What is DNS Failover?

Whatever we do, there will be failures. The computer can break down; the connection can get saturated; a bug can cripple a server, or whatever other reason can lead to a big problem. But can a person stay 24-hour a day monitoring our DNS servers? There is a better solution, a service that will monitor your DNS traffic and act if there is a problem, and it is called DNS Failover.

DNS Failover service – How does it work?

DNS Failover explained

The DNS Failover is a system that monitors the traffic and event reaction that automatically switches your DNS records if a server goes down, so your visitors get a new IP address of another server that is still up.

That way, your domain will still be available through another IP address of one of the additional DNS servers.

First, there is a monitoring system. It could be checking the traffic or directly the DNS server with a command like a ping in a particular interval. In case there is too substantial traffic, or the DNS server stopped responding to the ping, an event will happen.

This event will trigger a reaction in your DNS. The reaction could be passive if you only want to get notified.

There is also a chance to set it up to deactivate the DNS record only.

The best is to replace the IP addresses.

Your DNS Failover will change the IP address in the DNS records and redirect to one of the rest DNS servers that are still up. If you have GeoDNS, you can have a server per continent, and if the one in Europe is down, the traffic will be redirected to the closest still working in Asia.

Some of the DNS Failover services have a mechanism to refresh the DNS records yet again when your previously down DNS server gets up and running again.  

Benefits of DNS Failover

  • Constant monitoring of your DNS. If there is a problem, you will know. You can choose what kind of monitoring to perform like ping, HTTP, HTTPS, TCP, and UDP. You can also decide which region you want to be monitoring.  
  • Stay up. Even if a server goes down, the load balancing mechanism will redirect the traffic to another IP address. And it will auto-update when the server gets up again.
  • Ease of use. Most DNS providers have a very easy DNS Failover setup procedure. You can set it up in no time and have a better DNS network.

Problems with DNS Failover

When a user visits a site, the DNS records (A, AAAA, or others) will be stored in the browser cache for the period that the TTL value indicates. If you have a DNS Failover, you want low TTL values, but there could be a time period, for example, 5-10 minutes, when your user’s DNS records will still direct to the server that is down.

The period is small, and you can lower the TTL values, but you should think about it.

Conclusion

It is an additional cost to your typical DNS plan, but being able to just stay relaxed, knowing that your DNS provider will react in case of a problem, is worth it. If you have a backup, your client will not have any problem, and you can check what happened to the server that is not responding when you have time.

What is Domain Parking?

To park a domain means you put it on hold. It’s like you get a domain name, but you don’t relate it with services (web hosting, email). You park it to use it later, so it just shows a landing or holding page on it. Commonly, it displays a message that can be your contact info or a specific reason for the domain to be parked, “under construction”.

Benefits of Domain Parking

Why use domain parking?

There are different reasons to consider this practice.

  1. Under development. You have a full-time job, but you get a great idea for an online business. You can’t dedicate all day to its development, but you don’t want to lose the domain name you already thought. What many people do is they buy the domain to reserve the name, and it gets parked to use later, when it’s ready. 
  2. Selling domains. It can happen that you only invested in buying the domain. You think you own an attractive domain name that potentially can be interesting for others. You park it, waiting for the right client to appear and pay you to get it.

This has become a profitable activity called domain flipping. Investors don’t buy one or five, but many different domain names to have a vast portfolio to offer to potential clients. So the only info they publish on every domain’s landing page is their contact data. 

  1. Prevention of cybercrimes. Domain squatting or phishing are common crimes that shady people practice through domains that use well known, trustable trademarks to abuse users. First, squatters know that no respected brand owner wants users to type their brand to finish in a strange website. So they try to sell those domains to the brand owner in really high amounts of money. Phishing works registering a domain with the name of a reputable brand. Then a copy of the official website is built there. Users are driven to the fake site, usually via active links attached in emails, for criminal purposes.

As a security measure, big companies register their brands with different TLDs (.com, .co, .net, .org, .de, .mx, etc.) to narrow criminals’ possibilities of registering alternative domains to cheat people. Once registered, the domains get parked.

  1. Publishing ads to get profit. Maybe you have experienced typing the website’s domain name, just to finish in a landing page full of different ads waiting for you to click them.

There are services that enable users to build an HTML page, with a parked domain to insert ads. It’s not a full website, just a page that generates passive income for the owner through the ad clicks.

  1. Domain expiration date. Sometimes domains get parked because owners are not using them anymore. Their hosting provider contracts are expired already, but domain names not yet.

This could be an opportunity if you are interested in the domain name. Maybe you just need to wait for it to expire. If the current owner doesn’t renew the registration, it could be yours without paying for it.

How to park a domain?

It’s easy, but it costs. You just choose the domain name you are interested in. If it’s available, you register it -through a domain registrar- and it’s yours.

You have to pay for the domain. To keep it, you have to renew the register yearly. Only owning it, you can keep it parked.

Then, using the control panel of the domain registrar, you can find the feature called “Domain Parking,” activate it, and fill in your information. 

Conclusion

Domain parking is a basic but useful feature, and it’s proof that depending on your personal and economic expectations, a single static page could be an opportunity profitable enough.

Dig command – how to use it?

The Dig command is one of the most popular NSlookup alternatives for Linux and macOS. Here we will show you how to use it for checking your domain and all its DNS records. 

What is the Dig command?

DIG is an abbreviation of Domain Information Groper, and it is a software with a command-line interface for domain probing. You can find the command on almost every Linux distro like CentOS, Ubuntu, Debian, Linux Mint, and more.  

10 Most used DIG commands

What is the Dig command used for?

The Dig command can perform various DNS queries and get information about different DNS records, including A DNS record, AAAA, MX, SOA, NS, PTR, and more. 

Use the Dig command to check for problems with your domain or the functionality of your services like FTP or emails. 

You can also regularly perform tests just to monitor your DNS performance. 

How to use the Dig command?

Start the Terminal on your Linux or macOS. Now we will explore a few examples, so you get a general idea of how to use it. 

Note that we will use ExamplePage.com as a target for all our examples and an imaginary IP address. You can change that part of the text in the following commands and put the one that you want to check. The same goes for the IP address.  

You will have 3-part output. You will see what your query (the question you asked), the result (answer), and statistics for it was. 

Dig an A record and get the IP address of the domain you are targeting. You can do it with a straightforward dig command that will show extra information:

dig ExamplePage.com

Or you can do it with the short version of the command that will show you just the answer (the IP address)

dig ExamplePage.com +short

Dig a MX DNS record and see the mail servers for a particular domain’s incoming emails. Check if they are well created because if they are not, you won’t be able to receive emails. 

dig ExamplePage.com MX

Dig a SOA record and find out which is the main server for the zone. 

dig ExamplePage.com SOA

Dig the TTL value and see for what amount of time does the recursive DNS servers keep the DNS records in their cache memory. 

dig ExamplePage.com TTL

Dig command to see all DNS records that a domain has. It could be useful for further diagnostic of each of them. 

dig ExamplePage.com ANY +noall +answer

Dig an IP address and backtrack it to the domain. You can use this command for reverse DNS check and see if you have set up your PTR records correctly. 

dig –x 123.123.1.123

Use a specific port for your dig request. You can set up a different port than the default one, port 53.

dig –p 51 ExamplePage.com

Dig a TXT record and see if you have set up your SPF, DMARC, or another security feature. 

dig ExamplePage.com TXT 

When you are using the dig command, you can set the DNS resolver you want to use and trace the route from there. See, in this case, we will use google (8.8.8.8) and see the hops of the query. 

dig @8.8.8.8 +trace ExampePage.com

Dig command options

If you want to master the Dig command, you can see the list of options that the dig command supports:

OptionInformation
-x dot-notationUsed for reverse DNS lookups (IPv4).
-iUsed for reverse DNS lookups (IPv6).
-f filenameUse a file for batch command.
-b address [#port]Bind to source address/port.
-p portChoose the port for the query.
-q nameQuery name. 
-t typeType specification.
-c classClass specification.
-k keyfileTsig key file specification.
-y [hmac:]name:keyName of a base64tsig key specification.
-4IPv4 only.
-6IPv6 only.
-mMemory usage debugging.

How does web hosting work?

If you plan to build a website or you are already looking for a web hosting service, you must read this.

Choosing a web hosting provider and a suitable plan is critical for you to succeed online. But many people don’t choose well, because they don’t clearly understand how this service really works. Of course, you can change provider and plan if your initial decision doesn’t work, but to migrate from service to service will take you time, effort, and money that, honestly, you can save. 

What is web hosting?

Servers are hardware with the necessary tech and software to host all the websites’ data.

Web hosting is a service that supplies storage space on a server for a website to exist on the Internet. All the files that compose your site, from code to text, images, and videos, need to be stored in a server to be available on the Internet. This makes it possible for other computers connected to the Internet to request the site.

Web hosting types

Most providers offer the following web hosting types:

Shared web hosting

This is the basic service (type) you can get. Your site will be hosted on a server where many more sites share space and server’s resources. So your site won’t live alone. Advantage, you pay a cheaper rate. The disadvantage, the sharing of resources. For instance, if other websites generate massive traffic, your website’s loading time could be affected.

This is a good starting point for small businesses or blogs with moderate traffic. 

Cloud web hosting

This web hosting stores your website not on one server but in a network of cloud servers (virtual and physical). 

Imagine a web composed of different interconnected computers. Each computer connected to the network supplies more resources to the cloud they integrate. This provides better uptime and a larger capacity for scaling than shared web hosting. Also, if a server shuts down or gets compromised, there are more servers your website can rely on, to work properly.

Still, what your neighbors do, affects you. 

This choice is a bit more expensive than shared hosting. It can be suitable for businesses with more significant traffic expectations and tech needs.

Virtual Private Server (VPS)

Every server offering this service gets split into more virtual servers. So, your website gets hosted in the same physical server with more websites, but every site lives in its own virtual server with its own resources guaranteed.

In this case, if other sites crash or experiment issues, doesn’t mean yours will be affected. Therefore, VPS can offer a better uptime rate, speed, and loading time. 

If you have tech skills to customize and develop a more proficient site, you need more resources, so VPS is a good option.

Dedicated web hosting

This service allows your website to live alone in its own, complete, dedicated server, without sharing space or resources. You will have the best uptime rates, consistent loading time, and speed.

Consider that, bigger the “house”, the more maintenance required and the more expensive the rate to pay.

You will also need an IT specialist who really understands the server and can manage it. 

This type of hosting is definitely for companies with high traffic, tech needs, and revenue. So they can afford it without trouble and really get a profit from such a service.

Find out more information about the Dedicated hosting!

Conclusion

Web hosting is a must if you want to go on the Internet with any kind of business. There is a type of web hosting suitable for every need. Depending on the type of service, the features you will get, and the price you will pay.

Linux Mint – why use it?

Are you tired of Windows 10 or macOS? Are you searching for something fast and exciting? What about the freshest Linux distro out there – Linux Mint! Let’s take a deep dive into Linux Mint and see all the great reasons to make it your primary OS, or at least your dual boot option.

What is Linux Mint?

Linux Mint is one of the popular Linux distros for home and office. It is based on another popular distribution called Ubuntu and can run pretty much everything for it too.

Linux MTR command – What is it and how to use it?

You can easily install it on many desktops and laptops. It can run on old hardware too, and the minimum requirements are x86-64 (32-bit version will soon be outdated) or arm64 processors, 1 GB of RAM, and 15 GB of storage space.

It is an ideal distribution for first-time Linux users. 

Why use Linux Mint – top Linux Mint benefits?

The top reasons to choose Linux Mint are price, performance, and customization, but let’s go into details:

  • Free. Yes, contrary to Windows 10, Linux Mint does not cost a dime. No cost for any update too. And most of the software is free too. You get an office suite, media player, photo editor, and communication applications for free out-of-the-box.
  • Performance. It uses fewer resources than macOS or Windows. Depending on the task, it could perform better than other Oses on the same hardware. 
  • Compatibility. It works on many different configurations. Yes, it is dropping 32-bit support, but we already made the jump to 64-bit processors in 2007-2008. It beat macOS, which supports olds computers too. 
  • Convenience. When you install Linux Mint, you will get all the drivers pre-installed*. Moreover, you will get a full set of applications that you can work on or have fun with. The desktop is similar to other OSes, and you will be using it smoothly in no time. 

*some hardware might not have drivers available

  • Customization. You can easily change many aspects of the user interface: the font, sizes, colors, and more. You can even change the whole desktop environment. Use Cinnamon, MATE, or Xfce. Get apps and widgets for it, and tweak Linux Mint the way you want.
  • Security. When we are talking about any Linux distro, you can make it a fortress if you like. Put Firewall, manage users and privileges, limit the access to the root, and more. You have full control of it. 
  • Privacy. Nobody is spying on you on Linux Mint. Not like Windows, where you are surveilled continuously. Apple says that they don’t track you, but who knows? On Linux, you and your data are safe, and nobody is tracking you. By default, your browser is Mozilla Firefox and DuckDuckGo as a search engine. 
  • Popular. Don’t forget this important point. Many people use Linux Mint, so you can find a lot of help online. This could be very helpful if you have trouble with drivers or install specific software that is not natively supported.
  • Updatable. You can easily update the whole OS, a separate part of the OS, or an individual software. You choose what and when with the update manager. And there won’t be any annoying updates that push you to restart immediately and last forever to install.

Conclusion

In general, using any Linux distribution is far underrated. Linux Mint is a great example of what it can offer. A great OS with an incredibly easy-to-use interface, built-in applications, and good performance.

Maybe the real question is not “Why to use Linux Mint?”, and it is “Why haven’t you installed Linux Mint already?”

5 hackers who made history

Originally, hacking had a positive connotation. Hackers were tech enthusiasts trying their creativity for optimizing, customizing, and tweaking. 

This changed dramatically when such “creativity” was used to breach security defenses from systems and networks to exploit them through stealing, altering, or destroying information. 

Currently, just to mention, the word “hacking” can get us goose gumps. We know how harmful it can be and that everybody can fall, governments, big and small companies, famous and common people.

Let’s check 5 modern hackers who made history!

Richard Pryce, “Kuji” and Matthew Bevan, “Datastream Cowboy”

1996, young 16 and 22 years old respectively, hacked several military networks, including Defense Information System Agency, Korean Atomic Research Institute (KARI), and Griffiss Air Force Base.

It was said, they almost began the third world war. They put KARI’s researches into the American military systems. USA’s concern was that it could be North Korea’s info so the USA could be blamed for espionage. In the end, it was South Korea’s.

Pryce claimed, for him hacking was a game. Bevan said he was trying to prove a conspiracy theory related to UFO. 

Michael Calce, “Mafiaboy”

2000, 15-year-old “Mafiaboy”took down the most popular search engine, Yahoo. And only one week later, he managed the websites of CNN, eBay, Amazon, E*Trade, and Dell to crash.

Calce overwhelmed their servers through a DDoS attack. Due to “Mafiaboy” attack, the USA took the need for cybercrime laws seriously. For President Clinton’s administration, this became a top priority.

Calce stated hacking was for him about getting respect from other hackers and not about money.

Adrián Lamo Atwood

Lamo was a threat analyst, journalist, and hacker. He was 20 years old (2001) when he added fake quotes by rewriting a text published by Yahoo from Reuters, using a content management tool. His attack exposed severe risks of news manipulation. 

In 2002, he hacked The New York Times’ intranet to research public figures.

Lamo directly informed the press about his attacks. Sometimes, he helped to fix the vulnerabilities that allowed him to get into the different systems for free. 

In 2010, Lamo reported Chelsea Manning, an American soldier, to investigators from the Army. Manning leaked sensitive USA government documents to WikiLeaks.

Jeanson James Ancheta, “Zombie King”

20-year-old, Jeanson was the first hacker sent to prison for using botnet tech. Yes, that software is based on robots (zombies) that are infected devices and are used to take computer systems later. First, he hijacked thousands of computers across the US. Military computers of two facilities included.

In 2005, he compromised around 400 thousand computers through bots. He earned money every time bots owners were pushed to download adware. He also used to charge for installing adware or bots on different systems.

SolarWinds cyber attack

In 2020, SolarWinds, provider of software and network monitoring services to thousands of worldwide companies, including big corporations and government agencies of North America, the Middle East, Europe, and Asia, suffered a massive cyber attack. 

Hackers sniffed in classified info from Pentagon areas, State Department, National Nuclear Security Administration, Treasury, Intel, Cisco, Deloitte, Microsoft, etc.

Malicious code was added to SolarWinds software “Orion”, used to manage IT resources in companies. A backdoor was created, so hackers set up more malware to get remote access and spy on thousands of “Orion” users.

The USA blames Russian hackers since they detected similar method on previous 2014 and 2015 attacks on the White House and State Department servers, credited to the Russian Intelligence.

We don’t know the author’s names yet, but watch out! Because they are definitely around.

What is dedicated hosting?

Shared hosting, cloud hosting, VPS… No, today we will speak about something better. Dedicated hosting is the king of the hill when we are talking about standardized types of web hosting. 

Dedicated web hosting is more expensive, but sure it has what to offer. Do you want to know more about it? 

What is dedicated web hosting? 

Dedicated hosting is a type of web hosting where the client rents a complete server (with OS, CPU, RAM, storage, etc.) for a period. The period could be days, months, or years. The client does not own the server and does not bother to pay utility bills for it or rent of space. The responsible for the server is the dedicated hosting provider. 

The server could be in a different country, and all the control and interaction with the server is through a secure connection. 

The price of dedicated servers is usually higher than shared or Cloud hosting, but it offers better performance. 

Dedicated hosting is a bit harder to scale than shared hosting, and it might take extra time. It will require somebody to attach the new part physically. It is not impossible, but just it is not as fast as just clicking a button. Some providers offer a hybrid with Cloud and instant upgrades. 

Web hosting explained

Pros of dedicated hosting

  • All the resources are just for you. Yep, the number 1 reason why dedicated hosting is so attractive to e-commerce owners is the performance. You don’t share anything. All the raw power of the computer is just for your needs. Perfect for a website with plenty of pages and many products. 
  • Do what you want with it. It is yours! You can host a site, create a mail server, use it as a DNS server. Whatever you want! You can choose the OS and what to install. Get all the tools you like and optimize the use. 
  • Security. You can install firewalls and protect the dedicated server the way you decide. There are many options. You can use additional methods to secure the connection to the server, limit the privileges of the server’s users, and more. 

Cons of dedicated hosting

  • It is expensive. There is no other way to say it. It is more expensive than most hosting types. This is why many prefer VPS (virtual personal server) that offer similar performance (or the same) but a bit cheaper. The prices are usually between hundreds and thousands of dollars per month. 
  • Responsibility. You have the whole server for yourself. Every change in the OS that you do could lead to downtime, and this is your responsibility. A mistake could cost you expensive, especially if users’ private data is involved. 
  • Hard to manage. You need an IT specialist to manage it. It is not as simple as other hosting types. The dedicated server will have its own OS, and you need a specialist who understands how to use it and maintain it. 

Conclusion

You should most definitely check dedicated hosting if your site is growing bigger. It will provide extra performance for the thousands of requests that are constantly going to your site. Just check the prices first. Shared and Cloud hosting most probably are far behind with their performance, but there might be some great VPS offers available. 

Also, think about the location well. You want your server dedicated to being close to your users for maximum speed. High latency might be as bad as slow performance.