• TCP monitoring: Definition & Details

    What is the purpose of TCP monitoring?

    The TCP monitoring report displays the cumulative efficiency of all TCP connections over time. It will wait for the TCP connection to be established for any TCP application before sending the request string and watching for the server to deliver the desired content. The health check will be successful as soon as a TCP connection has been established, even if no client request and server response are defined. 

    In addition, application, internal host, and external host categories are all options for the report data. You may dive down onto certain hosts or apps to see how well they handle a certain type of traffic.

    This report provides answers to issues like:

    • Do TCP inefficiencies cause the network delays we’re seeing?
    • Is a specific host or application experiencing issues as a result of retransmissions?

    How does TCP monitoring perform?

    Interoperable communication via the Internet between physically distinct computer systems is made possible by TCP/IP protocols. A TCP Monitor ensures the smooth operation of this communication process. Typically, the Transmission Control Protocol Monitoring process consists of the following three steps:

    1. Finding: To get a good view of your network traffic, you must first become familiar with your network, devices, and IP addresses. A network map can be made using tools like Server & Application Monitor.
    2. The following action is to regularly check your applications’ network connections to find any performance concerns.
    3. Troubleshooting: Now is the time to address any issues that arise using the knowledge that your TCP Monitoring system has gathered.

    Which TCP Port to choose?

    A device is connected to the network if we can ping it. The next step is to confirm that the device’s services are active. On a network device known as a port, all standard apps execute. These ports are either TCP or UDP.

    You may determine whether the service is active on the network device by activating a TCP Check. For instance, a web server serves as the host for all websites. These web servers run on TCP Port 80 by default. So, by configuring a TCP Check on Port 80, we are determining whether the network device’s web server service is active. In addition, several TCP Ports are used for file transfers, such as File Transfer Protocol ports 20 and 21, SMTP port 25 and IMAP port 143 for emails, and Secure Shell port (22).

    Most apps operating on a network device can be configured with TCP monitoring using a list of regularly used TCP and UDP port numbers. 

    3 Reasons to use Monitoring service

    Conclusion

    Congratulations! You are now familiar with TCP monitoring, which is a really useful feature of the Monitoring service. So, what is your next step? To look for a good provider and to take advantage of it. Good luck!

  • Do you desire more information on DNS attack types? You are in the appropriate location if the answer is yes. Today’s post will examine the four most prevalent ones and how to combat them. However, let’s first define what a DNS attack is.

    What does a DNS attack aim to achieve?

    What precisely falls under a DNS attack? The term refers to a class of cyberattacks in which malicious hackers target an organization’s DNS servers, which hold desired domain names. They can carry out the assaults described below when they possess specific domain names. Bad actors may also search a system for holes they may use to their advantage.

    4 most common DNS attack types

    1. DNS cache poisoning

    DNS spoofing, also known as DNS cache poisoning, refers to operations that aim to smuggle altered entries into name servers’ DNS caches. Attackers change the relationship between domain names and their corresponding IP addresses in this way, causing visitors to access a phony website that is typically dangerous.

    1. DDoS Amplification 

    A DNS assault like this one aims to increase traffic to uncontrollable levels. There are numerous implementations, however, the UDP protocol is usually used to interfere with your DNS. Thieves submit a DNS request to gain the IP address and more DNS information (records) because UDP does not validate, guaranteeing a tremendous response.

    1. DNS Tunneling

    In order to encrypt (tunnel) malware and other information in DNS queries and responses, this DNS attack takes advantage of the DNS (client-server way). Other protocols are used in this assault to pass DNS requests and responses. Using TCP, HTTP, or SSH, hackers can inject malware or exfiltrated data into DNS queries.

    1. DNS hijacking

    DNS hijacking is altering a user’s DNS requests such that they are redirected to a chosen target by the attacker. To steal money from targets’ bank accounts, use credit cards fraudulently, sell personally identifiable information on the dark web, and carry out other nefarious activities, cybercriminals deploy DNS attacks and hijacking tools.

    Hackers can employ DNS hijacking to support other cyberattack strategies like phishing and pharming (display unwelcome adverts to make money).

    How do you go up against DNS attack types?

    You now know how harmful DNS attacks are. Here are some ways to deal with them:

    • Keeping an eye on the traffic. Monitoring incoming and outgoing requests is the first step in discovering anomalies. Your answer data’s context information also makes it possible to conduct a more thorough forensic investigation.
    • DNSSEC approach. A DNS security extension is DNSSEC (Domain Name System Security Extensions). It offers DNS data that is transmitted via internet cryptographic authentication, demonstrating the data’s integrity and source.
    • Firewall. As your first line of security against invasions, strange DNS requests, answers, and patterns, install DNS-effective firewall software.

    Suggested article: What is a Private DNS server and why to use it?

    Conclusion

    Yes, DNS attacks can seriously damage your organization. The most common ones include DNS spoofing, DNS Tunneling, DDoS Amplification, and DNS Hijacking. Additionally, employ DNSSEC, a firewall, and keep an eye on the traffic if you wish to safeguard yourself against them. Luck!

  • 3 Reasons to use Monitoring service

    Monitoring service – What is it?

    Monitoring service is a large category of goods that allow analysts to evaluate whether IT equipment is online and working at expected levels while also correcting any discovered issues. It provides detailed information about the status of your servers, which you use for a variety of services such as web, email, DNS, and others. Monitoring service tools range from simple inspections to more powerful instruments that may assess a product’s performance in great detail and even automate repairs when faults are discovered.

    Amazing Monitoring service plans that are worth your attention!

    (more…)

  • Nowadays, most people and companies use Public DNS services instead of Private DNS server. This has its dangers. But before we find out what they are and why it is so important to switch to Private DNS, let’s see what a DNS server actually is.

    DNS server – What does it mean?

    In this global network, we distinguish many types of DNS servers (Authoritative DNS server, Recursive DNS server, etc.). However, they have one common function. The purpose of a DNS server is to translate the data sought by the user into information that computers can understand. To put it another way, its job is to translate the domain name example.com to its IP address 1.2.3.4. and then load the page. This process is called DNS resolution, and it requires many resources, one of which is the DNS server. 

    What exactly is a Private DNS server?

    As the title indicates, a Private DNS server seems to be something unique. Private DNS networks are those that aren’t connected to the Public DNS. Consider it a personal library with a small selection of books. This has both benefits and drawbacks. If you wish to read a specific type of book, however, you will be unable to do so. Although, there is one advantage: because your library is confidential, no one will know what you are reading.

    In other words, with Private DNS, you get an additional security encryption protocol. Indeed, it hides your query on the network. In technical language, we know these as DoT (DNS over TLS) and DoH (DNS over HTTPS).

    Critical components from the Private DNS server

    Now, two concepts are essential when we speak for Private DNS: Transport Layer Security (TLS) and Hypertext Transfer Protocol Secure (HTTPS).

    • Transport Layer Security (TLS) – The primary purpose of TLS is to secure two-way communication between a client and a server on one side and a server on the other. Furthermore, Transport Layer Security (TLS) has completely supplanted SSL (Security Socket Layer).
    • Hypertext Transfer Protocol Secure (HTTPS) – It produces encryption codes or session keys, which must be validated by a 3rd authority. Due to the system’s security, users who do not have authorization will not be able to access the information of others.

    As a result, we may claim that Private DNS encrypts queries using the TLS and HTTPS protocols. These are then transferred between the private network’s DNS server and the Public DNS server.

    Advantages

    A Private DNS server has a really huge amount of benefits. We will explore only one part of them. They are as follows:

    • It gives you more security! This is almost the most significant benefit of the Private DNS server. You may be more vulnerable to DoS and DDoS attacks if you use a public DNS server. However, if you employ a Private Domain Name System server, this is highly unlikely to happen.
    • Has almost all premium services. Yes, the Private Domain Name System server has nearly all premium features. For example, it could have Secondary DNS and Dynamic DNS.
    • More DNS zones and DNS records. You will be able to host as many DNS zones and DNS records as your server can handle. That is, you will be able to use all the DNS records you need (A, AAA, SOA, PTR, MX, TXT, CNAME, etc.).

    Recommended article: DNSSEC: Simple guide for beginners

    Conclusion

    A Private DNS server is your key move for a more professional image if someone tries to evaluate your URL. Furthermore, because you have complete control over the accessible IP addresses and network access, it improves security and cost-effectiveness. Frequently, your ISP’s public DNS servers record every DNS query you make, and this information is stored for years. If you don’t want this to happen, implement a Private DNS server.

  • The topic for our discussion today is DDoS protected DNS. This is absolutely incredible service. We will see why, what is its purpose, and where you can find it. But first, let’s explain what exactly is a DDoS attack.

    What is a DDoS attack?

    To easily understand the purpose of the DDoS protected DNS, we should explain what DDoS attacks are. They are a type of cyberattack in which bad actors use a variety of tactics to produce a large amount of traffic directed at a target in order to overload it. When the target can no longer reply to typical queries, it will deny service to newly connected users.

    DDoS protected DNS – Definition

    DDoS protected DNS is a service that provides a reliable network with a large number of servers strategically placed throughout the world. This solution will enable your DNS to withstand all types and sizes of DDoS attacks. In addition, it will defend you against several layer attacks (Layer 3, 4, 6, and 7), as well as analyze your traffic and implement automated DDoS mitigation techniques.

    What DDoS protected DNS offer?

    Depending on the DNS Hosting provider, this service offers different things. However, it includes a lot of benefits for your system. Some of them are as follows:

    • A deep examination of the traffic. It allows you to have a better understanding of traffic patterns and use them for comparison.
    • Software for taking action. You’ll be aware that you’re being attacked thanks to the prior way, but what will you do about it? By routing requests, filtering them, and providing an alarm system, actionable software is typically employed to prevent this.
    • Monitor on all incoming DNS traffic. If it identifies an irregular pattern, it may take various actions to avoid a potential DDoS attack on your website. Because of that, acknowledging the traffic is critical.
    • Load balancing. The massive volume that is heading your way may be too much for a single nameserver, but what about an extensive network of nameservers working together? Yes, you may balance traffic among all of your nameservers. The greater the number of points of presence provided by the service, the better. A wider network of DNS servers has a better chance of surviving an attack.

    Are DDoS attacks that dangerous?

    DDoS attacks come in a variety of forms and for a variety of reasons. Some attempt to temporarily disable your website or application. Others will keep attacking you and refuse to let you function unless you pay a ransom. Finally, some will attempt to steal data from your servers while the DDoS attack is active. So every single one of us should be worried, yes. But the easiest solution is to implement a DDoS protected DNS service that will essentially protect us from this.

    Where can you find DDoS protected DNS?

    DDoS protected DNS service can be found most often as a paid service from DNS Hosting companies. Already proven in the market are such as, Project Shield, ClouDNS, AWS Shield, Verisign, and many others.  

    Yes, there are many good firms that offer this service. So, make the right decision. But, first, think about your needs and whether you actually need it.

    What is a Private DNS server and why to use it?

    Conclusion

    You now know how dangerous a DDoS attack is for your website or application. However, it is absolutely possible to protect against it. How? By implementing the DDoS protected DNS service.

  • DNSSEC: Simple guide for beginners

    DNSSEC is an absolutely beneficial approach because its primary goal is security. In other words, it’s a DNS protocol Security Extension. So if you want to learn more about it and how it works, you are in the right place. So let’s start.

    DNSSEC – meaning

    DNSSEC stands for Domain Name Security Extensions. It is an excellent technique to give your domains an extra degree of security. DNSSEC service is an advanced DNS feature that associates digital signature (DS) records with DNS data. As a result, the legitimacy of the original domain name may be established.

    It was created with the goal of protecting Internet users from forged DNS data. A false or malicious address, rather than the actual address you wanted to visit, is an example of such a scenario.

    How does it work?

    DNSSEC is a trust chain that runs from the root level down, securing each step along the way.

    TLD is the key for the level below the root. The domain name’s TLD, and the subdomain’s domain name’s TLD.

    It employs cryptography to sign each zone with a private key which is decrypted with a public key. The private key should not be shared, and the public key will be contained within DNS records in the zone for the purpose of unlocking that zone.

    A recursive DNS server will receive DNS data as well as the public key when it requests it. It will use it to validate the data and unlock the DNS records. If it is unable to do so for some reason, the user will receive an error notice.

    Why is DNSSEC beneficial?

    Domain Name Security Extensions could be really advantageous. It has two main reasons why you need to implement it – data integrity and data authentication.

    • Data integrity – The DNSSEC technique allows recursive DNS servers to validate DNS data and determine if it is from the correct origin. They have the ability to display the data to the DNS client. If it isn’t, they can abandon it.
    • Data authentication – It’s critical to verify that the zone data comes from the correct authoritative name server. DNSSEC prevents rogue name servers from being redirected.

    How can you get it?

    DNSSEC is not automatically configured. However, it is simple to set up. It is a standard feature of the majority of DNS hosting firms.

    A significant proportion of domains are unable to use DNSSEC at all. Their total value, however, is insignificant. It can be used by well-known generic top-level domains (gTLDs) and country-code top-level domains (ccTLDs).

    To get started, simply log into your DNS hosting provider’s control panel and activate it. Then, for each DNS zone you wish, find DNSSEC and click “enable.” After that, you’ll have a DS (Delegation Signer) record, which you should put where your domain is registered.

    Recommended article: What is a Private DNS server and why to use it?

    Conclusion

    We infer that DNSSEC could be really advantageous. Why? Because it gives you additional protection. If you are a DNS administrator, you should implement this extra security feature. It will increase network security and may assist you in avoiding various problems associated with faked servers. So, don’t waste time and take it!