Bruteforce attack on my pc Post: 302140596

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Top Forums UNIX for Dummies Questions & Answers Bruteforce attack on my pc Post 302140596 by rdns on Sunday 14th of October 2007 11:09:25 PM

10-15-2007

Registered User

Bruteforce attack on my pc & IPFW

since putting my pc online, it keeps getting slower and i dig the logfile to have such a surprise:

Quote:

Oct 14 22:13:52 server sshd[68513]: Illegal user video from 200.41.81.228
Oct 14 22:13:52 server sshd[68513]: Failed password for illegal user video from 200.41.81.228 port 54273 ssh2
Oct 14 22:13:53 server sshd[68515]: Failed password for cpanel from 200.41.81.228 port 54337 ssh2
Oct 14 22:13:54 server sshd[68517]: Failed password for cpanel from 200.41.81.228 port 54409 ssh2
Oct 14 22:13:56 server sshd[68519]: Failed password for cpanel from 200.41.81.228 port 54475 ssh2
Oct 14 22:13:57 server sshd[68521]: Illegal user gnax from 200.41.81.228
Oct 14 22:13:57 server sshd[68521]: Failed password for illegal user gnax from 200.41.81.228 port 54545 ssh2
Oct 14 22:13:58 server sshd[68523]: Illegal user gnax from 200.41.81.228
Oct 14 22:13:58 server sshd[68523]: Failed password for illegal user gnax from 200.41.81.228 port 54610 ssh2
Oct 14 22:13:59 server sshd[68525]: Failed password for bind from 200.41.81.228 port 54673 ssh2
Oct 14 22:14:00 server sshd[68527]: Failed password for bind from 200.41.81.228 port 54742 ssh2
Oct 14 22:14:02 server sshd[68529]: Failed password for bind from 200.41.81.228 port 54819 ssh2
Oct 14 22:14:03 server sshd[68531]: Failed password for bind from 200.41.81.228 port 54883 ssh2
Oct 14 22:14:04 server sshd[68533]: Failed password for bind from 200.41.81.228 port 54949 ssh2
Oct 14 22:14:05 server sshd[68535]: Failed password for bind from 200.41.81.228 port 55013 ssh2
Oct 14 22:14:07 server sshd[68537]: Failed password for root from 200.41.81.228 port 55075 ssh2

this is just one of a many and I beleived it's a bruteforce attack
how do i block this IP 200.41.81.228 from trying to knock my online pc?

my system:
FreeBSD testing.net 6.2-STABLE-JE FreeBSD 6.2-STABLE-JE #0: Sat Apr 21 01:07:18 UTC 2007 root@server:/usr/obj/usr/src/sys/GENERIC i386

thank you

Last edited by rdns; 10-15-2007 at 02:39 PM..

rdns

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sss_ssh_authorizedkeys

SSS_SSH_AUTHORIZEDKE(1) 					 SSSD Manual pages					   SSS_SSH_AUTHORIZEDKE(1)

NAME

       sss_ssh_authorizedkeys - get OpenSSH authorized keys

SYNOPSIS

       sss_ssh_authorizedkeys [options] USER

DESCRIPTION

       sss_ssh_authorizedkeys acquires SSH public keys for user USER and outputs them in OpenSSH authorized_keys format (see the "AUTHORIZED_KEYS
       FILE FORMAT" section of sshd(8) for more information).

       sshd(8) can be configured to use sss_ssh_authorizedkeys for public key user authentication if it is compiled with support for either
       "AuthorizedKeysCommand" or "PubkeyAgent" sshd_config(5) options.

       If "AuthorizedKeysCommand" is supported, sshd(8) can be configured to use it by putting the following directive in sshd_config(5):

	   AuthorizedKeysCommand /usr/bin/sss_ssh_authorizedkeys

       If "PubkeyAgent" is supported, sshd(8) can be configured to use it by using the following directive for sshd(8) configuration:

	   PubKeyAgent /usr/bin/sss_ssh_authorizedkeys %u

	This is an experimental feature, please use http://fedorahosted.org/sssd to report any issues.

OPTIONS

       -d,--domain DOMAIN
	   Search for user public keys in SSSD domain DOMAIN.

       -h,--help
	   Display help message and exit.

SEE ALSO

       sshd(8), sshd_config(5), sss_ssh_knownhostsproxy(1).

AUTHORS

       The SSSD upstream - http://fedorahosted.org/sssd

SSSD
								    03/04/2013						   SSS_SSH_AUTHORIZEDKE(1)