/ Anycast Technology
All too often, people forget that websites can be knocked out by attacks on name servers, and not just web servers. Targeted DoS or DNS amplification attacks can overload name servers to such an extent that the domain name system simply grinds to a halt. All of the domains configured on this name server will then become unavailable. The answer to DoS attacks is Anycast DNS!
Anycast Technology
The classical addressing method in the Domain Name System is unicast; a DNS server has a dedicated IP address. Queries to this IP address all lead to this one server no matter where in the world the client is located. This may cause delays and timeouts for remote clients. Furthermore, if the server is down or a victim of a DoS attack, the whole service provided under this dedicated IP address is affected and not available anymore.
Fast, secure, reliable!
The classical addressing method in the Domain Name System is unicast; a DNS server has a dedicated IP address. Queries to this IP address all lead to this one server no matter where in the world the client is located.
This may cause delays and timeouts for remote clients. Furthermore, if the server is down or a victim of a DoS attack, the whole service provided under this dedicated IP address is affected and not available anymore.
RcodeZero DNS
But it’s not just individual domains – the entire .at zone has to be permanently available. And that’s where the nic.at name servers come into it. nic.at developed the highly-available, worldwide RcodeZero Anycast DNS name server network to assure the requisite availability. It works for .at and other Top-Level Domains and is available to registrars and end users via nic.at subsidiary, IPCom. More information can be found in the explanatory video an on at www.rcodezero.at.