Inside Internet Filtering

CyberPatrol today announced a new business-level filtering product called SiteSURV (Press Release).

The product uses a DNS poisoning technique to accomplish the filtering by checking DNS lookups against CyberPatrol’s site database.  While this type of filtering is easy to deploy by simply changing your DNS settings, it is also among the easiest to bypass (I won’t go into details on how).

They have two versions currently: the standard version and a self hosted version for larger organizations (SiteSURV Plus).  The plus version seems to have more customization capability than the standard version, such as choosing your categories, and creating your own list of allowed/blocked sites.  However, with the plus version you also will need to furnish your own windows based server to run the software on.