Technologies in content filtering have turned out to be necessary to fight as well as censor specific materials on the internet. Content filtering is another efficient weapon inside your arsenal. It proactively hinders web sites which are known to contain harmful code, "fake" websites that capture sensitive information, and those that are not business-related or appropriate. Content filtering is an immediate and urgent require in society.

America passed the Children's Web Protection Act (CIPA) in December 2000, requiring schools and libraries to run content filtering to protect kids. Filtering rules are usually set by a central IT department and may be implemented via software on individual computers or at a central point on the network like the proxy server or web router . Depending on the sophistication of the system used, it might be possible for various computer users to have various levels of web access. Content filtering is the most commonly used group of methods to filter spam . Content filters act either on the content, the info contained within the mail body, or on the mail headers (like "Subject:") to either classify, accept or reject a message.

Some software programs are more flexible than other people. To some extent, customization options ought to match your technical comfort level. If you are fairly new to using computers, you may not feel daring enough to do much experimenting with the controls. On the other hand, a program that's highly customizable permits you to grow into it, also as to adapt it to your family's changing needs. Block Page Bypass works by empowering you to assign people permission that permits them to bypass blocks and access designated Web sites. This highly efficient and efficient technique of granting access on a per-user basis is superior to appliance-based services as it only performs a proxy function for blocked sites - improving performance while increasing security.

IP blocking. Access to a certain IP address is denied. If the target Web website is hosted in a shared hosting server , all websites on the same server will be blocked. This affects IP-based protocols like HTTP , FTP and POP . A typical circumvention technique is to discover proxies that have access to the target websites, but proxies may be jammed or blocked, and some Web sites, such as Wikipedia (when editing), also block proxies. Some big web sites like Google have allocated additional IP addresses to circumvent the block, but later the block was extended to cover the new IPs.