Table of Contents
Click an item to jump directly to that question.
- How Can I Block the QUIC Protocol?
- What is the difference between Web Filter & Web Filter Lite?
- Why Block Both MIME Type And File Types In Web Filter?
- How Can I Block All Web Sites Except Certain Ones?
- Why Is A Site Not Properly Displayed After Entering It Into Pass Sites?
- How Long Does Web Filter Cache Category Information For Sites?
- How Do Web Filter Real-Time Updates Work?
- Can I Use Both Web Filter And Web Filter Lite At The Same Time?
- How Can I Submit A Mis-Categorized Or Uncategorized Site?
- How Should I Handle Web Filter False Positives?
Web Filter is better than Web Filter Lite in many ways:
- Many More categories
- Larger database
- Dynamic categorization of new sites
- Safe Search enforcement
- Ability to check what category a website falls into and suggest a new category if desired
In an ideal world, both pieces of information would always be present for every web request. However, some sites use incorrect content types or extensions. The behavior of operating systems (Windows vs. Mac) is also different when given only file extension or content type. To be safe, both lists should be used.
In Web Filter, simply block all categories (including "Uncategorized"). Then add whatever sites you'd like to pass to the Pass List. Please be aware that the complex nature of the web and the fact that many applications communicate over HTTP can make this approach difficult.
It's common for a web site to display links, banners and content from other web sites as part of their web pages. There are two easy methods to re-integrate the content while maintaining your access controls. A good example is Facebook - when you go to 'facebook.com', much of the site is loaded from 'fbcdn.net', which also must be put on the pass list for it to display properly. To fix these problems, just look in the Event Log for domains that are still being blocked when you load the site. If nothing is showing as blocked in the Web Filter logs you will want to check other applications, like Application Control, to see if you have the site / service in question blocked there.
Several days. Web Filter flushes non-frequently used cache. Any website that you visit daily will not be cleared from cache.
When a client first vists a site, Web Filter accesses the zveloDB to get the categories the site is under to make a decision to block or pass based on your configuration. The category information is also written to a local cache so it doesn't have to be checked the next time a user visits that site.
We do not allow running both Web Filter and Web Filter Lite at the same time - if you have access to the trial or full version of Web Filter, we recommend using it rather than Web Filter Lite. We actually hide the Lite option in the Web UI when Web Filter is installed.
If you are running the paid Web Filter you can do this from the application itself. Simply click on the 'Settings' button on the front panel of the Web Filter application and then select the 'Block Categories' tab from the top of the screen. Now simply click the 'Site Lookup' button found at the bottom of this page.
You can also manually check a sites category and suggest a new one on our vendor's website - Zvelo - if so desired.
The fastest way to allow clients to access to a website that is currently blocked is to add the site to your pass list. Then see section 9 for how to recategorize a website.