Show 311: Five Engineers And A Microphone
Todays show gathers 5 engineers around a microphone to talk about career paths and certifications, share war stories, debate the value of participating in social media and blogging, and more. The post Show 311: Five Engineers And A Microphone appeared first on Packet Pushers.
On DNS and DDoS
The global DNS infrastructure provides the critical function of mapping seeming random sets of numbers in IP addresses (like 1.1.1.1) to a name that an Internet consumer may recognize (like www.myfavoritestore.com). To scale to a global level, the DNS system was designed as a multi-level reference network that would allow any user on the Internet […]Dyn issues affecting joint customers
Today there is an ongoing, large scale Denial-of-Service attack directed against Dyn DNS. While Cloudflare services are operating normally, if you are using both Cloudflare and Dyn services, your website may be affected.
Specifically, if you are using CNAME records which point to a zone hosted on Dyn, our DNS queries directed to Dyn might fail making your website unavailable, and presenting a “1001” error message.
Some popular services that might rely on Dyn for part of their operations include GitHub Pages, Heroku, Shopify and AWS.
As a possible workaround, you might be able to update your Cloudflare DNS records from CNAMEs (referring to Dyn hosted records) to A/AAAA records specifying the origin IP of your website. This will allow Cloudflare to reach your origin without the need for an external DNS lookup.
Note that if you use different origin IP addresses, for example based on the geographical location, you may lose some of that functionality by using plain A/AAAA records. We recommend that you provide addresses for many of your different locations, so that load will be shared amongst them.
Customers with a CNAME setup (which means Cloudflare is not configured in your domain NS records) where the main Continue reading
Ericsson Hit with 3Q Net Loss, Paints Bleak View of 4Q
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DDoS Attack Causes Widespread Outages — Twice
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SDxCentral Weekly News Roundup — October 21, 2016
CoreOS announced that Redspread has joined the company to extend Kubernetes.
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Data Center Interconnect for Juniper Contrail (SDN Controller)
Juniper Contrail is Software Defined Networking (SDN) controller which automate the network provisioning in a Virtual Data Center. In traditionally server hyper-visor environment there is still need to configure and allow VLANs on Data Center switches ports connected with servers, which involves inordinate delays due to lengthy “Change Process” approval and dependency on many teams. But modern centers can not afford such delays for service provisioning as delay in service provisioning means lost of revenue.
The scope of this blog is to discuss:-
- How physical servers can talk with servers deployed inside SDN environment. .
- Layer 2 & Layer 3 Data Center Interconnect (DCI) solution between two enterprise Data Centers (DCs)
Above diagram shows architecture of Contrail , quick overview of Contrail inner working described below, please follow the link for Contrail in depth reading (http://www.opencontrail.org/opencontrail-architecture-documentation/)
- Contrail control node act as central brain.
- Contrail installs an instance of vRouter on each compute node.
- Each vRouter on a compute node creates separate VRF (Virtual Routing and Forwarding table) for each particular subnet for which a Virtual Machines are created.
- Full mesh MP-iBGP is configured by Contrail and all vRouters, Overlay tunnels (MPLS over GRE, MPLS over UPD or VXLAN used to Continue reading
Worth Reading: The psychology of bad passwords
The post Worth Reading: The psychology of bad passwords appeared first on 'net work.
Why Network Automation Needs DevOps
What used to take hours now takes minutes, or less.