![]() Ideally, the cache provides the responses, which results in a significant reduction of network traffic. If you operate a local DNS filter, the local DNS server serves the queries. Assuming a corporate network uses the Internet provider's DNS servers, the DNS queries have to be sent to these servers, and the network clients have to wait for a response. ![]() The reason for the performance gain is the local cache that NxFilter uses and manages for DNS lookups. The news gets better: Experience reports indicate that the use of NxFilter has a positive effect on the Internet connection of all the network clients. Because the DNS protocol is used, the data traffic does not have to pass through a special filter – thus eliminating latency problems. In essence, NxFilter is a forwarding DNS server with a filter function. NxFilter is a freeware DNS filter that can compete with commercial products in terms of functionality and performance. This limitation can be solved with the help of a DNS filter, which can monitor all the traffic, regardless of the protocol used to send or receive data. However, latency is not the only problem: Proxy servers primarily specialize in filtering HTTP connections. These latency problems grow with the number of users. The use of such filters, often employing the Squid proxy server and similar tools, leads in practice to serious latency problems on the network because the proxy server analyzes and filters the web traffic and thus becomes a bottleneck. ![]() Overall, a reliable DNS filtering toolĬonsidering all of the above, NxFilter proves to be a reliable DNS filtering application that enables you to monitor and restrict permissions for all Internet activity, as well as to detect and block malware or botnet activity by analyzing the DNS packet.Web filters that are based on the HTTP proxy server principle are part of the standard toolkit for protecting corporate networks. Furthermore, it is possible to manage policy information, create a whitelist by domain, check out a list with known phishing websites, edit request details, as well as generate and study daily reports. You can get notifications about the user who tried to access blocked webpages, as well as create a list with as many users are necessary to associate them to IP addresses. It displays two graphs with the traffic and block trend, giving you the possibility to block remote hosts based on IP addresses, LDAP or password authentication method, in order to prevent suspected malware attacks, for example. Web interface with restricted sitesįrom this point on, NxFilter can be accessed from any web browser by visiting its dashboard in the local host. By downloading the additional libraries (specified on the website) and configuring the installed services afterward, you can finally get the DNS server up and running. However, you should keep in mind that NxFilter features a console interface for updating the required folders, which means that you have to be familiarized with switches. Since the program is actually a forwarding DNS server, you can apply the exact method of setting up a DNS server for user systems. Get the DNS server up and runningīy accessing the "Network and Sharing Center panel", you can choose the TCP / IP protocol to configure for using a specific DNS server address. Although it may seem easy to handle, the tool actually requires some experience with networking tools, since it's mostly designed for administrators and other IT specialists. NxFilter is a comprehensive software application for monitoring and examining the HTTP traffic in your network, as well as for restricting access to websites.
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