How to prevent DNS cache poisoning and spoofing
The protection of end-users is limited when we are looking to prevent DNS spoofing. In order to protect their users and themselves, the DNS server providers and website owners are a bit more empowered. If we want to keep everyone safe, spoof must be avoided by both parties.
The prevention measures for server providers and website owners are as follows:
- Tools for DNS spoofing detection
- End to end encryption
- Domain name system security extension
The prevention measures for endpoint users are as follows:
- We should never click on an unrecognized link.
- We should daily scan our system for viruses or malware.
- We should solve poisoning by flushing our DNS cache.
- We should use VPN (Virtual private network)
Prevention tips for Website Owners and DNS server
The security of website users is in the hands of the DNS server provider and owner of the website. If we want to keep the threat out, there are various protocols and protective tools. Out of the various resources, we should use some of the following:
DNS spoofing detection tools: This tool is related to the endpoint user security products. If we want to send the data, these tools help to scan all the data which we want to send before sending it out.
DNSSEC (Domain name system security extensions): It is a type of protocol used to add additional methods of verification to secure our DNS. Using the DNSSEC, the DNS messages can be authenticated. A unique cryptographic signature is created by this DNSSEC protocol, which is stored alongside our other DNS records. Then the DNS resolver uses this signature to authenticate a DNS response. The DSN lookup keeps spoof-free and authentic with the help of the DNSSEC system.
End to End encryption: In this, the DNS request is sent for the data in an encrypted way and keeps attackers out because it is impossible for them to duplicate the website’s unique security certificate.
Prevention tips for endpoint users
In the DNS poisoning attack, end-users are particularly vulnerable. There are the following tips to avoid DNS poisoning attack by the victim.
Never click on an unrecognized link: Sometimes, users click on a link which they don’t recognize. The lick can be on any text message, social media, emails, etc. We should avoid this as much as we can because the link destinations can be further masked by tools that can shorten URLs. If we want to be safe in the address bar, we should always enter a URL manually. After doing this manually, we have confirmed that the website we enter in the URL is official and legitimate.
Daily scan our system for malware: While the DNS cache poisoning cannot be detected by us but, to remove and uncover any secondary infections, our security software will help. Any type of malicious program is delivered by spoofed sites, so our system always needs to scan for spyware, Trojan horse, virus, and other types of hidden issues. The inverse of this means the spoofs can be delivered by malware is also possible. Web-based results can also be spoofed by poisoning, so rather than the hosted versions, we should always use local programs.
Flush our DND cache: The system can contain cache poisoning for a long time, so to avoid this, we should out the injected data. Just like we open the window, run programs, and type “ipconfig /flushdns”, this process is also simple. The flush options are also available on Android, iOS, and MAC. These are usually found in the URL of a specific native web browser or in the option of “network setting reset”, toggling airplane mode by rebooting the device. For more guidance, we can see our specific device method.
Use VPN (Virtual private network): All the web traffic provides an encrypted tunnel using these services. It also provides end to end encrypted security that is used by a private DNS server. As a result, it gives us the requests that can’t be interrupted and the servers that are very much stronger against DNS spoofing.
The malware attack and DNS spoofing are harmful to us, so we should leave ourselves vulnerable. We can protect ourselves with Kaspersky Security Cloud, and it is available for Mac iOS and Windows PC both.