]: Invalid user goose
from 80.68.204.50
Aug 24 17:56:33 tiger sshd[8243]: Invalid user goose
from 80.68.204.50
Aug 24 17:56:34 tiger sshd[8245]: Invalid user gorges
from 80.68.204.50
Aug 24 17:56:35 tiger sshd[8247]: Invalid user gorges
from 80.68.204.50
Aug 24 17:56:35 tiger sshd[8249]: Invalid user gorges
from 80.68.204.50
Aug 24 17:56:36 tiger sshd[8251]: Invalid user gosling
from 80.68.204.50
Aug 24 17:56:37 tiger sshd[8253]: Invalid user gosling
from 80.68.204.50
Aug 24 17:56:38 tiger sshd[8255]: Invalid user gosling
from 80.68.204.50
Aug 24 17:56:38 tiger sshd[8257]: Invalid user gouge
from 80.68.204.50
Aug 24 17:56:39 tiger sshd[8259]: Invalid user gouge
from 80.68.204.50
Aug 24 17:56:40 tiger sshd[8261]: Invalid user gouge
from 80.68.204.50
Aug 24 17:56:40 tiger sshd[8263]: Invalid user graham
from 80.68.204.50
Aug 24 17:56:41 tiger sshd[8265]: Invalid user graham
from 80.68.204.50
Aug 24 17:56:42 tiger sshd[8267]: Invalid user graham
from 80.68.204.50
Aug 24 17:56:42 tiger sshd[8269]: Invalid user grahm
from 80.68.204.50
Aug 24 17:56:43 tiger sshd[8271]: Invalid user grahm
from 80.68.204.50
Aug 24 17:56:44 tiger sshd[8273]: Invalid user grahm
from 80.68.204.50
Aug 24 17:56:44 tiger sshd[8275]: Invalid user grandpa
from 80.68.204.50
Aug 24 17:56:45 tiger sshd[8277]: Invalid user grandpa
from 80.68.204.50
Aug 24 17:56:46 tiger sshd[8279]: Invalid user grandpa
from 80.68.204.50
Aug 24 17:56:47 tiger sshd[8281]: Invalid user green
from 80.68.204.50
Aug 24 17:56:48 tiger sshd[8283]: Invalid user green
from 80.68.204.50
Aug 24 17:56:48 tiger sshd[8285]: Invalid user green
from 80.68.204.50
Aug 24 17:56:49 tiger sshd[8287]: Invalid user grey
from 80.68.204.50
Aug 24 17:56:50 tiger sshd[8289]: Invalid user grey
from 80.68.204.50
Aug 24 17:56:50 tiger sshd[8291]: Invalid user grey
from 80.68.204.50
Aug 24 17:56:51 tiger sshd[8293]: Invalid user group
from 80.68.204.50
Aug 24 17:56:52 tiger sshd[8295]: Invalid user group
from 80.68.204.50
Aug 24 17:56:52 tiger sshd[8297]: Invalid user group
from 80.68.204.50
Aug 24 17:56:53 tiger sshd[8299]: Invalid user gryphon
from 80.68.204.50
Aug 24 17:56:54 tiger sshd[8301]: Invalid user gryphon
from 80.68.204.50
Aug 24 17:56:54 tiger sshd[8303]: Invalid user gryphon
from 80.68.204.50
Aug 24 17:56:55 tiger sshd[8305]: Invalid user gucci
from 80.68.204.50
Hi Bill,
I haven't much experience and i am not sure, but it looks like a
dictionary attack over your ssh deamon.
First if yuo dont need ssh stop the deamon. :-)
Else one way is to run ssh on a different port or, if possible, restrict
access by source IP address.
If you don't absolutely need a login based on a password, you could also
authenticate via ssh keys (man ssh-keygen). Then you can turn off password
based authentication.
I think that there are many others ways, for more information look at
the archives of securityfocus.
Sorry for my english.
Regards.
--
Morph84
Fedora 3/4 GNU/Linux User
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