DNS Spoofing (also known as DNS Cache Poisoning) is the unauthorised modification of DNS server records to substitute a website address with a different address. DNS Spoofing is a sort of computer attack in which a user is compelled to travel to a false website that appears to be legitimate in order to divert traffic or steal passwords.
All DNS requests, and hence all traffic, might be redirected to an attacker’s machine, where it could be manipulated maliciously and data stolen. The attacker can use this traffic redirection to transmit malware, steal data, and so forth.
When a web user requests the affected page, the request is diverted to a different address, where the user’s machine might be infected with a worm, spyware, web browser hijacking application, or other malware.
But When the system asks the DNS server for the IP address of a particular website, the DNS server responds with the website’s real IP address. DNS spoofing is another type of man-in-the-middle attack that forces victims to visit a bogus website that appears to be legitimate.
DNS cache poisoning code is frequently seen in URLs delivered via spam emails. These emails are designed to scare people into visiting the provided URL, which then infects their PC.
The attacker uses DNS software weaknesses to carry out a cache poisoning attack.
DNS spoofing may be quite inconvenient for both website visitors and website owners. The major motivation for an attacker to carry out a DNS spoofing assault is either personal gain or the dissemination of malware.
Prevention Of DNS spoofing
- Internal systems must be kept secure and updated with the newest security updates from various suppliers.
- Keep your DNS software up to date.
- Along with IPsec, SSL is an excellent protection.
- DNSSEC: DNSSEC is a highly secure technique that allows DNS servers to only publish digitally signed DNS records.
- Allow zone transfers and updates from trusted sources.
- Use Virtual Private Networks (VPNs) to secure sensitive data using an encryption technology like SSH or IPsec.