NetFlow

Welcome to the 'NetFlow' tag page at Technorati. This page features content from the farthest reaches of the Blogosphere that authors have "tagged" with 'NetFlow'.

Latest blogosphere posts tagged “NetFlow”

• Cisco Catalyst 6509 Rap – Mix Master Mitch strikes again!

  
  Systrax — Authority: 124
  The holiday’s are nearly upon us, and in the spirit of giving, Mix Master Mitch has graced us with his latest rap video. This time around, Mitch decided to focus on setting up NetFlow on a Cisco Catalyst 6509 switch . Take a look. Read the lyrics Mix Master Mitch was also kind enough to give Systrax an ...
  16 hours ago

• NetFlow issues: Catalyst 6513 TCAM Tables

  
  Systrax — Authority: 124
  I was working with a customer at a University in the Northeast.  He was having some TCAM overflow issues with his Cisco Catalyst 6513 and was looking at the NetFlow exports to see if it could help him get a better understanding of the issue.   I’m not sure NetFlow can be used to trouble shoot the issue he ...
  1 day ago

• Top Ten NM Requirements (Take Two)

  
  Daily Network Monitor — Authority: 409
  About a month ago we posted a blog with a link to a white paper on the top ten requirements for a network and systems management solution. Not long after it was posted a WhatsUp Gold user commented and told us he was disappointed with our list. It didn’t provide him with the broader information of the ...
  2 days ago

• Scrutinizer v7.3 – Flow Analytics – Breach Attempt Violation

  
  Systrax — Authority: 124
  Well it looks like our run of nice weather has ended here in Southern Maine. Saturday we had our first snow of the year. It was kind of a nice touch to be at a holiday party and have the snow falling outside. And then to wake up Sunday morning to find that the view outside your window is like that of a Currier and ...
  2 days ago

• Best Practices In Network Behavior Analysis: Part 2 of 2

  
  Systrax — Authority: 124
  Here is part 1 of this blog . Detecting DDoS Attacks A DDos attack is a tricky monster because it can look like legitimate traffic. We have come up with an agorithm for detecting DDoS attacks that from our tests seems to be accurate.  We say this because it largely reduces the risk of false positives. It involves ...
  4 days ago

• NetFlow Configuration Cheat – Interface configs killing you? Let us help!

  
  Systrax — Authority: 124
  Happy Friday everyone! The other day I was working with a new customer getting NetFlow export enabled on his Cisco 3800 routers. When I was explaining the concept of using the ip flow ingress command in enabling NetFlow per interface, he said: “I have to do that on all my interfaces?!? I have like ten ...
  5 days ago

• Best Practices in Network Behavior Analysis: Part 1 of 2

  
  Systrax — Authority: 124
  Many companies are primarily concerned with Internet security threats.  I feel that majority of security threats are derived internally. According to Forrester Research, the majority of security breaches involve internal employees, with some estimates as high as 85 percent . What I want to point out today is that ...
  1 week ago

• Packet Loss via Netflow: MFSN

  
  Systrax — Authority: 124
  I saw this post on the caida.org site regarding “Is there enough information available to determine packet loss?” and I think often times what the consumer is looking for is packet loss on the network and not NetFlow packets that are lost. The reply was: Each router maintains a flow sequence number that is ...
  1 week ago

• Scrutinizer v7.3 – Flow Analytics – DNS Hits

  
  Systrax — Authority: 124
  Let me start by saying, I hope that everyone had a great Thanksgiving . At our house, we fried two turkeys this year. It was the first time that we attempted this, and after reading all the warnings that came with the new fryer, I guess the fact that no one got hurt means that the holiday was a success. Last week ...
  1 week ago

• I’ll be going to FloCon this year – are you?

  
  Jack Whitsitt: Art and Security in Washington, DC — Authority: 99
  In a bit of fun and interesting timing it turns out I’ll be going to flocon in New Orleans this January. Since I’ve spent the past 2-3 years doing business risk and security architecture, national sector level strategy, policy, etc….but now find myself getting into the technical details of building a CERT ( ...
  1 week ago

• What is Cisco NBAR

  
  Systrax — Authority: 124
  With the barrage of applications today sharing similar behavior characteristics at the protocol level, it becomes necessary to take deep packet inspection steps to determine what the actual application is that is causing the traffic.  Thankfully, Cisco already does this for us with something called Network-Based ...
  1 week ago

• Over 440 NetFlow exporting routers

  
  Systrax — Authority: 124
  A NetFlow collector that can scan is important for many of our larger customers . Nearly 500 of our customers are collecting Cisco NetFlow  and/or sFlow from over 100 devices. We understand that a NetFlow analyzer solution that can scale is important. Scrutinizer Scales I was working with a government customer ...
  2 weeks ago

• Scrutinizer v7.3 – Flow Analytics – Nefarious Activity

  
  Systrax — Authority: 124
  With the release of Scrutinizer v7.2 last month we offered an upgrade/migration path for those customers running Scutinizer v6. I have had some customers ask, “Why should we upgrade” or “What will we gain from Scrutinizer v7 that we don’t have now?” The updated release of Plixer’s network traffic ...
  2 weeks ago

• WAN Optimization Sizing

  
  Systrax — Authority: 124
  Apparently, many WAN Optimization companies price their appliances based on Flow Volume.  What does Flow Volume mean?  Flow Volume is the number of concurrent flows on a specific interface or all interfaces at any given time.  For example, if you download a web page, this could create several flows.  If you ping ...
  2 weeks ago

• What’s all the talk about NBAR?

  
  Systrax — Authority: 124
  With the release of Scrutinizer v7.3, we’ve been advertising the support of a couple of new filters that focus around reporting on NBAR . HURRAY! But in case you don’t know exactly what NBAR is or why its so very cool, lets take a step back and look at what it does for us: What is NBAR? First off, NBAR ...
  2 weeks ago

• Flexible NetFlow NBAR Support is Working

  
  Systrax — Authority: 124
  After a lot of work, we have support in Scrutinizer v7.3 with Flow Analytics for NBAR with Flexible NetFlow.  My contact at Cisco Jean-Charles  gave us some help. I wish we had him as a resident Cisco NBAR and NetFlow expert.    NOTE: You need to be using Cisco IOS v15 which just released in October of ...
  2 weeks ago

• Identify applications on the network using NBAR via Flexible NetFlow with Scrutinizer

  
  Systrax — Authority: 124
  Plixer International, developers of a market leading NetFlow and sFlow analysis tool set, today released Scrutinizer NetFlow & sFlow Analyzer version 7.3, bringing network traffic analysis software to the next level. With the latest release of their NetFlow analyzer , Plixer has introduced several new report ...
  3 weeks ago

• Vyatta supports NetFlow and sFlow

  
  Systrax — Authority: 124
  Looks like Vyatta has joined the mix of vendors supporting NetFlow and sFlow. According to the Vyatta press release , it requires an upgrade to VC6 of their operating system which is still in alpha development. This will make them the first company I’m familiar with that supports both technologies on the same ...
  3 weeks ago

• Setting up SSL for Scrutinizer v7

  
  Systrax — Authority: 124
  I have been receiving a number of calls lately with requests to enable SSL on Scrutinizer v7. Enabling SSL on Scrutinizer v7 has been made much easier than in past releases of Scrutinzer. You no longer need to download OpenSSL and manually configure the SSL Key and certificate, or set up the apache config files. You ...
  3 weeks ago

• Random thoughts about H.P. acquiring 3Com – Gimme the Netstream!

  
  Systrax — Authority: 124
  Just the other day, Brad Reese from Network World wrote a nice blog reflecting on the recent announcement of H.P. acquiring 3Com . With a huge announcement like this, naturally there are a lot of reactions and opinions. This kind of move may impact a lot of people and their current network strategies. But coming ...
  3 weeks ago

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