Why Use Spam Filters And Vulnerability Scanning?

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. Confused? Well, these are the subject lines of some of the mails that enter our mailbox and, most of the time, are nothing but a source of virus. After all why all of a sudden someone would be so kind to offer me so much money? The main idea behind these exciting but overly unrealistic mails is to coax us to open the mail attachment, which would contain the virus. These annoying mails are known as spam and can be only stopped by using spam filters. To protect your computer from such threats you may run vulnerability scanning that uses a scanner to search for application, system and network weaknesses. The potential risk faced by these components can be determined by the scanning process.

Spam mails or junk emails are identical messages sent to numerous recipients. Spam messages have been exponentially increasing in number since the 1990s to such an extent that billions of spam messages are generated and sent everyday. A large percentage (about 80%) of these messages is believed to be sent by not more than 200 spammers using the virus infected systems such as Botnets. Spam costs are postage due and hence are bore by the receivers. The legality of spam mails vary from country to country. According to CAN-SPAM ACT of the year 2003, it is legalized in U.S.A. In such a case one is left with no other option than to use spam filters to block these spam mails.

Different Spam filters have varied working procedure. The filter might inspect the body of the mail along with its header. If its IP address is known to be coming from a spammer, the message is sent back to the sender. This procedure only works when IP addresses of spammers are known beforehand. Companies receiving thousands of messages each day, if struck with virus due to spam will generally report about them. That is how your server knows which email should be blocked.

Spam filters may send a validation form to the sender of the email, if they are suspicious about its content. A spammer in most cases would not waste his time filling up the form. If the validation form is not sent back, the filter will as such block the mail.

Alternatively, the spam filters can tag the mails containing inappropriate content and allow you to send it to a spam folder if necessary. A mail with a header such as free information could get blocked by the spam filter, although it might be a newsletter that you had requested for. Using this type of spam filters will prevent over-blocking of mails.

Virus and other cyber bugs find a way into our applications, system and network through various sources. To create a protective online working environment, vulnerability scanning should be performed as often as possible along with installing spam filters. Vulnerability scanning uses specific software that finds security flaws in our application, system and network with penetration testing. According to the findings a report of the potential unauthorized threats are reported. Vulnerability scanning could also mean scanning of the internal networks which do not have internet connection. This especially helps in detecting virus-infected software as well as malicious interests of an employee in a company. A vulnerability scanning is must for any system.

by: Alice Brooks

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