Those features include local DNS cache to accelerate Internet speed, load-balancing and fail-safe with clustering, Active Directory integration support, user/group-based policy assignment, remote user filtering, bandwidth control, phishing protection, malware, and botnet detection, and time quota. You will also be able to protect your users from malware and botnets while enjoying many useful features. But if you can manage a PC network then you shouldn't have much trouble, and what you'll get for your efforts is one of the most capable and configurable free web filters around.NxFilter is a freeware web filter designed for monitoring and filtering Internet activity within an enterprise environment.

NxFilter is an enterprise-level web filter, and setting it up needs some network experience, and a little time. If the default site blocking isn't enough, NxFilter supports adding domains manually, or grabbing the blacklist from You get a stack of configuration options, there's even support for authenticating users via LDAP and Active Directory (as well as password and IP address), all while delivering great performance (the developer claims NxFilter can handle 'several thousands of users easily').

And you're even able to assign policies based on a time range, so for example an office might have a very loose policy at lunchtime, but something much more restrictive for the rest of the day. These policies can be applied to individual network users, or groups of users. If you need more control, it's possible to create NxFilter policies which block sites by category (75 in total), or only allow access to particular site categories - or all internet access - for a certain amount of time a day. A browser-based console displays stats on web traffic, blocked domains and more, as well as logging every site you've accessed. Get NxFilter running on one PC, though, and it brings benefits right away, blocking known phishing sites and using packet inspection to detect some malware. It's still not difficult - if you know how to configure your system to use a custom DNS server then you won't have much trouble - but you will have a little work to do. NxFilter isn't for network beginners, it won't fully set up everything itself, and even the web tutorial doesn't walk you through every detail. You'll first need to install and configure the program, of course, and that can take a little effort. It's also possible to limit access by user and time, and one NxFilter installation can protect your entire network. NxFilter is a powerful Java-based web filter which controls access to web sites based on their domain names. NxFilter is a freeware web filter designed for monitoring and filtering Internet activity within an enterprise environment.

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