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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LEARN ABOUT ULTRIX

sftp-server

sftp-server(1M) 					  System Administration Commands					   sftp-server(1M)

NAME

       sftp-server - SFTP server subsystem

SYNOPSIS

       /usr/lib/ssh/sftp-server

DESCRIPTION

       sftp-server implements the server side of the SSH File Transfer Protocol as defined in the IETF draft-ietf-secsh-filexfer.

       sftp-server is a subsystem for sshd(1M) and must not be run directly. There are no options or config settings.

       To enable the sftp-server subsystem for sshd add the following to /etc/ssh/sshd_config:

       Subsystem   sftp     /usr/lib/ssh/sftp-server

       See sshd_config(4) for a description of the format and contents of that file.

       There is no relationship between the protocol used by sftp-server and the FTP protocol (RFC 959) provided by in.ftpd.

EXIT STATUS

       The following exit values are returned:

       0	Successful completion.

       >0	An error occurred.

FILES

       /usr/lib/sftp-server

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWsshdu 		   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Evolving			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       sftp(1), ssh(1), ssh-add(1), ssh-keygen(1), sshd(1M), sshd_config(4), attributes(5)

       To  view  license  terms,  attribution,	and  copyright	for OpenSSH, the default path is /var/sadm/pkg/SUNWsshdr/install/copyright. If the
       Solaris operating environment has been installed anywhere other than the default, modify the given path to access the file at the installed
       location.

AUTHOR

       Markus Friedl

SunOS 5.10							    30 Jul 2003 						   sftp-server(1M)