DNS Cache poisoning: What every SMB must know
Protecting yourself against DNS poison attacks
Here are some ways to protect yourself and your customers from becoming victims of DNS poison attacks.
- As discussed before, one of the most common poisoning attacks is the DNS attacks. Cybercriminals try to corrupt your DNS server using theirs. You can prevent this by bringing a trained professional onboard for your DNS server set-up. An expert will know to set up your DNS server such that it has a minimum relationship with other, external DNS servers, thus limiting your attacker’s ability to corrupt your DNS server using theirs.
- As a best practice, ensure that your DNS servers only store data related to your domain and not any other information. It is harder to corrupt the system when it focuses on a single element.
- Another best practice is to ensure that you are up-to-date on all DNS security mechanisms and are using the most recent version of the DNS.
- Ensure your site has, in layman terms, an SSL certificate and make sure it is HTTPS. Using encryption, a site with HTTPS protocol allows for a more secure connection between its server and the internet and is better at keeping cybercriminals out. Having an SSL certificate also ensures your site’s name shows up alongside the URL in the address bar. This is an easy way for visitors to identify if they are on a genuine site or not, thus helping them steer clear of phishing attacks and clone sites.
Data poisoning is one of the lesser-known and hence less talked about forms of cybercrime. But, it can inflict great damage--perhaps even more damage than the other obvious threats such as viruses and ransomware, because, unlike a Denial of Service (DoS) attack or a Ransomware attack where you know the moment the malware has hit your system, in a data poisoning attack, the malware is incorrect data that slithers into your system quietly like a snake and changes its overall functioning before delivering the big blow.