Why not use iptables for that?
You can use it to block brute force attacks, so it should be able to block IP's that connect to your mail server.
will drop IPs with more than 10 connections/minute
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Setting up Secure Ubuntu server on VMware
1. Insert the Ubuntu Server distribution CD or attach the ISO of the CD which is in the “Datastore”. Note that it is important to install the x64 edition on servers, not the X86 editions.
2. Power on th…
It is possible to boost certain documents at query time in Solr. Query time boosting can be a powerful resource for finding the most relevant and "best" content. Of course the more information you index, the more fields you will be able to use for y…
Learn how to navigate the file tree with the shell.
Use pwd to print the current working directory: Use ls to list a directory's contents: Use cd to change to a new directory: Use wildcards instead of typing out long directory names: Use ../ to move…