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Writing · Both zones

Everything
in order.

Every post across both doorways, chronological. 139 entries spanning 18 years of fieldwork, engineering, and whatever else found its way into a draft.

2026

10 entries

2025

8 entries

2024

1 entry

2023

3 entries

2022

2 entries

2020

1 entry

2019

4 entries

2018

1 entry

2017

5 entries

2016

8 entries

2015

5 entries

2014

18 entries

Engineering

MPLS Control and Data Plane Cheat Sheet

MPLS · CCNP SP Study Notes · IOS-XE
Engineering

Cisco VIRL - Bare Metal Install Tips and Lessons Learned

Linux · Miscellaneous Hacking · Cisco Virl
Engineering

Cisco VIRL Status? Digital Paper Weight

Miscellaneous Hacking · Cisco Virl · Misc.
Engineering

The Irony of Using SDN and NFV to Study Legacy Network Technologies

Engineering

Mental Note: Tracking L3 Glean Attacks

Network Security · IOS · Routing Protocols
Engineering

pyMultiChange - SSH Script Update

Cisco Administration Python Scripting · Software Defined Networking · Python Tips
Engineering

Updated pyRouterLib and pyMultiChange

Cisco Administration Python Scripting · Software Defined Networking · Python Tips
Engineering

Python with Multiple Threads

Python Tips
Engineering

Connecting Your Virtual IOS-XE and IOX-XR Lab To Your Physical Lab

IOS · Linux · Software Defined Networking
Engineering

Working with Cisco Routers and Switches with Python

Cisco Administration Python Scripting · System Administration · Miscellaneous Hacking
Engineering

Dynamic DNS Updates via the Rackspace Cloud DNS

DNS · Python Tips · Bind
Engineering

Updating my Python Scripts to access Cisco Devices

Cisco Administration Python Scripting · Python Tips
Engineering

Linux Unified Key Setup

Luks · Encryption
Engineering

OSPF Area Types and LSA's

OSPF · CCNP SP Study Notes
Engineering

IOS-XR (XRv) and IOS-XE (CSR1000v) KVM Config Generation

Innovative · Virtualization · Miscellaneous Hacking
Engineering

CCNP - Service Provider - SPROUTE

CCNP SP Study Notes
Engineering

TelnetCisco.py - A Reusable Module for Accessing Cisco Devices with Python

Cisco Administration Python Scripting · Python Tips
Engineering

Quick intro to Puppet

Linux · Puppet

2013

21 entries

Engineering

I'm going to place these here...

Vxlan · Innovative · SDN
Engineering

DMVPN with VRF's for the Internet interfaces and BGP

Dmvpn · Vrf · BGP
Engineering

Rackspace Performance vs Standard Cloud Server Disk I/O

Filesystems · Rackspace
Engineering

Managing Cisco Routers / Switches with Python, Take 2

Cisco Administration Python Scripting · IOS · System Administration
Engineering

Configuring Cisco routers and switches with Python

Cisco Administration Python Scripting · IOS · Python Tips
Engineering

BGP Goodness and Links

BGP
Engineering

Google Chromecast and scanning for WiFi Networks

Miscellaneous Hacking · Google · Wireshark
Engineering

Performing a full system restore after a Linux server re-kick

Bash Tips · Linux · Backup And Recovery
Engineering

Introduction to MPLS

MPLS
Engineering

SDN Goodness

Nicira · SDN · Openstack
Engineering

SELinux For Mere Mortals

SELinux · Linux
Engineering

Cisco Zone Based Firewall and UDP based Traceroute

IOS · Ios Security · Cisco Firewalls
Engineering

Filesystem I/O Speeds Benchmarking Perl Script

Linux · Filesystems · Perl Tips
Engineering

Learning Python

Python Tips
Engineering

Bash - Random Password Changer

Bash Tips · Pranks
Engineering

Bash Shell Enumerator - Command Not Found

Bash Tips · Pranks
Engineering

Quick one-liner to change all databases tables to InnoDB in MySQL.

Bash Tips · System Administration · Mysql
Engineering

OpenNHRP RPM Updated

Opennhrp · Open Source Alternatives
Engineering

Linux File Server for Apple Time Machine Backups

Linux · Netatalk · Afp
Engineering

Rackspace Private Cloud Edition - Compute Setup

Openstack · Private Cloud Edition · Rackspace
Engineering

Rackspace Cloud Servers and Networks with Open vSwitch and VXLAN between Data Centers

Linux · Software Defined Networking · Vxlan

2012

32 entries

Engineering

Playing with Openvswitch.

Linux · Software Defined Networking · SDN
Engineering

The Nerdiest IPv6 related domain name on the Internet

IPv6
Engineering

IPv6 Subnetting

Subnetting · IPv6
Engineering

IPv4 Subnetting Made Easy

Subnetting · IPv4 · CCNA Study Notes
Engineering

SELinux - Listing Available Contexts

SELinux · Linux · RHCE Study Notes
Engineering

RHCE Series: HTTP

Linux · RHCE Study Notes · Apache
Engineering

RHCE Series: SMTP

Linux · RHCE Study Notes · Sendmail
Engineering

RHCE Series: SSH and NTP

Linux · Ntp · RHCE Study Notes
Engineering

Making NAT work with the default Red Hat iptables ruleset

iptables · Linux · Firewall
Engineering

RHCE Series: DNS

Linux · RHCE Study Notes · DNS
Engineering

RHCE Series: FTP

Vsftpd · Linux · RHCE Study Notes
Engineering

Free Web-Based F5 Training

F5 · Training
Engineering

RHCE Series: Configure SELinux to support the service.

SELinux · Linux · RHCE Study Notes
Engineering

RHCE Series: Configure the service to start when the system is booted.

Linux · RHCE Study Notes
Engineering

RHCE Series: Build a simple RPM that packages a single file.

Linux · RHCE Study Notes · Opennhrp
Engineering

RHCE Series: Produce and deliver reports on system utilization

Linux · RHCE Study Notes · System Administration
Engineering

RHCE Series: Remote Logging

Linux · RHCE Study Notes · Logging
Engineering

RHCE Series: Configure a system as an iSCSI initiator that persistently mounts an iSCSI target.

Linux · RHCE Study Notes · Iscsi
Engineering

RHCE Series: Use /proc/sys and sysctl to modify and set kernel runtime parameters.

Kernel Tuning · Linux · RHCE Study Notes
Engineering

RHCSA Class Notes

Luks · Rhcsa Study Notes · SELinux
Engineering

RHCE Series: Use iptables to implement packet filtering and configure network address translation (NAT): Part 2

iptables · Linux · RHCE Study Notes
Engineering

Making a VM boot at VM host boot in KVM

Linux · Virtualization · Kvm
Engineering

RHCE Series: Use iptables to implement packet filtering and configure network address translation (NAT): Part 1

iptables · Linux · RHCE Study Notes
Engineering

Think that you have a compromised Red Hat based system?

Linux · Security · Rpm
Engineering

PPTP to HE IPv6 Network Perl Script

Linux · IPv6 · Perl Tips
Engineering

RHCE Series: Route IP traffic and create static routes

Linux · RHCE Study Notes · Routing Protocols
Engineering

IPv6 Subnetting

Subnetting · IPv6
Engineering

RHCE Exam Objectives

RHCE Study Notes
Engineering

OpenNHRP is now available via RPM

Linux · Dmvpn · System Administration
Engineering

Logical Volume Management in Linux

Linux · Filesystems · System Administration
Engineering

Using a Proxy Server to access the IPv6 Internet?

Linux · System Administration · Proxy
Engineering

Linux Encrypted Filesystems

Linux · Filesystems · Security

2011

3 entries

2010

11 entries

2009

6 entries