Active Wall Free Edition is a professional and free network filtering software. The main features are url filter, mime filter, category filter, web content filter, post keyword filter, upload file filter, traffic monitor. It provides continuous enterprise-wide protection against the full range of Internet threats, from viruses and phishing attacks to inappropriate use of system resources to regulatory non-compliance.
Active Wall Free Edition includes the following plugins: Show Flux,HTTP Filter. free 10 License.

Active Wall Features:
1. User authentication: Only the correct account and password can enable the user to access the Internet. supports various authentication ways.
2. Time filtering: sets different time sections for different groups to access Internet in different time period.
3. Port filtering: Enable or disable ports will control the users to access Internet services. can impactfully block the online games, chat, video or audio services which do not match the office work by port filtering.
4. Bandwidth control: can control the flow rate of a user or a group, and set the maximum bytes which a user or a group can use in a day. This can save the band width resource and prevent some users from using high bandwidth consume applications, such as P2P tools.
5. Real-time flow rate statistics: can demonstrate the current statistics of flow rate in various protocols, which network blocks or protocols usages.
6. MAC filtering: All the computers in LAN can be bind with MAC and IP address. can prevent the IP address illegal usages by using MAC filtering.
7. IP filtering: By setting up a blacklist, can help the administrators filter and block defined IP addresses from the outside. Therefore, the users in LAN will not be able to visit the sites or hosts in the IP blacklist.
8. DNS filtering: can filter the DNS requests from the users in LAN, in order to block the DNS names used for pornography, gambling, games, etc.
9. HTTP filtering: By setting up a series of rules about URL, web content, post keyword or upload file, can filter the web surfing from all users in LAN. Meanwhile, it can log all webs the user has visited, in case that the administrator can check them in some other day.
10. SMTP filtering: can filter all the users emails sent by the rules of subject, mail body, from address, to address, attachment and mail size. Meanwhile it can log the emails in order to provide the business data loss or betray with evidence.
11. POP3 filtering: can filter all the users emails received by the rules of subject, mail body, from address, to address, attachment and mail size. Meanwhile it can log the emails in order to provide the business data loss or betray with evidence.
12. IM filtering: can monitor all kinds of Instant Messenger applications, Internet chat tools and P2P tools.
13. FTP filtering: can filter the file upload or download through FTP protocols and logs the files transferred.
14. HTTPS filtering: can filter the https protocol by IP address, server side certificate, SSL version and deny https tunnel.
15. Proxy redirect: can build up a transparent proxy service with general proxy servers. This can enable the gateway anti-virus or anti-spam emails.
16. Log output: can save the entire network monitoring statistics and the alarm information in defined folders.
17. e-mail alerts: By setting a keyword, can send email alerts informing users about various events.
18. Message alerts: By setting a keyword, can transmit some messages to the administrating computer when the key event happens.
19. Log database: can save the entire network monitoring statistics and the alarm information into a database, for the convenience of administration.

The license of this software is Freeware, you can free download and free use this firewall software.