Computer Network Security – Online Secure

Computer network security: Computer Network security combines multiple layers of defense at the edge and in the network. Each network security layer enforces policies and controls. Authorized users gain access to network resources, but malicious actors are prevented from committing exploits and threats.

Computer Network Security

Computer network security

Computer network security includes measures taken by businesses or some organizations to monitor and prevent unauthorized access from outside attackers

Different approaches to computer network security management have different requirements depending on the size of the computer network. For example, a home office requires basic Computer network security while large businesses require high maintenance to protect the network from malicious attacks.

The network administrator controls access to data and software on the network. A network administrator provides the user ID and password to the authorized person.

Aspects of Computer Network Security

Computer Network Security


Confidentiality means both the sender and receiver expect privacy. The transmitted message should only be sent to the intended receiver while the message should be opaque to other users. Only the sender and receiver need to be able to understand the transmitted message because eavesdroppers can intercept the message. Therefore, the message needs to be encrypted so that the message is not interrupted. This aspect of privacy is commonly used to obtain secure communication.

Integrity of the message

Data integrity means that the data must arrive at the receiver exactly as it was sent. There should be no change in data content maliciously in transmission or during an accident. As more and more monetary exchanges occur on the Internet, data integrity is more important. Data integrity must be protected for secure communication.

End-point authentication

Authentication means that the recipient is sure of the sender’s identity, that is, no importer has sent the message.


Non-repudiation means that the receiver must be able to prove that the received message came from a specific sender. The sender should not refuse to send a message that he or she sends. The burden of proving identity falls on the receiver. For example, if a customer sends a request to transfer money from one account to another, the bank must have proof that the customer has requested for the transaction.

Types of Computer network security


Firewalls put a barrier between your trusted internal network and external networks such as the Internet. They use a set of defined rules to allow or block traffic. A firewall can be hardware, software, or both. Cisco provides integrated threat management (UTM) devices and threat-focused next-generation firewall

Hardware and software firewall

Hardware firewalls are standalone products. They are also found in broadband routers. Most hardware firewalls provide a minimum of four network ports to connect to other computers. Business networking firewall solutions are available for large networks – eg, for business purposes.

Software firewalls are installed on your computer. A software firewall protects your computer from Internet threats.


“Malicious software” includes “malware”, viruses, worms, Trojans, ransomware, and spyware. Sometimes malware will infect a network but remain inactive for days or weeks. The best anti-malware programs not only scan for malware upon entry, but also continuously track files later to find anomalies, remove malware, and fix the damage.

Email security

Email Gateway is the number one threat vector for security breaches. Attackers use personal information and social engineering tactics to create sophisticated phishing campaigns to trick the recipient and send them to sites serving malware. An email security application prevents incoming attacks and controls outbound messages to prevent the loss of sensitive data.

Network partition

Software-defined segmentation puts network traffic into different classifications and makes it easier to implement security policies. Ideally, classifications are based on endpoint detection, not just IP addresses. You can grant access rights on the basis of the role, location, and more so that the right level of usage can be passed on to the right people and suspicious devices can be incorporated and redressed.

Access control

Not every user should have access to your network. To keep out potential attackers, you need to identify each user and each device. You can then implement your security policies. You can block non-qualified endpoint devices or give them only limited access. This process is network access control (NAC).

Application security

Any software you use to run your business needs to be protected, whether your IT staff builds it or you buy it. Unfortunately, any application may have holes or vulnerabilities that attackers can use to infiltrate your network. Application security covers the hardware, software, and processes you use to close those holes.

Data loss prevention

Organizations should ensure that their employees do not send sensitive information outside the network. Data loss prevention, or DLP, technologies can prevent people from uploading, forwarding, or even printing important information in an unsafe way.

Security Information and Event Management

CMG products pull the information they need to identify and respond to threats to their security staff. These products come in various forms, including physical and virtual devices and server software.

Intrusion prevention system

An Intrusion Prevention System (IPS) scans network traffic to actively block attacks. Cisco Next-Generation IPS (NGIPS) tools not only prevent malicious activity by correlating large amounts of intelligence to a global threat but also track the progress of suspicious files and malware on the network to prevent outbreaks and re-infections We do.

Mobile device security

Cybercriminals are increasingly targeting mobile devices and apps. Within the next 3 years, 90 percent of IT organizations can support corporate applications on private mobile devices. Of course, you need to control which devices can access your network. You will also need to configure their connections to keep network traffic private.


A virtual private network encrypts connections from one network to an endpoint, often over the Internet. Typically, a remote-access VPN uses an IPsec or secure socket layer to authenticate communication between the device and the network.

Web Protection

A web security solution will control your employees’ web usage, block web-based threats, and deny access to malicious websites. This will protect your web gateway on-site or in the cloud. “Web security” also refers to the steps that you take to protect your website.

Wireless security

Wireless networks are not as secure as wired ones. Without stringent security measures, setting up a wireless LAN can be like installing Ethernet ports everywhere, including parking lots. To prevent any exploits from happening, you need products specifically designed to protect wireless networks.

Protect your business

It is not difficult or expensive to follow security rules and acquire digital assets. Know and control your network with easy NAC, simple and affordable network access control solution.

Choosing a network access control solution has become a strategic imperative for organizations – particularly those playing the role of NACS in a zero trust security architecture. Modern NAC agent authentication tools have evolved beyond simple authentication to include visibility, sophisticated currency and compliance evaluation, as well as flexible control options for managed endpoints and unmanaged IoT devices.

Easy NAC’s unique technology does not require network configuration changes or agents. Easily add one site or up to a thousand network access controls.

Easy NAC automatically detects controls and controls device access with extensive software and cloud orchestration modules.

How to Secure Your Computer From Hackers

Computer and network security breaches are in the news every day, and they cost organizations that hunt millions of dollars. In fact, IBM reports that the average cost per event rose again in 2019, to $ 8.1 million for US companies, more than double the global average. The healthcare industry remains the weakest and experiences the highest average loss.

The facts surrounding cybersecurity can be downright scary, and protecting your system is important. Nevertheless, it can be a challenge for small and medium-sized organizations that do not have full-time IT staff to oversee system maintenance.

It is hard to know how to protect your network. Fortunately, there are many network security best practices that business owners can implement today to secure their data and build more impenetrable protection against hackers and viruses.

Use Antivirus

Any machine connected to the Internet is inherently vulnerable to viruses and other threats, including malware, ransomware, and Trojan attacks. Antivirus software is not a completely foolproof option, but it can certainly help. There are free options out there, but they are limited, and moreover, paid programs have not completely set you back. NetProtect is a popular option that I suggest. Take a look at this data-backed Bitdefender Antivirus Plus for an option, Norton Antivirus Plus.

Use Firewall

Two major computer operating systems have built-in firewalls, software designed to create a barrier between your information and the outside world. Firewalls prevent unauthorized access to your business network and alert you to any intrusion attempts.

The first thing to do with a new computer (or the computer you use now) is to make sure the firewall is enabled before going online. However, you can also purchase hardware firewalls from companies such as Cisco, Sophos, or Fortinet depending on your broadband router, which also has a built-in firewall that protects your network. If you have a large business, you can purchase an additional business networking firewall.

Use a VPN

Virtual private networks (VPN) are a great way to increase your security, especially when browsing online. When using a VPN, all your Internet traffic is encrypted and tunneled through an intermediary server at a different location. This masks your IP, replacing it with a different one so that your ISP can no longer monitor your activity.

When it comes to choosing a provider, there are some fine free offerings out there, but monthly rates for paid services can be very low, even as low as $ 3 per month. The free ones are usually limited in features, but for what is available it can be good to get experience. Some paid options have a free trial period for full service and most offer a generous money-back guarantee period.

Use an anti-spyware package.

Spyware is a specific type of malware designed to covertly infect a computer. It then sits in the system, gathers information, and sends it to third parties. The information is typical of a sensitive nature, such as credential or banking information. This could eventually become identity theft, a multi-billion dollar industry.

Some spyware records each keystroke to gain access to passwords and other financial information. Anti-spyware specifically focuses on this part of the nuisance spectrum but is often included in major antivirus packages such as Webroot, McAfee, and Norton.

Use a complex password.

Using a secure password is the most important way to prevent illegal intrusion on your computer network. The more secure your passwords are, the more difficult it will be to attack your system.

Being more secure often means longer and more complex: use a password that contains at least eight characters and a combination of numbers, upper and lower letters, and computer symbols. Hackers have the tools to crack short, easy passwords in a few minutes.

Other forms of verification include biometric methods such as fingerprints or retinal scans. Alternative physical verification methods may include key cards and fobs, such as those offered by Yubico. Any of these can be combined with each other and/or a password as part of a two-step authentication (2FA) process.

Update Your System and Software

Always install new updates in your operating system. Most updates include security fixes that prevent hackers from accessing and exploiting your data.

The same goes for your favorite apps. Today’s web browsers are increasingly sophisticated, especially in privacy and security. Be sure to review your browser security settings in addition to installing all-new updates.

Back Up Your Computer.

If your business is not already supporting your hard drive, then you need to go back to B-school. If you sabotage your system, it is important to back up your information.

Always make sure that you can rebuild as soon as possible after any data breach or loss. Built-in backup utilities in Mac (Time Machine) and Windows (File History) are good places to start. Purchasing external backup hard drives from places like Western Digital, Seagate and CalDigit assure that there is enough space for these utilities to function properly.

Use encryption.

Even if someone is able to steal your data or monitor your Internet connection, encryption can prevent hackers from accessing any of that information. You can encrypt your Windows or macOS hard drive with BitLocker or FileVault, encrypt any USB flash drive that contains sensitive information, and use a VPN to encrypt your web traffic. The only shop on encrypted websites – you can quickly spot them by “https” in the address bar with a closed padlock icon.



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