SharePoint Server 2010 and 2013 have somewhat different licensing rules for Internet-facing sites. Listed below are the licensing requirements for Internet-facing sites under both versions of SharePoint.

Both SharePoint 2010 and 2013 licensing models employ two types of Client Access License (CALs): a Standard CAL and an Enterprise CAL. For SharePoint Server 2010 there were two relevant categories of server-side licenses, a general purpose SharePoint 2010 server license (US$4,926) and a special purpose SharePoint Server for Internet Sites (FIS) server licenses, which came in two editions, Standard (US$11,793) and Enterprise (US$41,392), with the former allowing SharePoint Standard CAL-level capabilities only and the latter enabling both Standard and Enterprise CAL-level capabilities. SharePoint Server 2013 does away with FIS and has just one server-side license (US$6,798). (Prices listed are Open NL suggested reseller prices and represent the highest price a U.S. customer would pay when purchasing through volume licensing.)

Licenses required differ for internal users (employees and on-site contractors) and external users (everyone else). They also depend on the type of content the site hosts, in particular, whether the content qualifies as "publicly available" ("publicly available site"), or whether content is restricted to a subset of the general public, such as partners and suppliers ("extranet site"), or to internal (employee) users only ("intranet site"). If an Internet-facing SharePoint site hosts more than one type of content, the site must meet the licensing requirements of each type. In the case of SharePoint Server 2010, this could mean that all server instances require two different kinds of SharePoint server licenses. For example, a SharePoint Server 2010 site that qualifies both as an extranet site and an intranet site could need both FIS licenses to cover external users and SharePoint Server 2010 server licenses and CALs to cover internal users.

External Users Internal Users
SharePoint 2010
Publicly available site SharePoint 2010 for Internet Sites (FIS) license for each server or SharePoint 2010 server license for each server plus SharePoint 2010 CAL(s) for each user or device
Extranet site
Intranet site Not applicable SharePoint 2010 server license for each server plus SharePoint 2010 CAL(s) for each internal user or device
SharePoint 2013
Publicly available site SharePoint 2013 server license for each server (no CALs needed) SharePoint 2013 server license for each server (no CALs needed)
Extranet site SharePoint 2013 server license for each server plus SharePoint 2013 CAL(s) for each internal user or device
Intranet site Not applicable