Web site security lock
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An Examination of Website Security Considerations
An unfortunate fact is that there are various ways in which website security can be jeopardised. Security risks are ever present which have an effect on Web servers and LANs (local area networks) on which Web sites are located, even by the normal use of a Web browser.
Web Masters face the flak when coping with the major threats. As soon as a Web server is installed at a site, a window comes into being in the local area network through which anyone using the Internet can look. Naturally, on the whole web site visitors see only what they're supposed to look at, but just a few of them attempt to locate elements of the site which are not supposed to be detectable by all and sundry. Nefarious visitors want to go further than simply look; they try to unbolt the window and sneak through. The damage they can inflict might be sheer vandalism, for instance changing the website's home page with their own that might say or display anything at all, or it might be burglary, such as stealing a contacts or sales database.
It is hard to avoid the virtual certainty that complicated computer software contains bugs. No matter how carefully it's tested, there will be as a rule some pattern of events or user actions, while it might be rare, that causes a failure. Software bugs cause holes in system security. A Web server is complex software that may very likely include a security defect.
It is not only the intricacy of a Web server which can produce a problem, but also its open architecture. Think about a CGI script as a case in point. A CGI script can be processed at the server in response to a remote request from a client. It might be a request from a program or even the click of a button in a browser. If the CGI script contains a bug, there is a danger of a security violation.
Network Administrators also have to take on problems from Web servers due to the threat they pose to the security of the local area network. While there must be no unauthorized incursions, right of entry has to be granted to website visitors. This means that access to the network should be controlled. The Administrator therefore must perform a delicate balancing act. Even the most sturdy firewall can be undermined if the Web server is configured badly. By the same token, normal use of the website may be unachievable if the firewall is configured poorly. Arriving at a model resolution is still more complicated if an intranet is a constituent of the system. Usually, the Web server then has to be configured to distinguish and verify domains and user groups, which are apt to have differing permission levels and access privileges.
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Almost all people using a browser to surf the Net think that they really are doing so anonymously and securely. It is not so. Web browsers can run autonomous software on the local computer that are located on a web site. Modern browsers display a notice and request authorization to run such programs. Identified commonly as "active content", e.g., ActiveX controls or Java applets, these programs, if malicious, can easily deposit a virus or other dangerous software on the browser user's machine. As soon as it's in the system it can inflict all kinds of catastrophe and may be very tricky to get rid of.
This is also a worry for Network Administrators. Web browsers afford a route for possibly malicious software to seep all the way through the local area network's firewall. When it is in the system, the harm it can cause can range from covertly appropriating confidential information to meaningless spoliation.
Apart from the matters involving active content, merely browsing the Web leaves a trail of the user's activities in the browser's history. This can be utilized by web sites and installed software to establish a precise profile of the user's behavior and interests. Despite the fact that this may be frowned upon as an invasion of privacy by some people, it can be helpful by offering germane content instantaneously, thus relieving the user of the task of trying to find it.
Confidentiality is a subject which concerns not only browser users but also Web Masters and Network Administrators in the actual transmission of information by means of the Web. TCP/IP (Transmission Control Protocol/Internet Protocol) is the fundamental language of communication for the Net. When it was created, security was not the principal aspect of its blueprint. Both network and Internet transmissions should therefore not be thought of as as necessarily private. Whenever the browser on a local machine downloads a sensitive file from the remote Web server, or the browser user fills in a form with personal information and clicks the 'Submit' button, the transmitted information can be intercepted without authorization.
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