By Syngress, James Stanger
The entire huge viruses of contemporary occasions (think "Melissa" and the "Love Bug") have used email protocols to propagate themselves - frequently benefiting from the address-book beneficial properties of e mail consumers to spot their sufferers. the email Virus safety instruction manual explores the way you, as an administrator of an electronic mail server (and probably a number of the community assets that encompass it), can shield your clients from productiveness loss that effects from email virus an infection. This ebook is most suitable to directors of smallish networks who've accountability for (and direct regulate over) firewalls and network-wide antivirus recommendations, in addition to email readers at the purchaser side.The authors of this quantity (and there are a number of) start by way of explaining how and why e mail viruses paintings - they aspect the finger almost always at software program that is designed for slick presentation of mail rather than for safeguard, in addition to at uninformed finish clients. Then, they start to give an explanation for what quite a few countermeasures, together with antivirus software program and firewalls, can do, and supply particular configuration suggestion. additionally they discover technique of configuring well known e mail servers and consumers for optimum resistance to viruses. total, this ebook is punctiliously researched and may supply process directors with the knowledge - either sensible and heritage - that they should guard their structures from the various extra insidious threats round.
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Extra resources for E-mail Virus Protection Handbook : Protect your E-mail from Viruses, Tojan Horses, and Mobile Code Attacks
Mutations of BubbleBoy have appeared since it was originally introduced to the Internet in November of 1999. Some of these mutations can have destructive effects. Love Letter This worm was released from a computer in the Philippines. It targets MUAs that are designed to run Visual Basic scripts (again, Microsoft Outlook and Outlook Express). vbs,” contains malicious script that has your MUA (usually Microsoft Outlook or Outlook Express) automatically send copies of itself to all of the contacts it finds in your address book.
Sniffing and/or man-in-the-middle This attack captures information as it flows between a client and a server. Usually, a hacker attempts to capture TCP/IP transmissions, because they may contain information such as user names, passwords, or the actual contents of an e-mail message. A sniffing attack is often classified as a man-in-the-middle attack, because in order to capture packets from a user, the machine capturing packets must lie in between the two systems that are communicating (a man-in-themiddle attack can also be waged on one of the two systems).
When you need to transmit information across the Internet, it would also be nice if you could ensure that this information was not tampered with during transit. One way to do this is to electronically sign a message by creating a hash of the message. Hash codes are created through a process that closely reads the contents of a message. Contents include the size of the message, the characters within it, and how they are arranged. Any single change in the document results in a different hash value.