Tag Archives: that’s

Are SD-WAN security concerns warranted?

Are software-defined WAN security features sufficient to handle the demands of most enterprises? That’s the question addressed by author and engineer Christoph Jaggi, whose SD-WAN security concerns were cited in a recent blog post on IPSpace. The short answer? No — primarily because of the various connections that can take place over an SD-WAN deployment.

“The only common elements between the different SD-WAN offerings on the market are the separation of the data plane and the control plane and the takeover of the control plane by an SD-WAN controller,” Jaggi said. “When looking at an SD-WAN solution, it is part of the due diligence to look at the key management and the security architecture in detail. There are different approaches to implement network security, each having its own benefits and challenges.”

Organizations contemplating SD-WAN rollouts should determine whether prospective products meet important security thresholds. For example, products should support cryptographic protocols and algorithms and meet current key management criteria, Jaggi said.

Read what Jaggi had to say about the justification for SD-WAN security concerns.

Wireless ain’t nothing without the wire

You can have the fanciest access points and the flashiest management software, but without good and reliable wiring underpinning your wireless LAN, you’re not going to get very far. So said network engineer Lee Badman as he recounted a situation where a switch upgrade caused formerly reliable APs to lurch to a halt.

“I’ve long been a proponent of recognizing [unshielded twisted pair] as a vital component in the networking ecosystem,” Badman said. Flaky cable might still be sufficient in a Fast Ethernet world, but with multigig wireless now taking root, old cable can be the source of many problems, he said.

For Badman, the culprit was PoE-related and once the cable was re-terminated and tested anew, the APs again worked like a charm. A good lesson.

See what else Badman had to say about the issues that can plague a WLAN.

The long tail and DDoS attacks

Now there’s something new to worry about with distributed denial of service, or DDoS, attacks. Network engineer Russ White has examined another tactic, dubbed tail attacks, which can just as easily clog networking resources.

Unlike traditional DDoS or DoS attacks that overwhelm bandwidth or TCP sessions, tail attacks concentrate on resource pools, such as storage nodes. In this scenario, a targeted node might be struggling because of full queues, White said, and that can cause dependent nodes to shut down as well. These tail attacks don’t require a lot of traffic and, what’s more, are difficult to detect.

For now, tail attacks aren’t common; they require attackers to know a great deal about a particular network before they can be launched. That said, they are something network managers should be aware of, White added.

Read more about tail attacks.

For Sale – Corsair HX1200 PSU

Selling a Corsair HX1200 that’s been sitting on the shelf for too long now. Bought in Nov 2017 from Scan so still has warranty remaining.

As new condition and only used for a month or so, with full box and papers etc.

Looking for £140 inc special delivery

Price and currency: 140
Delivery: Delivery cost is included within my country
Payment method: Cash or Bank Transfer
Location: Ingatestone, Essex
Advertised elsewhere?: Not advertised elsewhere
Prefer goods collected?: I have no preference

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Wanted – Good spec Laptop for £200 tops Essex area

Looking for a Laptop for the family so i can retire my old Win Xp Toshiba.

Would like something thats able to run games like Roblox and Fortnite for my son and run all the obvious Microsoft applications with ease.

Would rather cash on collection in and around the Herts essex area

£200 is my budget

Thanks

Location: Harlow essex

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DO NOT proceed with a deal until you are completely satisfied with all details being correct. It’s in your best interest to check out these details yourself.

Wanted – Good spec Laptop for £200 tops Essex area

Looking for a Laptop for the family so i can retire my old Win Xp Toshiba.

Would like something thats able to run games like Roblox and Fortnite for my son and run all the obvious Microsoft applications with ease.

Would rather cash on collection in and around the Herts essex area

£200 is my budget

Thanks

Location: Harlow essex

______________________________________________________
This message is automatically inserted in all classifieds forum threads.
By replying to this thread you agree to abide by the trading rules detailed here.
Please be advised, all buyers and sellers should satisfy themselves that the other party is genuine by providing the following via private conversation to each other after negotiations are complete and prior to dispatching goods and making payment:

  • Landline telephone number. Make a call to check out the area code and number are correct, too
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DO NOT proceed with a deal until you are completely satisfied with all details being correct. It’s in your best interest to check out these details yourself.

For Sale – HP Chromebook – £70

Hi Guys,

Having a bit of a clearout, up for sale is my chromebook thats had very little use.

specs: Tesco direct: HP 14-x000na, 14″ Chromebook, nVidia Tegra K1, 2GB RAM, 16GB SSD – Blue

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comes with laptop and charger. small mark on the top by the chrome logo however looks like it should clean off.

No box so this will need to be collected

Price and currency: 70
Delivery: Goods must be exchanged in person
Payment method: cash on collection, BT
Location: Windsor, Berkshire SL4
Advertised elsewhere?: Advertised elsewhere
Prefer goods collected?: I prefer the goods to be collected

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Please be advised, all buyers and sellers should satisfy themselves that the other party is genuine by providing the following via private conversation to each other after negotiations are complete and prior to dispatching goods and making payment:

  • Landline telephone number. Make a call to check out the area code and number are correct, too
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DO NOT proceed with a deal until you are completely satisfied with all details being correct. It’s in your best interest to check out these details yourself.