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ASA Double Nat in 8.4+
Recently I was faced with an issue outside my normal expertise… those of you that know me realize I am anything but a security engineer. But in reality, you must always expand your horizons. One of the...
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Fixing iMessage on Hackintosh
Mid December 2012 Apple shut down the Messages Beta for Lion, soon after many hackintosh users started noticing issues with signing into iMessage. At some point in time, people far smarter than me...
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Cisco ASA Packet Captures for Fun and Profit
As many of you know my background isn’t in enterprise, but I currently fill that role in my $job. In order to succeed I’ve had to develop many new skills including learning Cisco Wireless, UCS, a...
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Vendor PSA: Words and Phrases to Avoid in Presentations
Over the years IT professionals have sat through countless presentations, conference calls, and keynotes. We’ve been preached too, explained “the problem”, and forced to bear witness to the the future....
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Using Deny ACEs in your PBR ACL on your Nexus 7k
Quite a while ago I had a need for some network duct tape… Policy Based Routing while useful should only IMHO be used as a temporary fix. But as you know, temporary things soon become part of...
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Installing VMware tools on Cisco ACS
As of ACS v5.4 Cisco has finally included VMware tools for their ADE OS. Unfortunately, when you upgrade, they do not get installed automatically as the installation is triggered during the initial...
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HP talks SDN at Interop NYC 2014
I generally try to avoid combing my thoughts about presentations, but I have to mention that after sitting down with Glue Networks and their “SDN” presentation, it was truly a breath of fresh air to...
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Cisco ISR 4000 – Now with more licensing!
This week an Interop NYC, Cisco launched it’s ISR 4000 Series. This is a new approach for them focused on delivering services to your branch offices. Cisco has dubbed this new approach the Intelligent...
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Network Design — Keeping it simple
Since the dawn of time people have skirted best practice and banged together networks, putting the proverbial square peg in the esoteric round hole. For example, new vendor XYZ’s solution has brought...
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AS-Path Filtering
Before we get into the how, let’s talk about the why. According to the CIDR Report, the global IPv4 routing table sits at about 525,000 routes, it has doubled in size since mid 2008 and continues to...
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The Unofficial JNCIE-ENT Prep Guide
Some of you may have heard that Jeff Fry has published his Unofficial JNCIE-ENT Prep Guide, but how many of you have purchased it yet? I’ve had the opportunity to look it over as he was completing it,...
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Cisco VIRL released into the wild
After much waiting from all of us, Cisco has released, on “cyber Monday” no less, VIRL. As you may remember, VIRL was the talk of CLUS 2013, and many of us have been eagerly waiting for this tool ever...
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Binary Metal Guitar
Thank you Ed for sharing the video the led me to find this… Tony Mattke Network engineer currently servicing the enterprise data center market. I started working on networks in the ’90s and still feel...
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Cisco Live 2015 – Customer Appreciation Event Featuring Aerosmith!!
Yes, you heard me right. Aerosmith! One of the most looked forward to social events for Cisco Live has always been the Customer Appreciation Events (CAE). Cisco rarely let’s us down when throwing this...
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BGP Communities
BGP Communities has to be one of my favorite features added to the BGP protocol. As you should know by now, BGP passes several attributes between peers that help influence the BGP best path selection...
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Cisco Live 2015 – Mike Rowe Announced as Keynote Speaker
Cisco just announced to the Cisco Champion community that the guest speaker for the keynote is going to be none other than …… Mike Rowe!! In case you don’t know, Mike Rowe is an American TV host,...
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FCC approves net neutrality rules, reclassifies broadband as a utility
Today is a good day. By a 3-2 vote, the FCC has voted to adopt net neutrality rules to protect the open Internet. This plan will reclassify internet access as a Title II public utility, which in turn...
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Well-Known Intervals
Listed below are many events which occur on network devices at well-known intervals. The list is provided to serve as an aid while troubleshooting recurring network disruptions. Please consider helping...
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ASA v9.4 Elliptic Curve Cryptography with TLS1.2
With ASA version 9.4 Cisco has added support for Elliptic curve cryptography (ECC), which is one of the most powerful types of encryption in use today. While ECC has been in use since 2004, only it’s...
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PCAP or it didn’t happen…. The t-shirt!
Some days I don’t know why I do things… But last night I was playing around with creating a PCAP meme when my friend Josh Kittle said he’d be interested in a t-shirt like that. I got to thinking about...
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