Posts Tagged Network Security Threats

Types And Sources Of Computer Network Security Threats

November 28, 2014

With advancement in technology, Computer networks have made changed the way we used to work. However there are a number of threats that can breach the security of the system and allow illegal access to important information that can be used for malicious purposes. Some of the possible attacks are:

Denial Of Service (DoS) Attacks

These are probably one of the vilest attacks that are extremely difficult to resolve. A denial of service attack is a malevolent effort to make a network resource or a server inaccessible by the users. This is usually done by temporarily suspending or interrupting the services of the host linked to the Internet. You should make sure that you employ packet filtering in order to restrict the entry of forged traffic to your network space. You must also keep yourself updated about the recent patches available to ensure your security from malicious attacks.

Illicit Execution of Commands

This threat involves an unidentified person executing various commands from your server. Depending upon its severity, this threat can be categorized under normal user access (where the unidentified source is executing commands to only access data on systems) to administrator access (where unknown user makes or attempts to make system configuration changes).

Unauthorized Access

This is a comprehensive term used to denote a number of network security threats. The purpose of these attacks is to access the information from a computer or network source that your device is programmed not to provide to the attacker. You should make sure that you set up an alert to be informed whenever someone is trying to make an unauthorized access. Many systems are also programmed to lock an account after a set number of unsuccessful login attempts.

Confidentiality Breaches

This involves gaining access of confidential and private data by the hackers. This may include trade secrets, credit card numbers, financial statements, secret formulas, patents etc. Such information, if slipped into the hands of a malicious user, can severely harm you on a personal or professional level.

Destructive Behavior

Destructive attacks may be categorized as:

  • Data Destruction: This involves deleting or destroying the data stored on your network or hard disk drive so that it becomes completely unreadable and unusable for you.
  • Data Diddling: It occurs when a hacker modifies the important information before or at the time of entering it into the device.  These may include counterfeiting or forging documents, changing details of online financial transactions etc.

These network security attacks can come up either from physical access, Internet or dial-up modems. You should make sure that you follow all the important steps to protect yourself from such vulnerabilities.


No Comments

Top 10 Network Security Threats

November 24, 2014

There are a number of security systems available that can help you protect your computer network from unauthorized access. However, there are a number of internal vulnerabilities, which are not commonly considered to be a threat, but have the potential to seriously infect your system.

Some of the common network security threats are:

  1. USB Drives: These are one of the most common means of infecting a network. USB drives are small, inexpensive devices that can be used to share data between computers. Once a system is connected with a USB drive, most operating systems allow automatic running of programs, even the malicious ones.
  2. Laptops and Netbooks: Laptops and Netbooks of people outside the company, if connected to company’s computer network can also transmit codes that can hamper the security of a network. These portable devices may also have many system codes running at the back end to search for and infect internal networks. These malicious programs can also provide an easy access to a company’s important information like salaries, phone numbers, addresses, medical records, employee passwords etc.
  3. Wireless Access Points: These provide immediate access to the network to any user within the network range. With security vulnerability in wireless access points, hackers can penetrate a computer system to get hold of confidential information. Most of the wireless AP protocols such as WPA and WPA2 are susceptible to attacks if strong passwords are not used.
  4. Miscellaneous USB Devices: Apart from USB drives, many other devices such as digital cameras, MP3 players, scanners, printers, fax machines etc. also pose a threat to the security of a network by transferring infected files from one system to another.
  5. Employees Borrowing Others’ Machines or Devices: Borrowing or sharing devices within the office can also cause an employee to inadvertently access restricted areas of the network. Thus, it is important that the passwords are strong and frequently changed.
  6. The Trojan Human: These are attackers who enter the websites in the camouflage of an employee or a contractor. These types of swindlers are capable of gaining access to the secure area of the network, including the server room.
  7. Optical Media: Just like the USB devices, optical media such as CDs or DVDs can also be used as a source of network infection. Once installed and run on a system, these portable storage devices can steal and disclose confidential data to other public networks.
  8. Lack of Employee Alertness: Besides the intimidations from digital technology, the capacity of human mind to store information also poses a major threat to a network’s security. Employees should be alert to note who is around them when they log on to their system or while reading confidential documents in public places.
  9. Smartphones: Today, phones are no less than mini-computers having the capacity to perform complex tasks. Hence, smartphones also pose the same security threat as a laptop, netbook or US devices.
  10. E-mail: Emails are commonly used to communicate, send and receive files within the business networks. However, this facility can often be misused for malicious purposes. Confidential messages can certainly be sent to any outside target and many viruses can be transferred through emails.

Make sure you keep a note of all these potential threats and take the necessary steps to prevent your internal network from getting infected.


No Comments