Spoofing is an online attack where the cyber attackers change the address or the source of a packet with the intent to make it seem that it appears from a trusted source. To detect such false or spoofed packets, enterprises set up routers, firewalls, and gateways which are responsible for examining each incoming packet and verify the source. Anti spoofing is a technique that detects packets with false addresses. Quick identification of detecting these addresses help in stepping up security measures.
Anti spoofing is what Internet Service Providers or ISPs or network operators implement in the network. A system that can validate the source address is implemented in the infrastructure – it is done to stop spammed or spoofed packets with incorrect IP addresses to enter or leave the network.
So, what is anti-spoofing meaning? Earlier, it was a form of ingress filtering where the IP addresses of the incoming packets are checked at the edge of the network. However, it has been proved that ingress filtering needs to be deployed all across all networks for effectiveness. Otherwise, it is not effective at all.
That is why anti-spoofing is very important.
Anti-spoofing definition – It is a technique that focuses on blocking off packets that are identified or detected to have wrong, falsified, or spoofed source addresses. This is done by creating a firewall rule that gets assigned to the interface that connects the firewall with the system. The firewall rule determines each incoming packet, checks the source addresses of these packets that come in contact with the interface.
The objective is to prevent attackers from unduly taking advantage of the network using a spoofed IP address.
Source-Address Validation or SAV on the network; or Unicast Reverse-Path Forwarding that is used on cable-modem networks or uRPF that validates on router networks. Another way is to create packet-filters that permits packets with a legitimate IP address.
The anti-spoofing technique needs to be configured on the internal and external interface. The only exception to this should be for incoming traffic from a trusted network.
How to configure anti-spoofing in the checkpoint firewall?
There are two ways to do so – configuring the internal interface and the external interface.
Today we are frequently using GPS-enabled devices. Not only end-users, but industries such as construction, supply chain, and logistics, or survey also are dependent on GPS and GNSS technologies. Both the technologies, Global Positioning System and Global Navigation Satellite System are reliable technologies that form the backbone of many industrial operations. Outages in such a network can cost dearly. Hence, there’s a need to have spoof-proof techniques like
One of the key areas where biometric face recognition is coming into big-time use is that of anti-spoofing. The technology helps prevent face spoofing.
This technology is used widely by the Military and Civilian GPS Receivers. In this technology, the signals from satellites are masked. What happens is that the GPS receivers are unable to find the exact location or position due to this. This technology is primarily used by the military forces to work with an advantage when compared with other military forces.
Different techniques that are being researched and also being used in the real-time to detect spoofing of GPS satellites:
To summarize, anti-spoofing technologies and techniques help in the identification and prevention of spoofed packets. These are packets that have a false address and can be of malicious intent to damage your network, steal data, install malware, and so on. Many technologies are used and are being researched upon. Firewall vendors configure anti-spoofing technologies so that private addresses are blocked on the external interface; while the external interface is programmed to bock off addresses that are part of the internal network range.