One-liner iptables rule to Filter NTP Reflection on Linux Hypervisor
Anybody annoyed enough with massive NTP monlist floods over the weekend? If you did like I did, I believe what immediately came to your mind was, “this shouldn’t have happened if they just had put a ‘default ignore’ line in their ntp.conf file!” But unfortunately there are some people who’re not like you, including casual […]
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The post One-liner iptables rule to Filter NTP Reflection on Linux Hypervisor appeared first on Packet Pushers Podcast and was written by Tamihiro Yuzawa.
Where Are All the Operators in the IETF Standards Process?
Network operators – service providers, enterprises, engineers, architects, data-centers, campuses, etc. – are responsible for keeping the packets flowing across their network(s). The Internet Engineering Task Force (IETF) designs, develops, and documents the standard protocols network operators use in and on their networks. In a perfect world, operators would be part of the IETF process […]
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CEF Secret Attributes, Part 3
In Part 1 we saw we can mark prefixes in CEF with certain attributes that might give us interesting things to play with. In Part 2 we found we could track traffic patterns with the traffic_index tag. We will now turn our attention to the qos-group parameters. Let’s say we would like four categories of […]
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The post CEF Secret Attributes, Part 3 appeared first on Packet Pushers Podcast and was written by Dan Massameno.
Review: OpenStack Deployment
Deploying OpenStack Ken Pepple OpenStack is a wide ranging initiative started by Rackspace and NASA in 2010 designed to provide open source software to build and manage IaaS cloud services. What’s often missing in open source projects like OpenStack is a definitive guide to the release schedule, the different pieces, how the different pieces interact, […]
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The Coffee Break – Show 1
This is “The Coffee Break”. A podcast on state of the networking business where we discuss vendors moves and news, analysis on product and positioning, and look at the business of networking. It's like a soundtrack for the network industry.
In the time it takes to have coffee break. Or so.
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The post The Coffee Break – Show 1 appeared first on Packet Pushers Podcast and was written by Greg Ferro.
The Coffee Break – Show 1
This is “The Coffee Break”. A podcast on state of the networking business where we discuss vendors moves and news, analysis on product and positioning, and look at the business of networking. It's like a soundtrack for the network industry.
In the time it takes to have coffee break. Or so.
The post The Coffee Break – Show 1 appeared first on Packet Pushers.
The Coffee Break – Show 1
This is “The Coffee Break”. A podcast on state of the networking business where we discuss vendors moves and news, analysis on product and positioning, and look at the business of networking. It's like a soundtrack for the network industry. In the time it takes to have coffee break. Or so.Using VRFs to maintain security zones in an Layer 3 datacenter network
The number of overlay technologies available today for the datacenter are numerous and highly functional. The flexibility they provide enables security zone enforcement and physical portability of hosts more seamlessly (among other benefits). However, a few risks in deploying popular layer 2 overlay technologies are vendor-lockdown, scalability, specialized hardware required to mitigate bottleneck points, and […]
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The post Using VRFs to maintain security zones in an Layer 3 datacenter network appeared first on Packet Pushers Podcast and was written by Paul Zugnoni.
Introducing Community Channel – Insert Your Podcast Here
A place for anyone to start a podcast with the Packet Pushers.
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The post Introducing Community Channel – Insert Your Podcast Here appeared first on Packet Pushers Podcast and was written by Greg Ferro.
Introducing Community Channel – Insert Your Podcast Here
A place for anyone to start a podcast with the Packet Pushers.
The post Introducing Community Channel – Insert Your Podcast Here appeared first on Packet Pushers.
Show 178 – Cisco Nexus 1000v and Microsoft Hyper-V
Cisco Nexus 1000V virtual switch for Microsoft Hyper-V and integrates with your existing Nexus 1000V deployment. In this episode we talk with Appaji Malla and Balaji Sivasubramanian from the Hyper-V Product team on the architecture of the product and platform.
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The post Show 178 – Cisco Nexus 1000v and Microsoft Hyper-V appeared first on Packet Pushers Podcast and was written by Greg Ferro.
Review: Cloud Architecture Patterns
Cloud Architecture Patterns Bill Wilder Networks support applications. Okay, that might seem a little obvious, but it needs to be said from time to time. In that vein, I often find it useful to get a better grip on the applications people are putting on networks, and how they expect the network to behave. In […]
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FAT or Entropy Label?
In this article we are going to see two features that improve the load-balancing in the MLPS Core. Why? In the networking when dealing with redundancy of links or paths we are facing the polarization issue. This problem happens when one of the link is congested. Let’s take the example of LAGs, if the hashing […]
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The post FAT or Entropy Label? appeared first on Packet Pushers Podcast and was written by Youssef El Fathi.
Restoring Trust in the Internet – Part 1
The Internet has a trust problem. With the recent revelations of government surveillance, traffic interception and modification, compromised products, and suspect algorithms, we have serious problems. Greg and Ethan spoke to this briefly on Show 175 regarding the pwning of several firewall products by the NSA, but the issue goes much further than just compromised […]
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The post Restoring Trust in the Internet – Part 1 appeared first on Packet Pushers Podcast and was written by Jonathan Strine.
One leg too few? Architectural Best Practice on SSL VPNs
A couple of times in the past month I’ve been asked where a SSL VPN appliance should be deployed in relation to the firewall. In both cases it was relating to the Juniper Secure Access / MAG platform, but best practice should apply equally to any IPSEC or SSL VPN platform, so I thought it […]
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The post One leg too few? Architectural Best Practice on SSL VPNs appeared first on Packet Pushers Podcast and was written by Glen Kemp.
Show 177 – Current Practices
More Engineers talking about their day-to-day problems. We found Justin Seabrook Rocha and Shawn McGuire lurking in the #PacketPushers ITC channel complaining about stuff. Now they are doing it in front to a microphone. Bring the real world to your real world. Guests Shawn McGuire bigbash on the #Packetpushers channel on irc.freenode.net Twitter : @mcguiresm Blog: http://8bitsbytes.com […]
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The post Show 177 – Current Practices appeared first on Packet Pushers Podcast and was written by Greg Ferro.
The Secret Sauce for Network Services
Tunneling is the Duct Tape of Networking..It is interesting to realize that a big chunk of network features in Data Center, Service Providers and Enterprises use tunneling in one form or another..It would be fun to imagine a “world” without tunnels! Most known MPLS applications are tunneling techniques, for instance in a VPLS/L3VPN Scenario the […]
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The post The Secret Sauce for Network Services appeared first on Packet Pushers Podcast and was written by Karim Jamali.
Please Fill Out Our 2014 Audience Survey
Packet Pushers is a big part of Greg’s & Ethan’s lives and the show is continuing to grow in 2014. We learn a lot, laugh a lot, and work hard to bring you the show every week and fresh content on the blog site. Despite enjoying editing and writing along with producing the podcast, the […]
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The post Please Fill Out Our 2014 Audience Survey appeared first on Packet Pushers Podcast and was written by Ethan Banks.
BGP Path Hunting/Exploration
Only one change or link flap can cause one hour or more traffic drop. It is weird, right? But this is true. In this article BGP Path Hunting/ Path Exploration behavior will be shown, BGP route flap dampening and its variants will be explained and how only one interface flap can cause very long down […]
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The post BGP Path Hunting/Exploration appeared first on Packet Pushers Podcast and was written by Orhan Ergun.
Show 176 – Intro to Python & Automation for Network Engineers
Network engineers keep hearing about Software Defined Networking (SDN) and wonder, “Will I have to become a programmer to keep my job?” The answer is, “Probably not.” However, there’s still an awful lot to be said for network engineers becoming familiar with the tools of network automation. There’s a gain in productivity to be had […]
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The post Show 176 – Intro to Python & Automation for Network Engineers appeared first on Packet Pushers Podcast and was written by Ethan Banks.