It also acts as the repository of Web pages, which can be viewed using a Web browser. It is used for sharing printers and files. A Singapore designed and manufactured appliance server is Celestix's Aries. The company's Marketing Manager Tan Hung Kwang claims it is the smallest in the world at a mere 172 mm in height and 950g in weight. Yet, besides being a Web and file server, it can act as a VPN gateway and supports wireless networking.
Security concerns A common concern about networks and servers is security.
In turn, the most common security feature is a firewall which is a program that filters all network traffic to prevent unauthorised communications and system compromise. A more sophisticated firewall would comprise a system or combination of systems to enforce a boundary between two or more networks, or a gateway that allows only approved access between networks. HP, for example, has a software called WebEnforcer, which fortifies the Web server platform by automatically discovering and fixing existing vulnerabilities and insecure settings. Besides providing intrusion prevention in this way, it continuously monitors and enforces secure settings to protect against new vulnerabilities. Pte Ltd. 2001.