Port 80 is often called the highway into networks. Port 443 for secure sockets layer (SSL) is often referred to as the UFBP - universal firewall bypass port. Today, many legacy applications are either web-enabled or in the process of becoming web-enabled. Consequently, these applications - which were never designed to be used in this fashion - are now being exposed in new ways to larger and larger user communities, as well as attacking communities with increasing sophistication. In many cases, the process of web-enabling an application exposes critical assets, such as large databases with personal client information. Even some non-legacy applications that were designed from inception to run as web-enabled applications can contain significant security vulnerabilities.
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