Archive for the ‘networking’ category

NetApp Certification Options

September 30th, 2011 Boris TulmanLeave a comment

In the world of certifications, there are generally a few that are common knowledge among the general IT networking world: Cisco’s CCNA and CCSP certifications, for example, are known to the majority of the IT world, as are certifications like Microsoft’s MCP program or the A+ certification for desktop support specialists. There are, however, other certifications out there that are definitely worth looking at; certifications that, while not as well-known as some of the above, are great certifications that will help you specialize in a field or niche that you’re interested in: One of these, for example, is NetApp; they specialize… View full post »

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Categories: netapp

Tags: netapp certification

Cisco vs. Juniper For Your Network

August 26th, 2011 Boris TulmanLeave a comment

To a network administrator planning out his first enterprise-level network, hardware is crucial: you need hardware that can run for years without downtime, almost never fail, and have an OS and features that will let you perform the most complex and convoluted networking hoops that unforeseen problems and/or management will inevitably make you run through. For many years, and for many experts, there has always been only one provider that can accomplish all of the above without fail: Cisco Systems. Though Cisco has been entrenched as the networking king for many years, another name has appeared in the running for… View full post »

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Categories: cisco, networking

Tags: cisco, juniper

Brand Name Switches: Worth the Cost?

January 25th, 2011 Boris TulmanLeave a comment

The vast majority of network administrators have their preferred networking vendor. Whether it’s Cisco, Juniper, or HP, you’ll often hear the same old chestnuts come down from the server room. Very often, the search for a good switch is drowned out by two sides – those who insist you have to pay dearly for quality, and those who insist a switch is a switch, and the 48-port gigabit offering from anywhere is going to suit you just fine. In today’s IT world, the answer matters quite a bit. There is a very understandable need, especially in the recent years, of saving… View full post »

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Categories: networking

Tags: network management, networking

Google Public DNS – Performance and Security

January 5th, 2011 Michael DorfLeave a comment 3 comments

DNS is necessary for the Internet to function properly. Unfortunately, poor network performance from DNS servers can slow down the browsing experience. While performance problems are serious, DNS is also vulnerable to even more serious security threats such as cache poisoning. Typically, the DNS servers used for browsing the Internet are either the ones run by your Internet provider or servers that you run which forward requests to the root servers (i.e. a caching-only nameserver). Fortunately for your performance and your security, there is another option. Google runs a public DNS system where you can… View full post »

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Categories: google, networking

Tags: dns, google

Best Free Android Apps for Network Professionals

October 28th, 2010 Boris TulmanLeave a comment 1 comment

Network professionals often find themselves on call. All too often, something simple pops up during these on-call periods that could be quickly resolved with the right tools. As a result, many network professionals find themselves lugging around a laptop “just in case”. However, Android phones are now capable of running a number of network applications that can greatly simplify those quick fixes. While they won’t replace the PC versions and they won’t always solve your problem, these 7 applications are indispensable to a network professional and may even save you from dragging out your laptop. Ping This handy… View full post »

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Categories: android, networking

Tags: android, android apps, networking

IPsec Site-to-Site VPN Best Practices

September 22nd, 2010 Boris TulmanLeave a comment

It has been a common case for enterprises to implement a site-to-site VPN solution to connect its central office to remote offices. In some cases when leased line is the primary path between the two locations, site-to-site VPN can serve as a backup solution if primary path is to fail. Obviously, if you have to select the right site-to-site VPN solution today, there are lots of options out there with companies like Cisco and Juniper dominating that market. In order to build the right and affordable solution – you should thoroughly analyze your requirements. Will you require a built-in redundancy and… View full post »

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Categories: networking

Tags: IPsec VPN, networking

Out-of-Band Management of Data Center Infrastructure

August 29th, 2010 Boris TulmanLeave a comment

We recently had a client who asked us to implement the simple and cost effective solution for Out-of-band management for their production data centers. The goal of Out-of-band management is to have a network access to the critical data center infrastructure when company’s network is melted, preventing you to access any devices for troubleshooting purposes. In other words this is meant to be company’s alternative way of accessing data center critical devices. The simplest solution, that we actually ended up implementing, was a static DSL line from a local ISP provider, terminated on Cisco 2611 router, using PPPoE protocol. Cisco 2611… View full post »

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Categories: networking

Tags: Cisco Console server, Console Management, Data Center Infrastructure, Out-of-Band Management, PPPoE

In-Band and Out-of-Band Network Management

May 18th, 2010 Boris TulmanLeave a comment

One of the best practices managing your production network devices is to have both, an in-band and out-of-band system management in place. An in-band management involves managing devices through the common protocols such as telnet or SSH, using the network itself as a media. It is a common way that provides identity based access controls for better security. By doing so, it is also a good practice to segregate your management traffic from your production customer traffic. If your network is for example congested due to the real user traffic – you will at least be able to login… View full post »

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Categories: networking

Tags: in-band, network management, out-of-band

Internet Service Provider Reliability

May 17th, 2010 Boris TulmanLeave a comment 1 comment

If you are in the business where your services are heavily dependent on your network, your business could be as strong as or as weak as your Internet Service Provider, or ISP for short. Shopping for your ISP service, whether it is a dedicated circuit between your offices or an internet access could be quite a journey. The most important factor to consider when trying to sign up for an ISP service is service reliability. The tricky part here obviously is the fact you are agreeing to pay for service that you can only guess about how reliable it’s going… View full post »

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Categories: networking

Tags: internet service provider, isp

Open Source Network Management Tools

April 9th, 2010 Boris TulmanLeave a comment

Computer networks today have grown in size and complexity. Monitoring and managing the various servers, routers, switches and other devices that make up a modern network is a daunting task. In the enterprise space, several vendors have created robust suites of tools to simplify this process such as HP OpenView and IBM Tivoli. However, what many do not realize is that there are many capable and robust suites of open source networking tools available to simplify network management and monitoring at the fraction of the cost of those expensive enterprise solutions. These open source networking suites… View full post »

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Categories: networking

Tags: network management tools, network monitoring, open-source

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