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Archives for August 2017

Response: What Drives Change in Enterprise IT – Jeremy Filliben

By Filed Under: Response

Sometimes there is no need to change anything in Enterprise IT ?

The Packet Pushers asked me to join a moderated panel with the topic “Can we Accelerate Change in The Enterprise?” This spurred me to think: Why does the Enterprise need to change? Once we build a great IT environment, why can’t we just sit back, drink our coffee and hammer TCP 80 all day long? I came up with five broad categories; presented in no particular order. Well, almost no particular order. I saved the worst for last. The examples below will be networking-centric, but the general concepts apply to most IT silos.

Interesting thoughts.

Jeremy Filliben – Pristine Packets CCDE Training: What Drives Change in Enterprise IT

Startups have Screwed Up Work Culture

By Filed Under: Blog

Dan Lyons talks about the negative side of startups that look cool but

  1. burn out and churn out
  2. Use terms like “graduation” instead “fired” while demanding loyalty from you but give you none in return.
  3. Bad management is the normal because obedience, stupidity and motivated gets promoted.
  4. You won’t make money.
  5. Average length of employment is less than 18 months

 

How to Completely, Totally, Absolutely Screw Up Your Company’s Corporate Culture

 

Dictionary: Grayfield

By Filed Under: Dictionary

Set your brownfield on fire and build the next generation of infrastructure on the ashes.

Note: This is how pubic clouds refresh their data centres. Each location has multiple ‘data centres’ and its dismantled before being rebuilt.

Private Cloud Electricity – Owning Your Power Supplies

By Filed Under: Blog

I was once told that clouds are like electricity but for computer power. Why are they installing private electricity generation to avoid using the scaled -up, scale-out ‘cloud-like’ public electricity supply ?

Equinix has signed a 15 year Power Purchase Agreement (PPA) with a subsidiary of Southern Company that will see Bloom Energy fuel cells installed at 12 of its US data centers.

Have noticed many of these deals lately and most data centre operators are now generating some signficant percentage of the power needed to run their facilities

Equinix to install Bloom Energy fuel cells at 12 data centers | News | DatacenterDynamics : http://www.datacenterdynamics.com/content-tracks/power-cooling/equinix-to-install-bloom-energy-fuel-cells-at-12-data-centers/98804.article

RFC 8229 TCP Encapsulation of IKE and IPsec Packets

By Filed Under: Blog

This RFC documents the use of TCP instead of UDP for the IKE. A substantial number of ISPs are blocking UDP at the edge of their network and this will cause IPsec to break. I’m guessing this is a simple fix to the many different types of UDP reflection attacks on DNS, NTP and SNMP that we have seen. A poor mans DDOS prevention, if you will. Another reason is that many NAT gateways don’t handle UDP predictably.

(55KB) This document describes a method to transport Internet Key Exchange Protocol (IKE) and IPsec packets over a TCP connection for traversing network middleboxes that may block IKE negotiation over UDP. This method, referred to as “TCP encapsulation”, involves sending both IKE packets for Security Association establishment and Encapsulating Security Payload (ESP) packets over a TCP connection. This method is intended to be used as a fallback option when IKE cannot be negotiated over UDP.

The increasing use of QUIC to replace the TCP/TLS/HTTP2 stack should lead to an interesting situation where UDP will, eventually, be unblocked. QUIC uses slightly less bandwidth thus giving ISPs a motivation to make the change. It will probably take about 5 years to catch on given how slowly your average ISP changes.

https://www.rfc-editor.org/rfc/rfc8229.txt

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