What is IP spoofing and how to prevent it?

While we appreciate the speed and scope of this digital age, we cannot ignore the growing number of reported cybercrimes. The recent scam that took place on behalf of OCBC, Singapore’s second largest bank, where nearly 800 customers collectively lost S$13.7 millionis an audible alarm.

This reinforces the importance of understanding IP address spoofing and how to prevent it from happening.

Corn what is identity theft anyway?

Identity theft is a malicious act where cyber criminals attempt to deceive individuals and company employees. They usually impersonate the identity of a legitimate entity to access sensitive information such as bank account details.

Common types of spoofing attacks include:

  • IP address spoofing
  • Email spoofing
  • Domain spoofing
  • Website spoofing
  • Caller ID spoofing
  • Text spoofing
  • ARP spoofing
  • DNS spoofing
  • GPS spoofing
  • face impersonation

From all of the above, IP address spoofing is extremely common.

What is IP spoofing?

Read on to better understand what it is, how to detect it, and prevent it from happening.

What is IP spoofing?

With IP address spoofingthe attacker replaces the IP address with a spoofed IP address so that the receiving computer trusts and accepts its input. Recognize email spoofing at an early stage prevents you from being victimized.

How does IP address spoofing work?

before understanding IP address spoofing, you should know that the Internet sends and receives data through small packets that store source information. To identify these packets, you need the source and destination IP addresses.

A IP spoofer modify the original address with a fake ip address. In simpler terms, IP address spoofing is nothing more than a form of disguise.

This is most prevalent in denial of service attacks (DoS attacks), which is a form of cyberattack intended to shut down a machine or network so that users cannot access it.

Basically, in DoS, the IP spoofer overwhelms the receiving computer’s server with multiple data packets. This is done through botnets spread across different locations. It becomes difficult to trace the attack with hundreds and thousands of messages from various spoofed IP address addresses.

Another one IP address spoofing uses thousands of devices to send messages to multiple recipients (usually a large number) using the same IP address spoofing. Thus, the receiving system grants the permission and floods the targeted server.

The third IP address spoofing approach disrupts communication between two devices and tampers with data packets without notifying the original destination source.

Why is IP address spoofing dangerous?

IP address spoofing can jeopardize your company’s image and things can get worse if hackers target your customers by stealing their information from your database. It is extremely difficult to identify a spoofed IP address. Before your system knows it, the damage is done. Here are the three reasons that make it difficult to locate a IP address spoofing.

No sign

Usually we are aware of the signs of Phishingcorn IP address spoofing don’t wear any. Instead, it convinces the victim to believe the disguised address and seizes the sensitive information for misuse. It just redirects the communication and allows the hackers to carry out their malicious activities

It takes time to notice the attack

Usually, network security systems raise alarms on most types of cyberattacks. But unfortunately, IP address spoofing allows the IP spoofer to access computer systems and networks. It pretends to come from a legitimate source, evading the usual security measures. That’s why the IP address spoofing technique is widespread among pirates.

The system allows multiple impersonators to bypass the firewall

The tactic of IP address spoofing allow a computer to authorize hundreds and thousands of messages from the same fake ip address. This eventually floods the system, causing it to shut down completely.

How to detect IP address spoofing?

A IP spoofing is detected by examining the packet headers of data packets. A packet header is part of a spoofed IP address which contains the information needed to reach the destination. This is why they are analyzed to find all sorts of discrepancies.

The details of the intended destination are validated by its Media Access Control address (MAC address) or using other security systems such as Cisco’s IOS Netflow. It gives a specific identity and timestamp to each device on that network, which consequently helps in finding the IP spoofer.

How to prevent IP address spoofing?

Now you know what is ip address spoofing and how to detect it, let’s move on. It is difficult to detect IP address spoofingtherefore, it becomes even more crucial to know the preventive methods.

Packet filtering

This process basically analyzes the header of each packet to confirm if the IP address matches the source. The computer does not let the packet complete the route if there is a discrepancy.

Authentication of users and devices via PKI

Public Key Infrastructure (PKI) is an authentication method based on pairs of public and private keys. The private key encrypts the communication and the public key does the opposite.

Thus, the asymmetric key method is used, which means that the public and private keys are not identical. As such, IP spoofers are unable to determine the private key. This method has proven to be very effective in preventing the man in the middle IP address spoofing.

Network monitoring and firewall

Network monitoring helps locate any type of suspicious activity, while a network firewall is deployed for IP address authentication. This prevents the entry of a IP spoofing filtering suspicious traffic.

Router and switch configuration

Another effective way to prevent IP address spoofing involves configuring routers and switches to deny them access to packets from outside your local network. Generally, the IP address spoofing experts play with the address to make it appear as an internal address only.

IP address spoofing: access to DDoS attacks

Spoofed IP The addresses are like duplicate keys used by the hacker to enter your system to cause a distributed denial of service attack (DDoS attack). The hacker floods the targeted server or network, disrupting the entire system.

You can learn more about DDoS attacks and ways to prevent them from happening in our blog post on the subject.

What is IP spoofing and how to prevent it? appeared first on EasyDMARC.

*** This is a syndicated blog from EasyDMARC’s Security Bloggers Network written by Knarik Petrosyan. Read the original post at: https://easydmarc.com/blog/what-is-ip-spoofing-and-how-to-prevent-it/

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