Passively Cable Tapping Cat5

I always figured it would work to simply push the individual wires into the “pinch” areas of a Cat 5 jack, allowing you to “patch in” to the cable without needing to clip it… and it works! Pics and story at: 7 Habits of Highly Effective Hackers: Passively Cable Tapping Cat5.

Troubleshooting MySQL Replication Error 1045

MySQL Master / Slave replication is amazingly easy to set up. But what if you do everything by the book, log into the slave, and issue the climactic SLAVE START; command, followed by SHOW SLAVE STATUSG, and see this error? Last_IO_Errno: 1045 Last_IO_Error: error connecting to master ‘’ – retry-time: 60 retries: 86400 and your […]

Building httpd-2.2.17 RPM from a tarball

I have a few CentOS 5.4 webservers to upgrade from httpd 2.2.3 to 2.2.17, but 2.2.17 isn’t available as an RPM from in any repository that I can find, so I’m making my own.  Here’s how I did it. First, I built a new CentOS 5.4 x64 virtual machine on a spare 64-bit VMware vCenter server using […]

GNS3 Configuration Guide

Chris Bloomfield has written an excellent, step-by-step guide for installing and configuring GNS3 and using it to build virtual network. GNS3 is actually the graphical front-end of Dynamips/Dynagen and allows you to drag-and-drop routers onto a stage, connect them up, run IOS on them, and save their configs, just as if you had your own […]