|*** DirectAdmin technical support does not include firewalls, so any use of this guide will be at your own risk, and beyond the reach of our technical support ***|
Read all text included with each step!
1) The first part of thie guide will outline how to setup the actual firewall for the block_ip.sh to use. Note that we're not able to offer any support for this setup, so use it at your own risk. Also, this file is written for a CentOS/Fedora type system and has not been tested on Debian or FreeBSD (it may work on Debian, not sure).
You'll want to test this out to ensure it works for you:
/etc/init.d/iptables restartto make sure you can still connect to everything ok. If not, you may need to head to the datacenter to shut it off (partly why we don't offer support for firewalls)
2) The second step is to install the block_ip.sh so you can create a file that lists the IPs to be blocked. A sample block_ip.sh can be found here.
To install this file, type:
Admin Level -> Brute Force Monitor -> IP Info -> Block IP
This particular block_ip.sh script will check to ensure that the IP you're blocking does not already exist in the list.
It will also generate the output from "iptables -nL" which should show you everything that is current blocked in the list. (iptables -nL is also output in the event the IP is already blocked, so you can see your iptables list without doing anything)
3) Create the empty block list and exempt list files:
4) This last step is optional and should only be used after you've tested the above setup for a while to get comfortable that you're not going to block yourself. The block_ip.sh is only used for an active "click" by the Admin, it does not automate blocking. To automate blocking, install the following script:
If you're running FreeBSD with ipfw, you'd skip steps 1, 2 and 3, and instead, add the following code to the file:
Update: Nov 8, 2012
A guide was written on the forum:
which provides more options.
We've changed our 3 scripts above (step 2) to use the ipfw commands from the mentioned guide (with 'table 10'), but since they use the /root/blocked_ips.txt file, they also support the dateblocked feature, thus can be used for the auto-unblock option.
|Detecting and preventing brute force login attacks|
© 2003 JBMC Software, Suite 173 3-11 Bellerose Drive, St Albert, AB T8N 1P7 Canada. Mon-Fri 9AM-5PM MST