Install the GNS3 network simulator version 1.x

The GNS3 development team produced a major new release, version 1.0, in October 2014. Since then, they have been regularly updating GNS3 and, at the time I write this, the latest version of GNS3 is version 1.3.7.

The latest version of GNS3 cannot be installed using a package manager like Ubuntu Software Center or Synaptic because no packages have been created yet for GNS3 1.x. The Ubuntu repository and the GNS3 PPA only provide packages for old versions of GNS3. The latest version of the GNS3 package for Debian/Ubuntu is GNS3 0.8.7.

The GNS3 development team is working on packages for GNS3 1.x but, as of the time I post this, it is not clear when they will be available.

To install the latest version of GNS3 on an Ubuntu Linux system, install the dependencies, download the GNS3 source files, and compile the software. I provide the list of commands in this post.

Install GNS3 on Ubuntu Linux

We will use GNS3 to build a simulated network consisting of open-source routers, switches, and hosts so we only need to install the GNS3 GUI, the GNS3 Server, and VPCS. However, in the sections below, Continue reading

Bitcoin glitch expected to abate as software upgrades continue

Bitcoin experienced a glitch over the weekend that is expected to be resolved as software clients that handle transaction data are upgraded.Some software clients that “mine” bitcoins are creating invalid transaction data, which are referred to as blocks. Blocks are records of transactions, and the first miner to complete a block is rewarded with new bitcoins. The blocks are added to bitcoin’s public ledger, called the blockchain.Some software clients that had not been recently upgraded are accepting invalid blocks created by other clients, according to a notice posted on bitcoin.org.To read this article in full or to leave a comment, please click here

IPv6 “RFP Requirements” – What do you include?

I was working with several peers in Asia over the last few years on big network build outs. As everyone should know, limited IPv4 space means you really need to engineer everything for IPv6 with IPv4 as the “extra” protocol. The real state of vendor IPv6 readiness was a shocker. It was rare to find […]

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Barry Greene

The post IPv6 “RFP Requirements” – What do you include? appeared first on Packet Pushers Podcast and was written by Barry Greene.

Show 244 – Design & Build #3 – Dual Stack IPv4 + IPv6

In this third entrant into the design & build series, Guilherme Goes & Jeff Carrell join Ethan Banks for a discussion of running IPv4 & IPv6 dual stack.

Author information

Ethan Banks

Co-host at Packet Pushers

Ethan Banks, CCIE #20655, has been managing networks for higher ed, government, financials and high tech since 1995. Ethan co-hosts the Packet Pushers Podcast, which has seen over 3M downloads and reaches over 10K listeners. With whatever time is left, Ethan writes for fun & profit, studies for certifications, and enjoys science fiction. @ecbanks
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The post Show 244 – Design & Build #3 – Dual Stack IPv4 + IPv6 appeared first on Packet Pushers Podcast and was written by Ethan Banks.

Uber throws in the towel in battle with French taxi drivers

Uber Technologies is suspending its UberPop service in France, after a bitter fight with taxi drivers who say the service breaks the law.The company plans to remove access to UberPop from its mobile app in France from 8 p.m. local time Friday, it said in a blog post.UberPop allows passengers to hail rides from unlicensed drivers and is similar to the Uber X service offered in the United States and other countries.Uber has been disrupting transportation markets around the world—nowhere more so than in Paris, where taxi drivers recently blocked highways and airport entrances with burning tires in protest at the company’s behavior. The protests also reportedly included attacks on Uber drivers, their vehicles and passengers. The taxi drivers are angry because, they say, UberPop breaches a new law on hiring vehicles with a driver that entered effect on Jan. 1.To read this article in full or to leave a comment, please click here

Your Docker Agenda in July

DockerCon 2015 Europe may be a few months away but there are plenty of Docker events and meetups coming up this month near you! Join your local (or online) Docker community to hear firsthand about cool Docker hacks and learn more … Continued

Five smartphones to look forward to

If you’re planning to buy a new smartphone this year, but haven’t bought one yet it might be better to wait a bit longer: Apple, Samsung Electronics and OnePlus are all expected to launch new models in the next couple of months.Here are some of the models you should see during the second half of the year:OnePlus 2While most of the products on this list (and their specs) are just rumors, Chinese smartphone maker OnePlus has been busy detailing its 2 model, which will be launched on July 27.So far, OnePlus has revealed the phone will have a fingerprint sensor and be powered by Qualcomm’s Snapdragon 810. The company is using an upgraded version of the processor, v2.1, that isn’t susceptible to the overheating issues that the first version reportedly suffered from, it said.To read this article in full or to leave a comment, please click here

Five smartphones to look forward to

If you’re planning to buy a new smartphone this year, but haven’t bought one yet it might be better to wait a bit longer: Apple, Samsung Electronics and OnePlus are all expected to launch new models in the next couple of months.Here are some of the models you should see during the second half of the year:OnePlus 2While most of the products on this list (and their specs) are just rumors, Chinese smartphone maker OnePlus has been busy detailing its 2 model, which will be launched on July 27.So far, OnePlus has revealed the phone will have a fingerprint sensor and be powered by Qualcomm’s Snapdragon 810. The company is using an upgraded version of the processor, v2.1, that isn’t susceptible to the overheating issues that the first version reportedly suffered from, it said.To read this article in full or to leave a comment, please click here

Ad fraud Trojan updates Flash Player so that other malware can’t get in

Someone call the malware antitrust commission: Recent versions of the Kovter ad fraud Trojan, which infects computers through Web-based exploits, close the door after themselves by updating Flash Player to the latest version.The new and somewhat surprising behavior was recently observed by a malware researcher known online as Kafeine, who specializes in tracking drive-by download attacks that use exploit kits.Kovter is used for so-called click or advertising fraud. Once installed on a computer, it hijacks the browser process and uses it to simulate user clicks on online advertisements in order to generate revenue for its creators.To read this article in full or to leave a comment, please click here

iPexpert’s Newest “CCIE Wall of Fame” Additions 7/3/2015

Please join us in congratulating the following iPexpert students who have passed their CCIE lab!

This Week’s CCIE Success Stories

  • Adrian McCaskill, CCIE #48071 (Wireless)
  • Hugo Dantas, CCIE #49174 (Collaboration)
  • Jocelyn Hamryszak, CCIE #49036 (Collaboration)
  • Ehsan Emad, CCIE #28551 (Data Center)
  • Jeremy Porter, CCIE #16273 (Wireless)
  • Filipe Gaspar, CCIE #48503 (Wireless)

We Want to Hear From You!

Have you passed your CCIE lab exam and used any of iPexpert’s self-study products, or attended a CCIE Bootcamp? If so, we’d like to add you to our CCIE Wall of Fame!

Blue Light Special: Ensuring fast global configuration changes

CloudFlare operates a huge global network of servers that proxy our customers' web sites, operate as caches, inspect requests to ensure they are not malicious, deflect DDoS attacks and handle one of the largest authoritative DNS systems in the world. And where there's software there's configuration information.

CloudFlare is highly customisable. Each customer has a unique configuration consisting of DNS records, all manner of settings (such as minification, image recompression, IP-based blocking, which individual WAF rules to execute) and per-URL rules. And the configuration changes constantly.

Warp speed configuration

We offer almost instant configuration changes. If a user adds a DNS record it should be globally resolvable in seconds. If a user enables a CloudFlare WAF rule it should happen very, very fast to protect a site. This presents a challenge because those configuration changes need to be pushed across the globe very quickly.

We've written in the past about the underlying technology we use: Kyoto Tycoon and how we secured it from eavesdroppers. We also monitor its performance.

DNS records are currently changing at a rate of around 40 per second, 24 hours a day. All those changes need to be propagated in seconds.

So we take propagation times Continue reading

Check 10Gb Interfaces On An ASA

I recently had to deploy and ASA pair. One of the pre-requisites is to make sure there’s an optic in the interface we’re going to use. On a switch you have the following options:

#show int te5/4 transceiver
Transceiver monitoring is disabled for all interfaces.

ITU Channel not available (Wavelength not available),
Transceiver is internally calibrated.
If device is externally calibrated, only calibrated values are printed.
++ : high alarm, + : high warning, - : low warning, -- : low alarm.
NA or N/A: not applicable, Tx: transmit, Rx: receive.
mA: milliamperes, dBm: decibels (milliwatts).

Optical Optical
Temperature Voltage Current Tx Power Rx Power
Port (Celsius) (Volts) (mA) (dBm) (dBm)
---------- ----------- ------- -------- -------- --------
Te5/4 27.0 0.00 7.6 -- -2.2 -2.7


Or

#show int tenGigabitEthernet 5/4 capabilities
TenGigabitEthernet5/4
Model: VS-S720-10G
Type: 10Gbase-SR
Speed: 10000
Duplex: full
Trunk encap. type: 802.1Q,ISL
Trunk mode: on,off,desirable,nonegotiate
Channel: yes
Broadcast suppression: percentage(0-100)
Flowcontrol: rx-(off,on),tx-(off,on)
Membership: static
Fast Start: yes
QOS scheduling: rx-(8q4t), tx-(1p7q4t)
QOS queueing mode: rx-(cos,dscp), tx-(cos,dscp)
CoS rewrite: yes
ToS rewrite: yes
Inline power: no
Inline power policing: no
SPAN: source/destination
UDLD yes
Link Debounce: yes
Link Debounce Time: yes
Ports-in-ASIC (Sub-port ASIC) Continue reading

Cisco leaves key to all its Unified CDM systems under doormat

Cisco Systems recently realized that its Unified Communications Domain Manager (Unified CDM) software contains a default privileged account with a static password that cannot be changed, exposing the platform to hacking by remote attackers.The Cisco Unified CDM is part of the Cisco Hosted Collaboration System and provides automation and administrative functions for the Cisco Unified Communications Manager, Cisco Unity Connection, Cisco Jabber applications, associated phones and software clients.The privileged account is created when Unified CDM is first installed and cannot be changed or removed without affecting the system’s functionality—although exactly how, Cisco didn’t say in its security advisory. The only solution, the company said, is to install the patches it released.To read this article in full or to leave a comment, please click here

Video: ISP IPv6 Transition Strategies

The responses of Internet Service Providers (ISPs) to lack of IPv4 address space range from outright denial (sometimes coupled with reassuringly-expensive large-scale carrier-grade NAT) to all-in IPv6-only designs using 464XLAT for residual IPv4 connectivity.

To understand the implications of these extremes and a few data points between them, watch the ISP IPv6 Transition Strategies video from Enterprise IPv6 – the First Steps webinar.

Watch the video

Samsung faces lawsuit in China over bloatware on phones

A consumer protection group in China is suing Samsung Electronics and a Chinese vendor for placing too many preinstalled apps on phones, and is demanding that the whole smartphone industry eschew bloatware.On Thursday, the Shanghai Consumer Council said it filed public interest lawsuits against Samsung and Oppo for not only placing so much bloatware on their phones, but also making it impossible for the user to easily remove the apps.The consumer protection group has been receiving a growing number of complaints, and found that these preinstalled apps can take up a phone’s storage or download data without the user’s knowledge. In response, the group has filed the lawsuits in a Shanghai court, as a way to discourage smartphone vendors from weighing their products down with pre-installed software.To read this article in full or to leave a comment, please click here

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