Network Break 52 offers a reality check on VMware's prediction of AI for IT, covers VMworld news, speculates on the Cisco/Apple partnership, and delves into Ashley Madison bots.
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This is a bit of a slow week in the US, and I’ve been deeply imbibing philosophy and theology this weekend (getting ready for the first two PhD classes), so I’m going to do something a little different this week. A lot of folks email me asking about which of my books are worth buying, or asking me if they should buy this or that specific book I’ve written across the years. So, herewith, an honest appraisal of my own books.
This book is based on single question—what have we learned from working on failed networks from the perspective of TAC and Escalation in terms of good network design? It’s hard to believe, but this was (AFAIK) the second book published by Cisco Press, in 1999 (that’s 16 years, 10 books, and two degrees ago!). While I have a fond place in my heart for this book, all the material here is generally updated and improved in Optimal Routing Design, below.
This started life as the EIGRP white paper, written based on a thorough reading of the EIGRP code base as it existing in 2000, along with many hours spent with GDB, Continue reading
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It's the orchestration that makes software-defined security possible, Fortinet says.
ZeusVM is a relatively new addition to the Zeus family of malware. Like the other Zeus variants, it is a banking trojan (“banker”) that focuses on stealing user credentials from financial institutions. Although recent attention has been on non-Zeus based bankers such as Neverquest and Dyreza, ZeusVM is still a formidable threat. At the time of this writing, it is actively being developed and has implemented some interesting features such as a custom virtual machine and basic steganography. In addition, due to a recent leak of a builder program, the ability to create new ZeusVM campaigns is now in the hands of many more miscreants.
To foster a better understanding of ZeusVM, the attached paper examines some of the internals of the malware from a reverse engineer’s perspective. While it doesn’t cover every component, the visibility provided can help organizations better detect and protect from this threat.
ZeusVM: Bits and Pieces (PDF)
We keep a close eye on tweets that mention CloudFlare because sometimes we get early warning about odd errors that we are not seeing ourselves through our monitoring systems.
Towards the end of August we saw a small number of tweets like this one:
indicating that trying to browse to a CloudFlare customer web site using the Twitter in-app browser was resulting in an error page. Which was very odd because it was clearly only happening occasionally: very occasionally.
Luckily, the person who tweeted that was in the same timezone as me and able to help debug together (thanks James White!); we discovered that the following sequence of events was necessary to reproduce the bug:
Click on a link in a tweet to a web site that is using an https URL and open in the Twitter in-app browser (not mobile Safari). This site may or may not be a CloudFlare customer.
Then click on a link on that page to a site over an http URL. This site must be on CloudFlare.
BOOM
That explained why this happened very rarely, but the question became... why did it happen at all? After some debugging it appeared to happen in Continue reading
One of my readers recently pointed me to a blog post written by Andrew Lerner from Gartner describing the drawbacks of stretched VLANs.
TL&DR: He’s saying more-or-less the same things I’ve been preaching for years. Now I can put Blessed by Gartner logo on my blog posts ;), and you can use the report to sway your CIO.
Read more ...“Learning about and avoiding impairments (delay, loss, jitter) along the path that business critical traffic takes.” That is what I wrote in my previous blog “IWAN’s Intelligent Path Control & Using Your Backup Link.” But how is that possible to do?
Thinking some type of probe? From where to where? Thinking the WAN edge links? But how do you know the path you send your probes over is the path that your business critical traffic is taking?
Let’s talk about what I mean by this by looking at an example.
In the above picture we have 2 sites with 1 host per site, and 1 WAN connection between the two.
Let’s say you check the health of the path between Branch2 and the Hub Site with some type of probe/IP SLA. You will be doing it from the 2 WAN IP addresses 21.21.102.3 and 21.21.1.2. Right? Continue reading
A pre-VMworld tradition, v0dgeball is a charity dodgeball tournament that drew 16 teams eager to bean each other in the ankles.
I serendipitously found this fascinating reply by Richard Farley, your friendly neighborhood meter reader, in a local email list giving a rare first-hand account of how the Advanced Metering Infrastructure works in California. This is real Internet of Things territory. So if it doesn't have a typical post structure that is why. He generously allowed it to be reposted with a few redactions. When you see “A Major US Utility”, please replace it with the most likely California power company.
Old mechanical meters had bearings that over time wore out and caused friction that threw off readings. That friction would cause the analog gauge to spin slower than it should, resulting in lower readings than actual usage -- hence "free power". It's like a clock falling behind over time as the gears wear down.
For A Major US Utility "estimated billing" happens when your meter, for whatever reason, was not able to be read. The algorithms approved by the CPUC and are almost always favorable to the consumer. A Major US Utility hates to have to do estimated billing because they almost always have to underestimate based on the algorithms and CPUC rules. Not 100% sure about this, but if they Continue reading
Original content from Roger's CCIE Blog Tracking the journey towards getting the ultimate Cisco Certification. The Routing & Switching Lab Exam
Well the post that I have been dreaming of writing since the start of this blog is actually being written. I passed the CCIE Lab Exam in Routing and Switching v5 in Brussels last week and am now CCIE #50038 It has been a journey and as readers of this […]
Post taken from CCIE Blog
Original post I passed the CCIE Lab Exam in Routing and Switching v5!