Datanauts 104: Migrating Exchange To Office 365
The Datanauts explore the business case for, and challenges of, migrating on-premises Exchange to Office 365. Our guest is Theresa Miller. The post Datanauts 104: Migrating Exchange To Office 365 appeared first on Packet Pushers.
Oracle’s Larry Ellison Says Companies are ‘Losing the Cyber War’
The cloud-based security system uses machine learning to detect threats and prevent attacks.
Send in the Robots: Platform9 Automates Serverless Workflow
Automated workflow allows serverless functions to be preloaded ahead of use.
New Standards Will Shore up Internet Router Security
The BGP Path Validation draft standards were designed to ensure that Internet traffic flows only along digitally signed, authorized paths.
Episode 13 – A Look In The Mirror
In episode 13, the Network Collective hosts go it alone and take an introspective look at the engineering community, warts and all. We dig into topics relating to ego, hero mentality, overconfidence, short memories, and the negative side of the hype cycle.
Outro Music:
Danger Storm Kevin MacLeod (incompetech.com)
Licensed under Creative Commons: By Attribution 3.0 License
http://creativecommons.org/licenses/by/3.0/
The post Episode 13 – A Look In The Mirror appeared first on Network Collective.
Episode 13 – A Look In The Mirror
In episode 13, the Network Collective hosts go it alone and take an introspective look at the engineering community, warts and all. We dig into topics relating to ego, hero mentality, overconfidence, short memories, and the negative side of the hype cycle.
Outro Music:
Danger Storm Kevin MacLeod (incompetech.com)
Licensed under Creative Commons: By Attribution 3.0 License
http://creativecommons.org/licenses/by/3.0/
The post Episode 13 – A Look In The Mirror appeared first on Network Collective.
Not Your Mama’s Security Architecture (Thwack)
It puts a firewall at the edge of the network or it gets the hose again. Think that’s still how security works? I don’t think so, my friend.
On the Solarwinds Thwack Geek Speak blog I look at how security architectures have changed from when our Mama used to create them, and I even take a moment to mention Greg Ferro (because, well, why not). Please do take a trip to Thwack and check out my post, “Not Your Mama’s Security Architecture“.
Please see my Disclosures page for more information about my role as a Solarwinds Ambassador.
If you liked this post, please do click through to the source at Not Your Mama’s Security Architecture (Thwack) and give me a share/like. Thank you!
DNS OARC 27
The DNS OARC meetings are an instance of a meeting that concentrates on the single topic of the DNS, and in this case it delves as deep as anyone is prepared to go! It's two days where too much DNS is barely enough!CCDE Practical Exam Dates 2018
Below is the CCDE Practical/Lab exam dates for 2018. As you might know there are four exam yearly. You can attend maximum four times. You don’t have to pass any exam other than CCDE Written Qualification exam to be able to attend CCDE Practical/Lab exam. For the cost, registration process , refund and […]
The post CCDE Practical Exam Dates 2018 appeared first on Cisco Network Design and Architecture | CCDE Bootcamp | orhanergun.net.
From Law School Dropout to Senior Network Engineer
Amy Arnold talks about her networking career and offers advice to aspiring networking pros.
Introduction to PAT- Port Address Translation
Today I am going to talk about PAT- Port Address Translation or so called as NAT overloading. Before we start with the PAT, please check the facts of NAT in the below mentioned link which i explained earlier.
NAT- Network Address Translation
Well with the above mentioned article link, let me brief you about the NAT is short bullet points
- Enables intra-networks that use private IP addresses to connect to the Internet by translating the address to a globally registered IP address.
- Stores mapping of local to global address in NAT table
- Increases network security by hiding internal IP addresses
- Typically operates at the border of a stub network (single connection to neighbor network)
- Private inside addresses = inside local
- Public addresses = inside global
Now let's talk about the PAT- Port Address Translation, below are the points about PAT
- NAT configured to advertise only one address for the entire internal network to the outside world “static PAT” or “address overloading” or “many-to-one”
- Appends a unique source port number to each translation to outside IP address
- Total number available internal addresses per 1 outside address is 65,536 ports
- Attempts to assign first available port number, if already allocated assigns Continue reading
Reducing the Number of Transported Routes
One of my friends sent me this design challenge:
Assume you’re migrating from another WAN transport technology to MPLS. The existing network has 3000 routes but the MPLS carrier is limiting you to 1000 routes. How could you solve this with MPLS?
Personally, I think MPLS is a red herring.
A better question would be “how do you reduce the number of routes transported across your WAN network” or “how do you reduce the routing interaction with your MPLS service providers” (particularly intriguing if you use more than one of them).
As always, there are several options and it’s impossible to recommend the best one:
- Readdressing is usually out of question (or at least too messy to try). It might also break numerous firewall rules and other hard-coded stuff… unless you automated everything, but then it wouldn’t be hard to readdress, would it?
- The usual answer would be to summarize the routes. The usual challenge is that you might not be able to do it (because random addressing). Furthermore, summarization is a lossy compression, and loss of forwarding information might result in black holes.
- RFC 1925 states that there’s nothing that cannot be solved with another layer Continue reading