Linux How To's

Creating a Blackhole DNS with Bind 9

​Malware can be delivered many different ways from either advertisements (remember the NY Times malicous ads?) to hacked websites that contain malicious code.  One technique designed to help curb these infections is through the use of DNS blackhole.  This technique will redirect your internal users to an internal website to block Read more…

Linux How To's

PyMyDB Backup 0.5.1

The first version of PyMyDB Backup has been released and is based on Python 2.4.3. This is a Python script that will back up your MySQL databases, calculate the size of the backed up files, tarball and compress the contents, then email the results. To use:     Download the EPEL Read more…

Linux How To's

Part 2: Adding the firewall rules

In part two of this series we’re going to discuss adding firewall rules to the router.  Everyone knows that adding ingress (or incoming) firewall rules is important to securing your network.  However, the same can be said for adding egress rules for traffic leaving your network.  For instance, aside from Read more…

Linux How To's

GPG Keys

​GnuPG is used to encrypt and sign email messages and files. First you need to create the GPG key: Generating Keys ———————————————————– $ gpg –gen-key ———————————————————– Select option 5 for RSA and then type the encryption level. ———————————————————– Please select what kind of key you want: (1) DSA and Elgamal (default) (2) Read more…