How to install BFD (Brute Force Detection) Published: Jan 21, 2004

• Rating

  5/5

Comments (36)

• 
  Olly 15:26, January 21, 2004

  What if your IP isnt static, (if you are talking about the ip which you use to connect, not your box ip) how would you get around this problem?
• 
  Mike 02:14, January 23, 2004

  "What if your IP isnt static, (if you are talking about the ip which you use to connect, not your box ip) how would you get around this problem? "
  
  I was wondering the same thing, what if your IP isn't static.
• 
  matlex 04:49, January 27, 2004

  I think its simple then.
  
  Add the whole IP range of your ISP.
  
  for example:
  If you ISP IP range
  12.234.345.0-12.234.345.255
  
  Add just this:
  12.234.345
  
• 
  bman 19:37, February 14, 2004

  any idears how to fix this ?
  tail -f /var/log/bfd_log
  Feb 14 20:35:00 xxxxxx BFD(8570): could not locate $FWFILE, aborting.
• 
  Alex 15:03, March 16, 2004

  could not locate $FWFILE is because you didnt installed APF before
• 
  Ryan 23:48, July 20, 2004

  Q: what if 1, you dont have static ips, and 2, your isp has more then 2 b class ip blocks? as i dont want to add them all and open it upto all 3 1/4 million users they host.
• 
  pierre 19:17, August 19, 2004

  how to install BFD can you write the command pls .<br />
  thank you
• 
  Nonel S. Pagdato 09:12, October 4, 2004

  Hi, is there any BFD application for any flavor of microsoft server, hope to hear from you soon, thanks..
• 
  netcopan 16:58, December 19, 2004

  should we add it into cron? After I restart server it will still be there??
• 
  Steel Rat 22:05, January 12, 2005

  Also a line on how to have BFD startup automatically (unless it's tied to APF in that regard...
• 
  Alan 22:39, January 21, 2005

  >Q: what if 1, you dont have static ips<br />
  <br />
  don't get your password wrong <br />
  <br />
  :)
• 
  Matrafox 09:18, March 23, 2005

  >Q: what if 1, you dont have static ips<br />
  <br />
  Then if u type rong password and u are banned, u just have to reboot your machine to take another Ip, and just try again :)
• 
  xaver 02:38, April 2, 2005

  "There is an included 'install.sh' script that installs all files to<br />
  '/usr/local/bfd/' and places a 8-minute cronjob in '/etc/cron.d/bfd'. The setup<br />
  is really as simple as that."
• 
  Chris 00:03, July 22, 2005

  Thanks works perfect.
• 
  robbert 16:00, August 8, 2005

  many thnx! works perfect!!!!
• 
  Mike 00:37, September 6, 2005

  It would help ppl if you actually gave some good examples of what configurations are preferable on a cPanel or other server, all you are doing here is stating the contents on the RFX site or in a README.
• 
  yenren 13:05, September 11, 2005

  do we have to restart bdf manually everytime we restarted server?
• 
  grabt 10:58, October 22, 2005

  How to stop BFD
• 
  sam 11:44, January 18, 2006

  Its realy good!
• 
  Alexender 08:21, March 5, 2006

  grabt:<br />
  <br />
  to stop BFD , type<br />
  <br />
  /usr/local/sbin/bfd -s <br />
  <br />
  <br />
  
• 
  Luis 02:49, March 15, 2006

  I actully managed to lock myself out of my server the other day after a few typing errors when trying to login... just went and turned my linksys router off, waited a few minutes and then reconnected... I had another IP and was able to enter again.
• 
  James Tervit 19:07, April 17, 2006

  Installed BFD along with a few minor changes to my ports and it stopped failed authentications dead in its tracks..... very cool
• 
  Ramkriz 20:21, July 31, 2006

  BFD is not working with the default rules. Please give me some rules for BFD.<br />
  <br />
  Thanks.
• 
  Alan 10:55, August 17, 2006

  does this bruteforce auto start with system reboot?
• 
  Jose 06:52, September 14, 2006

  Q: Can i type in ignore hosts my dyndns host?<br />
  <br />
  Ex. abcdefg.dyndns.org<br />
  <br />
  Thanks for you teach
• 
  hello123 05:51, October 25, 2006

  how to check whether BFD is started
• 
  Turkulerdiyari 22:08, November 17, 2006

  I get this error :<br />
  could not locate $TLOGP, aborting.<br />
  <br />
  How can i fix this problem.
• 
  sss 11:51, January 16, 2007

  Really gud one
• 
  ePak 22:09, February 1, 2007

  Q: Do I have to restart bfd everytime the server reboots?<br />
  <br />
  A: No. BFD is not a daemon. There is a cron that runs every 10 minutes that sweets the logs for "attacks." So basically, every 10 minutes, it runs on its own. Location of cron: /etc/cron.d/bfd<br />
  <br />
  <br />
  Q: How do I disable BFD?<br />
  <br />
  A: You can remove the cron from /etc/cron.d/bfd or you can use the uninstall script that came in the BFD tar.<br />
  <br />
  I like the script, but my question is, how many lines does it take to cause an IP block?
• 
  Radu 15:55, February 23, 2007

  Has anybody try to install on suse ? Or
• 
  alex 22:39, March 18, 2007

  My bfd can't trace proftpd attack, why?<br />
  Can anyone help me?<br />
  Mar 18 22:23:47 ServerFTP proftpd[8035]: ServerFTP (82.191.154.xxx[82.191.154.xxx]) - USER anonymous: no such user found from 82.191.154.xxx [82.191.154.xxx] to 80.21.159.xxx:21
• 
  Riaan 21:52, September 24, 2007

  Hi there<br />
  <br />
  How can I change the rules so that bfd will block an IP after 2 attempt and what is the default attempts?
• 
  Tim 14:10, October 13, 2007

  RE: Alexander<br />
  <br />
  /usr/local/sbin/bfd -s<br />
  <br />
  That does not STOP bfd, it runs it with standard output. BFD doesn't run as a service, but as cron job. So you'd have to remove the cron job as staed by ePak
• 
  Sabarish...... 21:44, January 20, 2008

  Hi Riaan,<br />
  <br />
  BFD is configured to block after 10 attempts. See the TRIG value inside the files on /usr/local/bfd/rules<br />
  <br />
  Let us know through mail, if u need any further assistance.
• 
  JT 18:29, September 26, 2008

  After restarting BFD, I got the following:<br />
  <br />
  /usr/local/sbin/bfd -s<br />
  BFD version 0.9 <[email protected]><br />
  Copyright (C) 1999-2004, R-fx Networks <[email protected]><br />
  Copyright (C) 2004, Ryan MacDonald <[email protected]><br />
  This program may be freely redistributed under the terms of the GNU GPL<br />
  <br />
  /usr/local/bfd/tlog: line 71: [: : integer expression expected<br />
  /usr/local/bfd/tlog: line 74: [: : integer expression expected<br />
  <br />
  What is the tlog bit mean? Please help...
• 
  dt 06:51, August 6, 2009

  I installed afp. ran it. see it in the log. then install bfd. ran it numerous times. nothing happens other than printing the copyright message, no matter what params I enter. i try failed logins from my other servers over and over and nothing happens. huge messages logfiles, doesn't seem to even try to scan trhem. bfd log file is completely empty. what is wrong? tried this on 2 servers, both didnt work