Adware is software that automatically displays unwanted ads in order to generate revenue for the adware's authors. These ads display as banner ads or as an ad displayed during an installation. There are security concerns with adware since it can track personal information and this information can be sold to a third party.
Infected Hosts contain URLs with detected Viruses and other known malicious software or content. This may cause increased false positives (see warning
This contains URLs that are known or suspected phishing sites - typically financial fraud or identity theft. Blocking this does not guarantee that ALL fraud or phishing sites will be blocked. Generally, phishing pages should be blocked.
Web Proxies are URLs that allow a user to mask their online identity in order to bypass filtering or monitoring methods to potentially gain unauthorized access. Sites that provide information on how to gain access to a URL in a way that bypasses the proxy server, as well as proxy server features and web-based URL translator sites that circumvent filtering will fall under this. Generally, Web Proxy pages should be blocked.
This contains known or suspected URLs associated with computer viruses. Selecting this as a category to block does NOT guarantee that all viruses sites will be blocked. Selecting this does NOT inspect email attachments or files copied or downloaded to the computer. You should take additional precautions to avoid viruses.