The CentraNow servers are kept in a locked, secure environment with restricted access. A strict privacy policy governs the management of user data that is kept on the CentraNow servers. Data Stream Security Content in CentraNow meetings is transmitted via a proprietary encoded format. This makes it difficult but not impossible for determined parties to intercept and decode the information transmitted. A firewall can be anything from a set of filtering rules set up on the router between you and the Internet to an elaborate application gateway consisting of one or more specially configured computers that control access.
Firewalls permit desired services coming from the outside, such as Internet email, to pass through.
In addition, most firewalls now allow access to the Web from inside protected networks. This allows some services to pass, but not others. The CentraNow service uses a sophisticated adaptive network connection manager. This manager attempts to connect to the CentraNow meeting server via the best possible means. In most cases, this connection is made directly to the meeting server via HTTP protocol over either port 1709 or 80.