Website security consultant
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Web Site Security Issues - An Understanding
An unfortunate fact is that there are several ways in which website security can be jeopardised. For example, security dangers are ever present which might impinge on Web servers and LANs (local area networks) where Web sites are located, even by the customary use of a Web browser.
Web Masters shoulder the responsibility when managing the major threats. As soon as a Web server is set up at a site, a window comes into being in the local area network through which anyone on the Internet can look. Certainly, as a rule web site visitors look at no more than what they're meant to see, but a few attempt to uncover elements of the site that aren't intended to be visible to all and sundry. Iniquitous visitors wish to go further than only look; they make an effort to open the window and slip through. The damage intruders may inflict might be sheer vandalism, for instance replacing the website's home page with one of theirs that might say or put on view anything, or else it could be burglary, such as appropriating a customers or sales database.
It's difficult to evade the probability that complicated computer software includes bugs. No matter how scrupulously it's tested, there exists more often than not a particular pattern of events or user actions, while it might come about rarely, that causes an error. Software bugs produce breaches in system security. A Web server is involved software that can quite probably contain a security flaw.
It's not merely the intricacy of a Web server which may instigate a problem, but also its open architecture. Consider a CGI script as an illustration. A CGI script may be run at the server in answer to a remote request from a client. This might be a request from an application or even the click of a button in a browser. If the CGI script has a bug, there will be a danger of a security breach.
Network Administrators also have to deal with problems from Web servers due to the threat they pose to the security of the local area network. While there must be no unauthorised intrusions, admittance must be granted to website visitors. This means that access to the network should be controlled. The Administrator therefore needs to perform a delicate balancing act. Even the most robust firewall can be undermined if the Web server is configured badly. Bearing that in mind, normal use of the website can be unachievable if the firewall is configured poorly. Reaching a model answer is even more complicated if an intranet forms an element of the system. Usually, the Web server in that case needs to be configured to recognise and verify domains and user groups, which are liable to have varying permission levels and access rights.
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Nearly everybody using a browser to surf the Web think that they're doing so in secret and in safety. It is not the case. Web browsers may execute autonomous software on the user's computer which 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, could easily install a virus or other hazardous software on the browser user's computer. When it is in the system it can inflict all kinds of catastrophe and can be exceedingly tough to eradicate.
This is also a worry for Network Administrators. Web browsers provide a means for potentially malicious software to filter all the way through the local area network's firewall. When it is in the network, the harm it may cause can range from clandestinely stealing sensitive information to meaningless carnage.
Besides the matters surrounding active content, just surfing the Internet leaves a trail of the user's activities in the browser's history. This might be used by web sites and installed software programs to determine an exact profile of the user's behaviour and interests. Though this might be considered an invasion of privacy by some people, it can be helpful by displaying relevant content straight away, thus unburdening the user of the job of looking for it.
Confidentiality is a problem which worries not only browser users but also Web Masters and Network Administrators during 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 Internet. When it was created, security was not the most critical factor of its design. Both network and Internet transmissions should therefore not be thought of as as automatically private. Each time the browser on a local PC downloads a sensitive file from the remote Web server, or the browser user fills in a form with private information and clicks the 'Submit' button, the transmitted data might be intercepted without authorization.
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