Installing a DNS firewall is an important way to protect the data on your DNS servers from hackers. Suffering from a hack attack could cost your business a considerable amount of time, energy and resources. Consider these four methods of installing a DNS firewall to better protect your business’ bottom line.
Using a DNS Forwarder
Your DNS firewall setup should include a DNS forwarder. This type of a system enables a DNS server to perform queries on behalf of another server. Your company’s data can be on one server and the other server can do all of the querying. The query results can then be forwarded to the server holding your data. The forwarder prevents the data server from interacting with the internet servers. In this way, it functions as a sort of middleman. This added layer of protection protects your internal domain DNS resources from hackers.
Setting Up a Caching Server
A DNS server that only conduct caching is not authoritative for any of your DNS domains. It is only configured to use a forwarder. When this server receives a response, it captures the result and sends it to the system that issued the query. As it performs these tasks, it amasses a large cache. This delivers a considerable improvement in DNS response times. It can also give your security as a boost when it works along with a DNS forwarder. You will not have to depend on the security implemented by your internet service provider. Using your own firewall and forwarding setup allows you a greater level of control. Please visit the www.bluecatnetworks.com website for more information.
Employing a DNS Advertiser
Another important part of your DNS firewall is the DNS advertiser. This unit resolves inquiries for domains for which it is authoritative. If you host publicly available websites such as yourcompany.com and yourbusiness.com, your public server can be configured with domain setups. This style of server setup protects your data server because it only has to answer the queries for domains that it is in charge of. It prevents unauthorized users from accessing your public server to handle other domains. It also safeguards against cache poisoning and domain hacking.
Implementing Server Configurations
The configuration of your server is just as important as the separate units that operate the query and firewall system. Be sure to set up your DNS firewall in a way that prevents cache pollution. This may require that you make manual configuration updates through the properties dialogue box. Cache pollution is a problem because if the cache fills up with bogus entries, your employees could end up clicking on or visiting malicious websites that install spyware, malware or viruses onto your company’s servers.