Web site security manager
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Website Security Concerns - An Overview
It is unfortunate, but there are many ways in which web site security can be jeopardized. For example, security risks are ever present which affect Web servers and LANs (local area networks) on which Web sites reside, even by the conventional use of a Web browser.
Web Masters bear the brunt when dealing with the major threats. As soon as a Web server is installed at a site, a porthole is constructed in the local area network through which anyone who's on the Internet can look. Obviously, nearly all web site visitors look at no more than what they are supposed to see, but just a few of them make an effort to locate elements of the site that aren't intended to be evident to the rest of the world. Fraudulent visitors would like to go further than simply look; they try to unbolt the window and steal in. The harm they may inflict might be mere vandalism, for example substituting the web site's home page with theirs which might say or put on view absolutely anything at all, or else it could be theft, such as appropriating a customers or sales database.
It's difficult to escape the virtual certainty that intricate software includes bugs. Regardless of how comprehensively it's tested, there does exist usually a certain permutation of events or user actions, although it might come about hardly ever, that creates a failure. Computer software bugs give rise to gaps in system security. A Web server is involved software that can very easily include a security defect.
It's not merely the intricacy of a Web server which can cause a glitch, but also its open architecture. Think about a CGI script as a case in point. A CGI script may be run at the server in response to a remote call from a client. This could be a request from a program or even the click of a button in a browser. If the CGI script has a bug, there is a risk of a security breach.
Network Administrators also have to deal with problems from Web servers owing to the danger they pose to the security of the local area network. Whereas there must be no unauthorized intrusions, admission must be granted to website visitors. This means that access to the network has to be regulated. The Administrator therefore needs to perform a delicate balancing act. Even the most sturdy firewall may be undermined if the Web server is configured badly. By the same token, normal use of the web site may be not viable if the firewall is configured poorly. Finding a perfect answer is yet more difficult if an intranet exists as a constituent of the system. Typically, the Web server then must be configured to recognise and authenticate domains and user groups, which are liable to have differing permission levels and access rights.
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The majority of people using a browser to surf the Net think that they really are doing so namelessly and securely. This is not the case. Web browsers are able to execute self-contained software programs on the local machine that are resident on a web site. Modern browsers show a notice and request authorisation to execute those programs. Known generally as "active content", e.g., ActiveX controls or Java applets, these programs, if malicious, might easily leave a virus or other dangerous software on the browser user's PC. Once it is in the system it can cause all kinds of damage and may be exceedingly tricky to remove.
This is also a worry for Network Administrators. Web browsers provide a path for possibly malicious software to seep through the local area network's firewall. After it is in the network, the harm it may cause can range from covertly appropriating private data to gratuitous demolition.
Besides the problems regarding active content, merely surfing the Internet records a trail of the user's activities in the browser's history. This can be used by web sites and installed programs to establish an exact profile of the user's behaviour and interests. Whereas this may be thought of as an invasion of privacy by some, it can be beneficial by providing related content instantaneously, so exonerating the user of the task of looking for it.
Confidentiality is a subject which concerns not only browser users but also Web Masters and Network Administrators for the duration of the actual transmission of data via the Net. TCP/IP (Transmission Control Protocol/Internet Protocol) is the fundamental language of communication for the Net. When it was formed, security was not the principal factor of its blueprint. Both network and Internet transmissions should therefore not be thought of as as automatically private. Every time the browser on a local PC downloads a private document from the remote Web server, or the browser user fills out a form with private information and clicks the 'Submit' button, the transmitted data could be intercepted without consent.
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