Category: Security

Category: Security

Category : Security

It should come as no shock to business owners that DNS attacks are on the rise. This makes DNS protection more important than ever. While there are several types of DNS attacks out there, a few are more likely to inflate your network either because it’s hard to protect against them or they are easy to pull off. In either case, these are the DNS attacks for which you need to be on the lookout.

Distributed Reflection

The goal of a distributed reflection DNS attack is to cause a disruption in service to your customers. This kind of attack involves the attacker sending spoof queries to your server in high numbers. This eventually overloads the servers, which causes them to crash under the extreme traffic. Legit customers who try to visit your server will be greeted by a denial of service and unable to access your network. These types of attacks are often referred to as DDoS or a distributed denial of service.

DNS Tunneling

This is a type of DNS attack through which hackers use your DNS as a communication channel that bypasses the firewall in your system. Using the DNS, attackers can easily pass along stolen data without you ever knowing. Sometimes they use this method to simply get free Wi-Fi service by bypassing security measures. This type of attack is bad because legit customers can have their information stolen from your network without you knowing about it until it’s too late. This breaks your consumers’ trust.

DNS Hijacking

Much like DNS tunneling, this type of attack is used to steal information from your server. Attackers typically use this method to take your consumers’ passwords, user names and credit card information. It involves the old bait-and-switch technique. The attacker uses your DNS records to point your visitors to a rogue DNS server. Your customers try to visit your website and are redirected to the bogus site without knowing it. There, they use their log-in information or credit cards to buy goods, and the attacker gains access to their information.

NXDOMAIN Attacks

Another type of DNS attack involves overloading a server with fake information. With this kind of attack, the hacker sends a flood of requests to your servers from non-existent domains. Your server continues to work hard to locate these domains but is unable to find them. This results fills up the cache for the server with NXDOMAIN results. The end result is a slow server that times out legit users.

Protecting your network from DNS attacks is important. Unfortunately, not all companies consider DNS protection until it’s too late. Protecting yourself from these types of attacks is something that needs to be done on a regular basis to prevent a major data breach. Visit BlueCat for additional resources.