Every invention parallels with a series of threats hanging on it’s safety. One of the most important systems in global network is DNS which is liable to be attacked every now and then due to it’s versatility. Attackers around the world are always putting an eagle’s eye to damage the network in order to get profit. Obviously, there are several server administrators who incessantly curtail the chances of DNS attacks. However, DNS system is so vulnerable that attacks are bound to suffer it. Let’s get to know about some of the most common attacks servers come across:
1. DNS Amplification:
Often DNS server looks for recursive answers to queries and thus pave way to the attackers to launch their attacks to other DNS servers with the help of recursive lookup. DNS provides better protection against DNS amplification than other services.
2. Denial Of Service:
Traffic is common in DNS network but without attacks, it manages to tackle the traffic easily. However, attackers don’t sit quietly and interfere here too. They put a lot of traffic through detrimental bots to any targeted IP address. Hence, legitimate queries remain unresolved.
3. Cache Poisoning:
This attack is very common as it involves interference in the cache of the local DNS server. Attackers here try to replace an IP address with that of a miscreant address in order to gather information or to execute another attack.
4. Basic NXDOMAIN Attack:
Here attackers deluge the DNS server with non existing domain name in order to slow down the server. In addition to this, the cache in local server is also filled with NXDOMAIN results.
5. Phantom Domain Attack:
Server spends resources to satisfy the queries. These resources are used up uselessly by the attackers as they setup Phantom domains. Hence, it leads to failure of performance and slows down the servers as well.
6. Domain Lock-up Attack:
This is also intended to exhaust the resources of DNS. Junk or random packets are sent to engage the servers whenever it tries to resolve a request.